Districts
A. Purpose. The general purposes of this Chapter are:
1. To encourage land use decision making in accordance with the public interest and applicable laws of the state of Washington;
2. To protect the general public health, safety, and welfare;
3. To implement the City of Sammamish interim comprehensive plan’s policies and objectives through land use regulations;
4. To provide for the economic, social, and aesthetic advantages of orderly development through harmonious groupings of compatible and complementary land uses and the application of appropriate development standards;
5. To provide for adequate public facilities and services in conjunction with development; and
6. To promote general public safety by regulating development of lands containing physical hazards and to minimize the adverse environmental impacts of development.
B. Interpretation—Applicability and intent.
1. Intent. This chapter and SMC 21.09.070 establish the procedure by which the City of Sammamish will render a formal interpretation of a development regulation. The purpose of such an interpretation includes clarifying conflicting or ambiguous provisions in the City’s development regulations.
2. Applicability. This chapter and SMC 21.09.070 authorize the director to issue interpretations on regulations related to controls placed on development or land use activities by the City, including but not limited to zoning ordinances, critical areas ordinances, shoreline master program requirements, official controls, subdivision ordinances, and binding site plan ordinances, together with any amendments thereto. Nothing in this chapter and SMC 21.09.070 shall prevent interpretations related to the applicability of specific regulatory requirements contained within the Sammamish Municipal Code to individual projects. Further, nothing in this chapter or SMC 21.09.070 shall preclude the director or hearing examiner from interpreting a regulatory requirement during the course of a public hearing.
C. Interpretation—General.
1. In case of inconsistency or conflict, regulations, conditions, or procedural requirements that are specific to an individual land use shall supersede regulations, conditions, or procedural requirements of general application.
2. A land use includes the necessary structures to support the use unless specifically prohibited or the context clearly indicates otherwise.
3. In case of any ambiguity, difference of meaning, or implication between the text and any heading, caption, or illustration, the text and the permitted use tables in Chapter 21.05 SMC shall control. All applicable requirements shall govern a use whether or not they are cross-referenced in a text section or land use table.
4. Unless the context clearly indicates otherwise, words in the present tense shall include past and future tense, and words in the singular shall include the plural, or vice versa. Except for words and terms defined in this Chapter, all words and terms used in this Chapter shall have their customary meanings.
5. A written interpretation by the director of the provisions of the Sammamish Municipal Code clarifies conflicting or ambiguous wording, or the scope or intent of the provisions of the code. The written interpretation shall control application of the code sections discussed in it to any specific land use application. Written interpretations issued for regulatory requirements that have been legislatively modified, repealed, or otherwise substantially changed, shall be considered null and void.
6. Any written interpretation shall not be applied retroactively, unless specifically required by the terms of the interpretation.
D. Interpretation—Standard industrial classification.
1. All references to the standard industrial classification (SIC) are to the titles and descriptions found in the Standard Industrial Classification Manual, 1987 Edition, prepared by the United States Office of Management and Budget that is hereby adopted by reference. The SIC is used, with modifications to suit the purposes of this Chapter, to list and define land uses authorized to be located in the various zones consistent with the Comprehensive Plan land use map.
2. The SIC categorizes each land use under a general two-digit major group number, or under a more specific three- or four-digit industry group or industry number. A use shown on a land use table with a two-digit number includes all uses listed in the SIC for that major group. A use shown with a three-digit or four-digit number includes only the uses listed in the SIC for that industry group or industry.
3. An asterisk (*) in the SIC number column of a land use table means that the SIC definition for the specific land use identified has been modified by this Chapter. The definition may include one or more SIC subclassification numbers, or may define the use without reference to the SIC.
4. The director shall determine whether a proposed land use not specifically listed in a land use table or specifically included within a SIC classification is allowed in a zone. The director’s determination shall be based on whether or not permitting the proposed use in a particular zone is consistent with the purposes of this Chapter and the zone’s purpose as set forth in SMC 21.04.020, by considering the following factors:
a. The physical characteristics of the use and its supporting structures, including but not limited to scale, traffic and other impacts, and hours of operation;
b. Whether or not the use complements or is compatible with other uses permitted in the zone; and
c. The SIC classification, if any, assigned to the business or other entity that will carry on the primary activities of the proposed use.
E. Interpretation—Zoning maps. Where uncertainties exist as to the location of any zone boundaries, the following rules of interpretation, listed in priority order, shall apply:
1. Where boundaries are indicated as paralleling the approximate centerline of the street right-of-way, the zone shall extend to each adjacent boundary of the right-of-way. Non-road-related uses by adjacent property owners, if allowed in the right-of-way, shall meet the same zoning requirements regulating the property owner’s lot;
2. Where boundaries are indicated as approximately following lot lines, the actual lot lines shall be considered the boundaries;
3. Where boundaries are indicated as following lines of ordinary high water, or government meander line, the lines shall be considered to be the actual boundaries. If these lines should change the boundaries shall be considered to move with them; and
4. If none of the rules of interpretation described in subsections 1. through 3. of this section apply, then the zoning boundary shall be determined by map scaling.
F. Interpretation—Public request—Acknowledgment—Notice.
1. A person may request a code interpretation by submitting a request in accordance with this chapter. The director may also issue a code interpretation on the director’s own initiative.
2. A request for a code interpretation must be submitted in writing to the director.
3. A code interpretation request must:
a. Be in writing and shall be clearly labeled “Request for Code Interpretation.” Failure to satisfy this requirement relieves the director of any obligation to acknowledge or otherwise process the request;
b. Identify the person seeking the code interpretation and provide an address to which correspondence regarding the requested code interpretation should be mailed;
c. Identify the specific section or sections of the City of Sammamish’s development regulations for which an interpretation is requested;
d. Identify the parcel or site, if the code interpretation request involves a particular parcel of property or site;
e. Identify the code enforcement action, if the code interpretation request involves a code enforcement case;
f. Be accompanied by the fee required as set forth by the adopted fee resolution; and
g. Be limited to a single subject, which may require interpretation of one or more code sections.
4. Within 21 days after receiving a code interpretation request, the director shall acknowledge receipt of the request. The director shall mail the acknowledgment to the person submitting the request at the address provided in the request. The acknowledgment shall include the following information, as applicable:
a. If the director determines that the code interpretation request does not contain the information required under this section, the director shall identify in the acknowledgment the deficiencies in the code interpretation request. In such a situation, the director is under no obligation to process the code interpretation request until a code interpretation request complying with this chapter is submitted;
b. If the director determines that the code interpretation request is ambiguous or unclear, the director may request that the person making the request clarify the request. The director is under no obligation to process the code interpretation request until an adequately clarified code interpretation request is submitted;
c. If the director determines that the code interpretation request presents substantially the same issue as is pending before an adjudicatory body, such as the City hearing examiner, the City council when acting as a quasi-judicial body, any other quasi-judicial agency or any local, state or federal court, the director shall so state in the acknowledgment. The director is then under no obligation to further process the code interpretation request; and
d. If a code interpretation is requested regarding an issue that the director has previously addressed through a code interpretation, the director is not obligated to issue another code interpretation and shall so state in the acknowledgment required by this section and shall identify the previous code interpretation.
e. If the director determines that the code interpretation request relates to a particular parcel of property, the director shall cause notice of the code interpretation request to be given to the taxpayer of record for the subject parcel.
f. If the code interpretation request relates to a specific development project pending before the City, the director shall cause notice of the code interpretation request to be given to all parties of record for that project, including the applicant.
g. If the code interpretation is initiated by the City, the director shall cause notice of the code interpretation to be posted on the City’s website and at City Hall in addition to any other notice required by this section.
h. The notice required under this section must include a copy of any code interpretation request and a copy of the director’s acknowledgment. Notice to property taxpayers, applicants, or persons requesting an interpretation may be by United States mail or other appropriate method of delivery.
G. Classification of right-of-way.
1. Except when such areas are specifically designated on the zoning map as being classified in one of the zones provided in this Chapter, land contained in rights-of-way for streets or alleys, or railroads shall be considered unclassified.
2. Within street or alley rights-of-way, uses shall be limited to street purposes as defined by law.
3. Within railroad rights-of-way, allowed uses shall be limited to tracks, signals, or other operating devices, movement of rolling stock, utility lines and equipment, and facilities accessory to and used directly for the delivery and distribution of services to abutting property.
4. Where such right-of-way is vacated, the vacated area shall have the zone classification of the adjoining property with which it is first merged. (Ord. O2021-540 § 2 (Att. A))
A. Zones and Map Designations Established. In order to accomplish the purposes of this chapter the following zoning designations and zoning map symbols are established:
Zoning Map Designations | |
|---|---|
Zoning Designation | Map Symbol |
Residential | R (base density in dwellings per acre) |
Neighborhood Business | NB |
Community Business | CB |
Office | O |
Middle Housing Overlay 1 | MHO-1 |
Middle Housing Overlay 2 | MHO-2 |
Middle Housing Overlay 3 | MHO-3 |
B. Zone and Map Designation Purpose. The purpose statements for each zone and map designation set forth in the following sections shall be used to guide the application of the zones and designations to all lands in City of Sammamish. The purpose statements also shall guide interpretation and application of land use regulations within the zones and designations and any changes to the range of permitted uses within each zone through amendments to this chapter.
C. Residential Zone.
1. The purpose of the residential (R) zone is to implement comprehensive plan goals and policies for housing quality, diversity, and affordability and to efficiently use residential land, public services, and energy. These purposes are accomplished by:
a. Providing, in the R-1 through R-8 zones, for a mix of predominantly single detached dwelling units and other development types, with a variety of densities and sizes in locations appropriate for urban densities;
b. Providing, in the R-12 or R-18 zone, for a mix of predominantly apartment and townhouse dwelling units and other development types, with a variety of densities and sizes in locations appropriate for urban densities;
c. Allowing only those accessory and complementary nonresidential uses that are compatible with residential communities; and
d. Establishing density designations to facilitate advanced area-wide planning for public facilities and services, and to protect environmentally sensitive sites from overdevelopment.
2. Use of this zone is appropriate in urban areas or activity centers, designated by the comprehensive plan or community plans as follows:
a. The R-1 zone on or adjacent to lands with area-wide environmental constraints where development is required to cluster away from sensitive areas, on lands designated urban separators or wildlife habitat network where development is required to cluster away from the axis of the corridor, or in well-established subdivisions of the same density, which are served at the time of development by public or private facilities and services adequate to support planned densities;
b. The R-4 through R-8 zones on urban lands that are predominantly environmentally unconstrained and are served at the time of development, by adequate public sewers, water supply, streets, and other needed public facilities and services; and
c. The R-12 or R-18 zone in urban areas, urban or community activity centers or urban neighborhood centers, that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
D. Neighborhood Business Zone.
1. The purpose of the neighborhood business (NB) zone is to provide convenient daily retail and personal services for a limited service area and to minimize impacts of commercial activities on nearby properties and in urban areas on properties with the land use designation of commercial outside of center, to provide for limited residential development. These purposes are accomplished by:
a. Limiting nonresidential uses to those retail or personal services that can serve the everyday needs of a surrounding urban residential area;
b. Allowing for mixed use (housing and retail/service) developments and for townhouse developments as a sole use on properties in the urban area with the land use designation of commercial outside of center.
2. Use of this zone is appropriate in urban neighborhood business centers, designated by the comprehensive plan, on sites that are served at the time of development by adequate public sewers when located in urban areas or adequate on-site sewage disposal, water supply, streets and other needed public facilities and services.
E. Community Business Zone.
1. The purpose of the community business (CB) zone is to provide convenience and comparison retail and personal services for local service areas that exceed the daily convenience needs of adjacent neighborhoods but that cannot be served conveniently by larger activity centers, and to provide retail and personal services in locations within activity centers that are not appropriate for extensive outdoor storage or auto-related and industrial uses. These purposes are accomplished by:
a. Providing for limited small-scale offices as well as a wider range of the retail, professional, governmental and personal services than are found in neighborhood business areas;
b. Allowing for mixed use (housing and retail/service) developments; and
c. Excluding commercial uses with extensive outdoor storage or auto-related and industrial uses.
2. Use of this zone is appropriate in urban and community centers that are designated by the adopted City of Sammamish comprehensive plan and community plans and that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
F. Office Zone.
1. The purpose of the office (O) zone is to provide for pedestrian and transit-oriented high-density employment uses together with limited complementary retail and urban density residential development in locations within activity centers where the full range of commercial activities is not desirable. These purposes are accomplished by:
a. Allowing for uses that will take advantage of pedestrian-oriented site and street improvement standards;
b. Providing for higher building heights and floor area ratios than those found in community centers;
c. Reducing the ratio of required parking to building floor area;
d. Allowing for on-site convenient daily retail and personal services for employees and residences; and
e. Excluding auto-oriented, outdoor or other retail sales and services that do not provide for the daily convenience needs of on-site and nearby employees or residents.
2. Use of this zone is appropriate in activity centers designated by the adopted City of Sammamish comprehensive plan that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
G. Repealed.
H. Middle Housing Overlays. The purpose of the middle housing overlays is to provide for middle housing typologies through form-based zoning controls. The middle housing overlays apply to the following zones:
1. MHO-1 applies to the R-1 district.
2. MHO-2 applies to the R-4 district.
3. MHO-3 applies to the R-6 and R-8 districts.
I. Zoning Maps and Boundaries.
1. The location and boundaries of the zones defined by this chapter shall be shown and delineated on zoning maps adopted by ordinance.
2. Changes in the boundaries of the zones, including application or amendment of interim zoning, shall be made by ordinance adopting or amending a zoning map.
3. Zoning maps are available for public review at the City of Sammamish offices during regular business hours. (Ord. O2025-583 § 2 (Att. A.4); Ord. O2024-578 § 2 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Purpose. The purpose of this chapter is to establish basic dimensional standards for development, generally related to residential density and commercial intensity, setbacks, height, individual building bulk and variation, as well as specific rules for general application. The standards and rules are established to provide flexibility in project design and regulate some of the effects of density and intensity of development.
Additional design criteria are located in SMC 21.02, Neighborhood Design, and apply to all residential development.
B. Interpretation of Tables.
1. SMC 21.04.030.C and SMC 21.04.030.D contain general density and dimension standards for the various zones and limitations specific to a particular zone(s). Additional rules, exceptions, and methodologies are set forth in SMC 21.04.030.E through SMC 21.04.030.X.
2. The density and dimension tables are arranged in a matrix format on two separate tables and are delineated into two general land use categories:
a. Residential; and
b. Commercial.
3. Development standards are listed down the left side of both tables, and the zones are listed at the top. The matrix cells contain the minimum dimensional requirements of the zone. The parenthetical numbers in the matrix identify specific requirements applicable either to a specific use or zone. A blank box indicates that there are no specific requirements. If more than one standard appears in a cell, each standard will be subject to any applicable parenthetical footnote following the standard.
C. Site Planning Standards—Residential Zones.
Residential Zones | ||||||
|---|---|---|---|---|---|---|
STANDARDS | R-1 | R-4 | R-6 | R-8 | R-12 | R-18 |
DENSITY AND LOT DIMENSIONS | ||||||
Maximum Density, DU/Acre (8) | 1 du/ac | 4 du/ac (2) | 6 du/ac | 8 du/ac | 12 du/ac | 18 du/ac |
85% | 80% | 75% | ||||
Minimun Lot Width | 35' | 30' | 30' | 30' | 30' | 30' |
Maximum Residential Floor to Area Ratio (FAR) – Detached alley accessed garages are exempt | ||||||
Single-Family | 50% | 50% | 50% | 50% | ||
ADU | Exempt | Exempt | Exempt | Exempt | ||
See subsection Y of this section, Site Planning Standards – Middle Housing Overlays | ||||||
Building Footprint Maximum | 3,000 square feet (maximum per building) | |||||
Hardscape Coverage Maximum (10) | 30% | 40% | 50% | 75% | 85% | 85% |
Front Yard Setback Landscaping Minimum | 30% | 30% | ||||
DRIVEWAYS (MEASURED AT THE EDGE OF THE STREET RIGHT-OF-WAY, NOT APPLICABLE FOR DRIVEWAYS FROM ALLEYS) AND PARKING | ||||||
Driveway Width Maximum | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | ||
Driveway Width Minimum | 12' | 12' | 12' | 12' | ||
Driveway Length Minimum to Required Spaces From Street Property Line | 20' | 20' | 20' | 20' | ||
BUILDING SETBACKS | ||||||
Front Yard Minimum | 20' (5) | 10' | 10' | 10' | ||
25' | 10' (6) | 5' | 5' | |||
Rear Yard Minimum | 30' | 20' | 20' | 20' | ||
Buildings Less Than 2,500 Square Feet | ||||||
15' | 15' | |||||
Side Yard Minimum | 5' | 5' | ||||
Rear Yard | 15' average, 12' minimum | 15' average, 12' minimum | ||||
Buildings Between 2,500 and 4,000 Square Feet | ||||||
20' | 15' | |||||
Side Yard | 10' average, | 10' average, | ||||
Rear Yard | 20' average, | 20' average, | ||||
Buildings Greater Than 4,000 Square Feet | ||||||
25' | 20' | |||||
Side Yard | 12' average, | 12' average, | ||||
Rear Yard | 25' average, | 25' average, | ||||
Side Yard Minimum | 5' | 5' | 5' | 5' | 5' | 5' |
Rear Yard Minimum | 5' | 5' | 5' | 5' | 5' | 5' |
Front Yard Minimum | 20' (5) | 15' (5) | 15' (5) | 10' | 10' | 10' |
10' | 10' | 10' | 10' | 5' | 5' | |
Rear Yard Minimum | 10' | 10' | 10' | 10' | 5' | 5' |
HEIGHT MAXIMUMS | ||||||
35' | 35' | 35' | 35' | 60' | 60' | |
Detached Accessory Dwellings | 24' | 24' | 24' | 24' | 24' | 24' |
Development Conditions:
(1)These standards may be modified under the provisions for zero lot line and townhouse developments.
(2)Mobile home parks shall be allowed a density of up to six dwelling units per acre.
(3)See subsection I of this section for information on minimum density calculations.
(4)When constructed in accordance with accessory dwelling unit regulations in SMC 21.05.010.C.5.a.
(6)Side yard setbacks may be a minimum of five feet when the abutting property is zoned R-8, R-12, or R-18.
(7)Only applies to stand-alone detached accessory dwelling units. Does not apply to detached accessory dwelling units that are combined with other structures or improvements such as pool houses, outdoor kitchens, detached garages, covered patios, etc. Standard minimum structure setbacks apply to detached accessory dwelling units that are combined with other structures and improvements.
(8)Maximum density for R-1, R-4, R-6, and R-8 districts may be exceeded under middle housing development as specified in the site planning standards for middle housing overlays in subsection Y of this section.
(9)Maximum floor to area ratios and site planning standards for middle housing are specified in subsection Y of this section.
(10)Accessory dwelling units are exempt from hardscape coverage and floor area ratio calculations when constructed on a lot with a single-family home and in accordance with the regulations in SMC 21.05.010.C, Note (5)(a).
D. Densities and Dimensions—Commercial Zones.
Commercial Zones | |||
|---|---|---|---|
Zones | Commercial | ||
STANDARDS | NB | CB | O |
Maximum Density: DU/Acre | 8 du/ac (1) | 18 du/ac (1) | 18 du/ac (1) |
Minimum Lot Area | |||
Maximum Lot Depth/Width Ratio | 10 ft | 10 ft | |
20 ft (5) | 20 ft (5) | 20 ft (5) | |
10 ft (2) | 10 ft (2) | 10 ft | |
20 ft (5) | 20 ft (5) | 20 ft (5) | |
35 ft 45 ft (3) | 35 ft 60 ft (3) | 45 ft 60 ft (3) | |
Maximum Floor/Lot Ratio: Square Feet | 1/1 (6) | 1.5/1 (6) | 2.5/1 (6) |
Maximum Impervious Surface: Percentage (8) | 85% | 85% | 75% |
Development Conditions:
(1)These densities are allowed only through the application of mixed use development standards and for stand-alone townhouse development in the NB zone on property designated commercial outside of center in the urban area.
(2)Gas station pump islands shall be placed no closer than 25 feet to street front lines.
(3)This maximum structure height allowed only for mixed use developments and for stand-alone townhouse development in the NB zone on property designated commercial outside of center in the urban area.
(4)Required on property lines adjoining residential zones.
(5)Required on property lines adjoining residential zones for industrial uses established by conditional use permits.
(6)The floor/lot ratio for mixed use developments shall conform to SMC 21.07.060.
(7)Height limits may be increased when portions of the structure or building which exceed the maximum structure height limit provide one additional foot of front, rear, and side yard setback for each foot above the maximum structure height limit, provided the maximum height may exceed 75 feet only in mixed use developments. Netting or fencing and support structures for the netting or fencing used to contain golf balls in the operation of golf courses or golf driving ranges are exempt from this additional setback requirement; provided, that the maximum height shall not exceed 75 feet.
(8)The impervious surface area for any lot may be increased beyond the total amount permitted in this chapter subject to approval of a conditional use permit.
E. Measurement Methods. The following provisions shall be used to determine compliance with this Chapter:
1. Front yard setbacks shall be measured from the property line or lot line of an existing edge of a street right-of-way or temporary turnaround, except as provided by SMC 21.04.030.R;
2. Lot widths shall be measured by scaling a circle of the applicable diameter within the boundaries of the lot; provided, that an access easement shall not be included within the circle;
3. Structure height shall be measured from the average existing grade of land prior to any cuts and fills or other disturbances associated with the proposed project to the highest point of the structure or roof. The average existing grade shall be determined by first delineating the smallest square or rectangle that can enclose the structure or building and then averaging the existing grade elevations taken at the midpoint of each side of the square or rectangle;
4. Lot area shall be the total horizontal land area contained within the boundaries of a lot; and
5. Impervious surface calculations shall not include areas of turf, landscaping, natural vegetation, surface water flow control, or water quality treatment facilities.
F. Minimum Urban Residential Density. Minimum density for residential development in the urban areas designated by the comprehensive plan shall be based on the tables in this chapter and adjusted as provided for in SMC 21.04.030.I.
G. Calculations—Allowable Dwelling Units, Lots, or Commercial Floor Area. Permitted number of dwelling units, lots, or commercial floor area shall be determined as follows:
1. The allowed number of dwelling units or lots (base density) shall be computed by multiplying the site area specified in SMC 21.04.030.H by the applicable residential base density number;
2. The maximum density (dwelling units or lots) limits shall be computed by adding the bonus or transfer units authorized by SMC 21.06.070 to the base units computed under subsection G.1 of this section;
3. The allowed commercial floor area, which excludes structured or underground parking areas and areas housing mechanical equipment, shall be computed by applying the floor-to-lot area ratio to the project site area specified in SMC 21.04.030.H;
4. Repealed.
5. When calculations other than density calculations result in a fraction, the fraction shall be rounded to the nearest whole number as follows:
a. Fractions of 0.51 or above shall be rounded up;
b. Fractions of 0.50 or below shall be rounded down; and
c. For the purpose of the application of this part, rounding is based on a fraction that is truncated to two numbers past the decimal point. For example, 2.50823 is truncated to 2.50; and
6. When density calculations result in a fraction:
a. For multifamily and attached dwelling projects located in the R-8, R-12, R-18, NB, CB, or O zone with density calculations resulting in a fraction, the fraction shall be rounded to the nearest whole number as follows:
i. Fractions of 0.51 or above shall be rounded up; and
ii. Fractions of 0.50 or below shall be rounded down.
b. Subdivisions. For subdivision proposals with density calculations resulting in 10 or more whole units of density before rounding fractions, the fraction may be rounded to the nearest whole number when the fraction is equal to or greater than 0.51. The extra unit achieved by rounding up must be used for an affordable housing unit duplex meeting the requirements of SMC 21.05.010.C.17, 21.07.100.E, and 21.07.100.F. For example, a subdivision proposal with a density calculation resulting in 10.51 would yield 10 single-family detached residential units, or 10 single-family detached residential units and one affordable housing unit duplex consisting of two affordable housing units for a total of 12 units. Nothing in this subsection restricts or limits the application of the density bonus provisions found in other sections of the code.
c. Short Subdivisions. For subdivision proposals with density calculations resulting in nine or fewer whole units of density before rounding fractions, the fraction may be rounded to the nearest whole number when the fraction is equal to or greater than 0.71. The extra unit achieved by rounding up must be used for an affordable housing unit duplex meeting the requirements of SMC 21.05.010.C.17, 21.07.100.E, and 21.07.100.F. For example, a subdivision proposal with a density calculation resulting in 4.71 would yield four single-family detached residential units, or four single-family detached residential units and one affordable housing unit duplex consisting of two affordable housing units for a total of six units. Nothing in this subsection restricts or limits the application of the density bonus provisions found in other sections of the code.
d. For subdivision proposals with density calculations resulting in fractions and where the project design utilizes townhomes or duplexes for at least 25 percent of the total project units, the fraction shall be rounded to the nearest whole number as follows:
i. Fractions of 0.21 or above shall be rounded up; and
ii. Fractions of 0.20 or below shall be rounded down.
e. For the purpose of the application of this part, rounding is based on a fraction that is truncated to two numbers past the decimal point. For example, 2.50823 is truncated to 2.50.
H. Calculations—Site Area Used for Density Calculations.
1. All site areas may be used in the calculation of maximum allowed residential density or project floor area except as outlined under the provisions of subsection 2. of this section.
2. Existing submerged lands, steep slopes and buffers, Categories 1 – 4 wetlands and buffers, Types S, F, Np, and Ns streams and buffers, and property to be used as a street(s) shall not be credited toward base and maximum density or floor area calculations; provided, that subdivisions or short plats that meet the tree retention standards of SMC 21.03.060.G, Tree retention requirements, shall be credited 10 percent of the environmentally sensitive areas and associated buffers identified above.
a. The site has accumulated sufficient technique points pursuant to SMC 21.03.030.D, preferred low impact development incentives, to allow for inclusion of such areas as set forth in that section; or
b. The site meets the tree retention incentives of SMC 21.03.060.G, in which case 10 percent of the critical areas and buffers identified above may be included in the site area used for calculating base and maximum density or floor area.
I. Calculations—Site Area Used for Minimum Density Calculations. Minimum density shall be determined by:
1. Multiplying the density (dwelling units/acre) as set forth in subsection H of this section by the net buildable area of the project site; and then
2. Multiplying the resulting product by minimum density percentage set forth in subsection F of this section.
J. Building Height Measurement.
1. General. Buildings on relatively flat sites must use the measurement in subsection J.2.a of this section. Buildings on steeply sloping sites or set back more than 20 feet from the street right-of-way must use the measurement in subsection J.2.b of this section.
2. Measurement of Height.
a. On any lot where existing grade slopes up or down less than six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building, the starting point for the calculation of structure height is the elevation measured from average existing grade to the highest point of the building. The average existing grade elevation is calculated using the existing elevation of the midpoint of each wall segment averaged to create the average existing grade plan as depicted below:


b. On any lot where existing grade slopes up or down at least six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building, the starting point for the measurement of height must be calculated as follows:
i. Draw the smallest rectangle that encloses the entire principal structure.

ii. Divide the side of the rectangle into equal segments measuring at least 15 feet in length. The lines must be extended across the rectangle perpendicular to the side of the rectangle to create the segment B.

iii. The maximum height for each segment of the structure is measured from the average grade for each segment along the structure. The average existing grade is calculated by adding the elevation of original grade at the midpoint of the two opposing exterior walls of each segment and dividing by two.

3. Maximum Side Wall Height. The maximum side wall height of any building must not exceed 24 feet. A side wall is any wall generally parallel to a side lot line and located closer than two feet to a five-foot side yard building setback or any wall located closer than four feet to any larger side yard building setback. This height is measured from either:
a. Average original grade at the midpoint of a building where existing grade slopes up or down less than six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building; or

b. The average grade calculated for each segment for buildings subject to subsection J.2.b of this section.


K. Lot area—Prohibited reduction. Any portion of a lot that was used to calculate compliance with the standards and regulations of this Chapter shall not be subsequently subdivided or segregated from such lot.
L. Measurement of setbacks.
1. Side Yard Setback. The side yard setback is the setback between a structure and any lot line to which neither the street nor rear yard setback applies. The side yard setback is measured from a side yard lot line to a line parallel to and measured perpendicularly from the side yard lot line at the depth prescribed for each zone. Four-sided corner lots abutting streets on two sides shall have two side setbacks and no rear setback.
2. Front Yard Setback. The front yard setback is measured between a structure and the front yard lot line. The front yard setback is measured from a front yard lot line to a line parallel to (offset to) and measured perpendicularly from the front yard lot line at the depth prescribed for each zone. In lots adjoining two or more front yards, including corner lots, the minimum front yard setback shall apply to all such front yards.
3. Rear Yard Setback. The rear yard setback is the setback measurement between a structure and the rear yard lot line. Four-sided lots adjoining more than one street shall have no rear yard setback. In triangular lots with one street frontage, the rear setback shall be measured from the shorter of the lot lines not adjoining the streey.
M. Setbacks—Specific building or use. When a building or use is required to maintain a specific setback from a property line or other building, such setback shall apply only to the specified building or use.
N. Setbacks—Livestock buildings and manure storage areas.
1. The minimum setback for any building used to house, confine or feed swine shall be 90 feet. If a greater dimension is specified within this code the greater dimension shall apply.
2. The minimum setback for any building used to house, confine or feed any other livestock shall be 25 feet. If a greater dimension is specified within this code the greater dimension shall apply.
3. The minimum setback for any manure storage area shall be 35 feet. If a greater dimension is specified within this code the greater dimension shall apply.
O. Setbacks—Modifications. The following setback modifications are permitted:
1. When the common property line of two lots is covered by a building(s), the setbacks required by this chapter shall not apply along the common property line; and
2. When a lot is located between lots having nonconforming front yard setbacks, the required front yard setback for such lot may be the average of the two nonconforming setbacks or 60 percent of the required front yard setback, whichever results in the greater front yard setback.
3. Reduction of minimum rear yard and/or side yard setbacks to no less than five feet shall be granted when bundled and submitted with a Type I permit application and when agreement with the adjoining property owner(s) of a parcel under separate ownership has been reached resulting in an executed agreement that includes an approved site plan consenting to a reduction of setback. The agreement shall provide that it runs with the land and must be recorded with King County Records prior to permit issuance. The agreement shall reference the parcel number and legal description of all affected properties and conform to a format specified by the director. Setback reductions granted under this part shall not cause for a violation or nonconformance with existing site restrictions (e.g., easements) or adopted construction codes, Chapter 16.05 SMC. The setback reduction granted under this part shall not be available for or applicable to lots created through the subdivision process that remain vested under RCW 58.17.170.
P. Setbacks—Required building separation. The provisions of this section do not apply to zero lot line development proposed pursuant to SMC 21.07.060.
Q. Setbacks—From regional utility corridors.
1. In subdivisions and short subdivisions, areas used as regional utility corridors shall be contained in separate tracts.
2. In other types of land development permits, easements shall be used to delineate such corridors.
3. All buildings and structures shall maintain a minimum distance of five feet from property or easement lines delineating the boundary of regional utility corridors, except for utility structures necessary to the operation of the utility corridor or when structures are allowed by mutual agreement in the utility corridor.
R. Setbacks—From alley.
1. Structures may be built to a property line abutting an alley, except as provided in subsection 2. of this section.
2. Vehicle access points from garages, carports or fenced parking areas shall be set back from the alley property line to provide a straight line length of at least 26 feet, as measured from the centerline of the garage, carport or fenced parking area, from the access point to the opposite edge of the alley. No portion of the garage or the door in motion may cross the property line.
S. Setbacks—Required modifications. The following setback modifications are required:
1. In addition to providing the standard street setback, a lot adjoining a half-street or designated arterial shall provide an additional width of street setback sufficient to accommodate construction of the planned half-street or arterial; and
2. Where the standard setback for a property is modified within an adopted neighborhood plan area zoning, the applicable setback shall be that specified therein.
T. Setbacks—Projections and structures allowed. Provided, that the required setbacks from regional utility corridors of SMC 21.04.030.Q, as allowed in the environmentally critical areas of SMC 21.03.020.S, the adjoining half-street or designated arterial setbacks of SMC 21.04.030.S and the sight distance requirements of SMC 21.04.030.W are maintained, structures may extend into or be located in required setbacks, as follows:
1. Fireplace structures, bay or garden windows, enclosed stair landings, closets, or similar structures may project 30 inches into a rear yard or front yard setback and 18 inches into a side yard setback, provided such projections are:
a. Limited to two per facade; and
b. Not wider than 10 feet;
2. Uncovered porches and decks that exceed 18 inches above the finished grade may project five feet into the front yard setback;
3. Uncovered porches and decks not exceeding 18 inches above the finished grade may project to the street property line;
4. Eaves may not project more than:
a. Twenty-four inches into a rear yard or front yard setback; or
b. Eighteen inches across a lot line in a zero lot line development, provided there are appropriate easements, and that any neighboring building and its associated eaves are 10 feet from the lot line; or
5. Fences in accord with SMC 21.06.020.E.1;
6. Rockeries, retaining walls and curbs may project into or be located in any setback provided these structures:
a. Do not exceed a height of six feet in the R-1 through R-18 zones;
b. Do not exceed the building height for the zone in commercial zones, measured in accordance with the standards established in the International Building Code, SMC Title 16; and
c. Are in accordance with the requirements in SMC 21.03.020, Environmentally Critical Areas;
7. Fences located on top of rockeries, retaining walls or berms are subject to the requirements of SMC 21.06.020.E;
8. Telephone poles and lines; power poles and lines; cable TV and Internet lines; light and flagpoles; trellises not exceeding eight feet in height, not wider than 10 feet; culverts; underground water facilities; underground sewer facilities; and accessory facilities for the provision of utilities, such as drains, but excluding electrical and cellular equipment cabinets, and similar utility boxes and vaults;
9. The following may project into or be located within a setback, but may only project into or be located within a rear yard or side yard setback area if an agreement documenting consent between the owners of record of the abutting properties is recorded with the King County Department of Records and Elections prior to the installment or construction of the structure:
a. Sprinkler systems, heat pumps, air conditioning units, electrical and cellular equipment cabinets and other similar utility boxes and vaults;
b. Security system access controls;
c. Structures, except for buildings, associated with trails and on-site recreation spaces and play areas required in SMC 21.02.030.I and SMC 21.02.030.K such as benches, picnic tables and drinking fountains; and
d. Surface water management facilities as required by Chapter 9.04 KCC as adopted by SMC 21.03.050;
10. Mailboxes and newspaper boxes may project into or be located within front yard setbacks;
11. Fire hydrants and associated appendages;
12. Metro bus shelters may be located within front yard setbacks;
13. Unless otherwise allowed in SMC 21.06.050.F.1, freestanding and monument signs four feet or less in height, with a maximum sign area of 20 square feet, may project into or be located within front yard setbacks; and
14. Stormwater vaults, structures, and conveyance systems, both above and below ground, provided such projections are:
a. Consistent with setback, easement and access requirements specified in the current Surface Water Design Manual; or
b. In the absence of said specifications, not within 10 feet of the property line for stormwater vaults and structures, and not within five feet of the property line for conveyance systems.

U. Height—Exceptions to limits. The following structures may be erected above the height limits of SMC 21.04.030.C through SMC 21.04.030.E:
1. Roof structures housing or screening elevators, stairways, tanks, ventilating fans or similar equipment required for building operation and maintenance; and
2. Fire or parapet walls, skylights, flagpoles, public athletic field lighting, chimneys, smokestacks, church steeples, crosses, spires, communication transmission and receiving structures, utility line towers and poles, and similar structures.
3. Netting or fencing and support structures for the netting or fencing used to contain golf balls in the operation of golf courses or golf driving ranges may have a maximum height of 75 feet.
4. In the R-18 zone, structures may be up to 80 feet in height for projects using residential density incentives and transfer of density credits pursuant to this title.
5. For school and government uses, structure height may exceed the maximum structure height by one foot for every one foot the front, side, and rear yard setbacks are increased above the minimum setbacks; provided, however, the maximum structure height may not exceed 75 feet.
V. Lot divided by zone boundary. When a lot is divided by a zone boundary, the following rules shall apply:
1. When a lot contains both residential and nonresidential zoning, the zone boundary between the zones shall be considered a lot line for determining permitted building height and required setbacks on the site;
2. When a lot contains residential zones of varying density:
a. Any residential density transfer within the lot shall be allowed from the portion with the lesser residential density to that of the greater residential density;
b. Residential density transfer from the higher density zone to the lower density zone may be allowed only when:
i. The units transferred from any R-12 or R-18 zoned portion of the lot are maintained in an attached dwelling unit configuration on the lower density portion receiving such units;
ii. The transfer does not reduce the minimum density achievable on the lot;
iii. The transfer enhances the efficient use of needed infrastructure;
iv. The transfer does not result in significant adverse impacts to the low density portion of the lot;
v. The transfer contributes to preservation of environmentally sensitive areas, wildlife corridors, or other natural features; and
vi. The transfer does not result in significant adverse impacts to adjoining lower density properties;
c. Compliance with these criteria shall be evaluated during review of any development proposals in which such a transfer is proposed; and
3. Uses on each portion of the lot shall only be those permitted in each zone pursuant to Chapter 21.05 SMC.
W. Sight Distance Requirements. Except for utility poles and traffic control signs, the following sight distance provisions shall apply to all street intersections and site access points:
1. A sight distance triangle area as determined by paragraph 2. below shall contain no fence, berm, vegetation, on-site vehicle parking area, signs or other physical obstruction between 42 inches and 8 feet above the existing street grade.

2. The sight distance triangle at:
a. A street intersection shall be determined by measuring 15 feet along both street property lines beginning at their point of intersection. The third side of the triangle shall be a line connecting the endpoints of the first two sides of the triangle; or
b. A site access point shall be determined by measuring 15 feet along the street lines and 15 feet along the edges of the driveway beginning at the respective points of intersection. The third side of each triangle shall be a line connecting the endpoints of the first two sides of each triangle.
c. The Director may require modification or removal of structures or landscaping located in required street setbacks, if:
d. Such improvements prevent adequate sight distance to drivers entering or leaving a driveway; and
e. No reasonable driveway relocation alternative for an adjoining lot is feasible.
X. Impervious Surface Standards.
1. Regional uses shall establish impervious surface standards at the time of permit review.
2. Nonresidential uses in residential zones shall comply with SMC 21.04.030.M.
3. A lot may increase beyond the total amount of permitted impervious surface in SMC 21.04.030 subject to approval of a conditional use permit.
4. In the R-1 zoning district:
a. Lots smaller than one-half acre in area shall comply with standards of the nearest comparable R-4 through R-8 zone.
b. For lots that are one-half acre in area or larger, the impervious surface area allowed shall be 10,000 square feet or 30 percent of the property, whichever is greater.
c. On any lot over one acre in area, an additional five percent of the lot area may be used for buildings related to agricultural or forestry practices.
d. For lots smaller than two acres but larger than one-half acre, an additional 10 percent of the lot area may be used for structures which are determined to be medically necessary, provided the applicant submits with the permit application a notarized affidavit, conforming with the requirements of SMC 21.05.030.H.1.b.
e. Public projects shall be subject to the applicable impervious surface provisions of the R-4 zone.
5. For school and government uses, maximum impervious surface limitations, minimum yard area requirements, and maximum lot coverage restrictions may be increased as part of the review of a Type 1, Type 2, or Type 3 permit application to accommodate instances where they render a necessary component of a project infeasible. Deviation from the maximum impervious surface limitations, minimum yard area requirements, and maximum lot coverage restrictions shall be granted if the following are satisfied:
a. the proposed increase is the minimum necessary to resolve the design conflict as demonstrated through written engineering analysis prepared by a qualified consultant and verified by the City;
b. the proposed increase will not result in impact to the root zone and tree protection areas required for retained significant trees under SMC 21.03.060.I; and
c. the project is compliant with applicable stormwater regulations.
Y. Site Planning Standards – Middle Housing Overlays.
1. Applicability. All residential development under this subsection must comply with the mandatory affordable housing requirements established in Chapter 21.10 SMC. When an affordable housing unit is built on site meeting the requirements of subsection Y.2 of this section, the affordable housing requirements of Chapter 21.10 SMC have been met.
2. Maximum Density. Allowable density in the middle housing overlays is defined by unit density (the number of units per lot) or net density (the number of units per acre), whichever results in the greater number of units. The maximum number of units in a single structure in any overlay is six.
MHO-1 | MHO-2 | MHO-3 | |||
|---|---|---|---|---|---|
Units/Lot | Units/Lot | Units/Acre | Units/Lot | Units/Acre | |
All lots | 3* | 3 | 12 | 3 | 18 |
Lots with one affordable unit or if existing home is retained** | 4* | 4 | 12 | 4 | 18 |
Lots 1/4-mile walking distance from an existing or planned transit stop | 4* | 4 | 12 | 4 | 18 |
*MHO-1 cottage allowance permitted in SMC 21.04.030.E.
**The unit density must not exceed 4 units in MHO-1 unless using the cottage allowance permitted in SMC 21.04.030.E.
3. Density Calculation Example. Three possible lot sizes in R-6 are used below to demonstrate how unit density and net density allowed under this section are calculated to determine which method results in the greatest number of units allowed by MHO-3. Additional calculation standards for allowable dwelling units and rounding of fractions are specified in subsection G of this section.
a. Seven thousand two hundred sixty square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (7,260/43,560) * 18 = 3 units.
b. Five thousand square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (5,000/43,560) * 18 = 2.1 units.
c. Nine thousand square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (9,000/43,560) * 18 = 3.7 units.
4. Floor Area Ratio. Floor area ratio limits are based on the underlying district standards established in subsection C of this section with an increase of 0.15 FAR permitted per unit above one unit:
Floor Area Ratio (FAR) | |
|---|---|
Two Units | 0.65 |
Three Units | 0.80 |
Four Units | 0.95 |
Five Units | 1.10 |
Six Units | 1.25 |
5. Floor Area Ratio Calculation Example. The floor area ratio limitations are used to calculate the maximum allowable gross floor area across one or multiple structures on a site, based on the net lot area. For example, the total allowable gross floor area for three units on a 10,000 square-foot lot is 9,500 square feet (10,000 x 0.95). This area can be distributed in any way across the three units provided the buildings comply with the development regulations specified below. Gross square footage for the purpose of calculating FAR includes all gross square footage that is above grade including garages.
6. Unit Types. Unit types are used to establish general intensity options for each lot within MHO-1 and MHO-2. Possible configurations for each lot type are shown to encourage creative site and building design and to help expand housing options across Sammamish’s neighborhoods. The configurations shown are not an exhaustive list; additional configurations that fit within the rules of the overlays are encouraged.
a. Two-Unit Retaining Existing Structure.

b. Two-Unit Redevelopment.

c. Three-Unit Retaining Existing Structure.

d. Three-Unit Redevelopment.

e. Four-Unit Retaining Existing Structure.

f. Four-Unit Redevelopment.

7. Lot – Detached Configuration.

Note: Letters in each diagram correspond to letters in the tables below.
Lot – Detached Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table SMC 21.04.030.C | ||
D | |||
E | |||
F | Space Between Buildings (min) | 15 ft | 10 ft |
8. Parking and Access – Detached Configuration.

Parking and Access – Detached Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
9. Amenity Space – Detached Configuration.

Amenity Space – Detached Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
10. Building Form – Detached Configuration.

11. Lot – Attached Configuration.

Lot – Attached Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table 21.04.030.C | ||
D | |||
E | |||
12. Parking and Access – Attached Configuration.

Parking and Access – Attached Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
13. Amenity Space – Attached Configuration.

Amenity Space – Attached Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
14. Building Form – Attached Configuration.

Building Form – Attached Configuration
Height | ||
|---|---|---|
A | Height (max stories/feet) | 3/35 ft |
Massing | ||
Building Footprint (max per building) | 3,000 SF | |
Primary Street Width (up to 4 Units) | 60 ft | |
5+ Units (max) | 15 ft add’l per unit | |
Up to 2 Units (min) | 1 | |
3 – 4 Units (min) | 2 | |
5 – 6 Units (min) | 4 | |
B | Street-Facing Entry Spacing (max) | 20 ft |
C | Active Entry Depth (min) | 6 ft |
15. Lot – Stacked Configuration.

Lot – Stacked Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table SMC 21.04.030.C | ||
D | |||
E | |||
16. Parking and Access – Stacked Configuration.

Parking and Access – Stacked Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
17. Amenity Space – Stacked Configuration.

Amenity Space – Stacked Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
18. Building Form – Stacked Configuration.

Z. MHO-1 Cottage Allowance.
1. Purpose. The purpose of this subsection is to provide additional density for cottage housing beyond the middle housing densities specified in subsection Y of this section. Cottage housing enhances the existing development pattern in the R-1 zone and is appropriate for an additional density allowance compared to other middle housing types. The MHO-1 cottage allowance only applies to cottage housing projects exceeding middle housing densities proposed within the MHO-1 overlay.
More extensive design standards are established for cottage housing to accommodate the increased density allowance. Unless specified below, all other development standards in the Sammamish Development Code apply.
2. Intent. Cottage housing is intended to be a more community-minded, smaller scale alternative to typical R-1 development. Smaller buildings create opportunities for higher densities while also allowing for a more sensitive response to vegetation, topography, and drainage.
Ideally, cottage housing will take the form of compact homes clustered in pockets around shared yards, scattered through the lush forest environment that defines the City. Unit clustering promotes a sense of community while providing flexibility to preserve site topography by minimizing grading, maintaining natural drainage patterns, and retaining existing vegetation. New landscaping should blend with or reinstate existing forest ecosystems. The presence of vehicles should be minimized. Opportunities to walk and bike around the site should be prioritized, and connections to existing trail systems within the neighborhood are encouraged.
See SMC 21.02.030, Neighborhood Design Standards, for further site design standards.
3. Application Requirements. In addition to the application requirements established in SMC 21.09.010, a tree retention and root zone protection plan is required as part of the preapplication process for cottage housing developments. The plan must include:
a. Location and size of all existing trees.
b. Approximate proposed building footprint locations demonstrating how the cottage cluster layout has been optimized using design flexibility to retain meaningful clusters of significant trees and associated middle and understory vegetation.
c. Clear indication of trees intended to be removed and retained, including replanting plans demonstrating compliance with the City’s tree preservation requirements in SMC 21.03.060.
4. Site Design Principles.
a. Site Entry. Cottage developments should have welcoming pedestrian entrances facing the ROW. Pedestrian entrances may incorporate gates, trellises, landscaping, benches, stacked stones, pillars, or other inviting ornamental features.
b. Private Yards. Private yards help to ensure the ongoing maintenance and sense of ownership within the site. Each unit must have an associated private yard that is clearly defined through the use of low fences, low stone walls, plantings, paving, or similar features. Private yards should encompass a series of spaces around the perimeter of a unit, creating a transitional buffer zone between the unit and the rest of the development. Providing private yard space with several different exposures, and access to sunlight at different times of year, is encouraged. Private yards may encroach into setbacks. Private yards may be forested.
c. Roofs. Gables, dormers, shed roofs, shed dormers, and upper level decks are all permitted as long as all roofs conform to the minimum pitch standards.
d. Community Buildings. Community buildings are intended to provide an indoor gathering place for residents, allowing for a variety of uses and serving as a location for events that individual units may not be able to accommodate. Community buildings are optional but strongly encouraged.
5. Lot – MHO-1 Cottage Allowance.

Lot – MHO-1 Cottage Allowance
Unit Density per Cluster | ||
|---|---|---|
Developments may have multiple clusters. | ||
A | Lot Line | |
Minimum Units per Cluster | 4 units | |
Maximum Units per Cluster | 12 units | |
Coverage | ||
B | Hardscape Coverage (max) | 40% |
Building Placement | ||
C | 20 ft | |
D | 25 ft | |
E | 20 ft/30 ft | |
F | Space Between Buildings (min) | 10 ft |
G | Unit Clustering (min) | 75% of all units must be included in a cluster |
6. Parking and Access – MHO-1 Cottage Allowance.

Parking and Access – MHO-1 Cottage Allowance
Pedestrian Access and Walkway Setbacks | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. The first 80 sf of each walkway connecting to an existing trail will not be included in hardscape calculations. | ||
A | Walkway Setback From Primary Entrance Facade (min) | 10 ft |
B | Walkway Setback from Sides of Buildings (min) | 4 ft with landscaped privacy buffer or 8 ft of open space |
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of two curb cuts are permitted per street frontage with a minimum spacing of 100 ft. | ||
Parking Lot Location | ||
C | Set behind at least 1 building or screened with min. 15 ft landscape buffer so as not to be visible from the street. Buffer may be in setback. | |
D | 5 ft | |
E | Setback From Building (min) | 4 ft with landscaped privacy buffer or 8 ft of open space |
Required Parking Spaces | ||
Parking should be located and designed to preserve trees wherever possible. | ||
Minimum Off-Street Parking Required | 1 stall per unit | |
F | Parking Clusters Required (max) | 4 stalls per parking cluster or 5-ft-wide landscaped buffers every 3 stalls |
Garages | ||
G | Setback (min) | 10 ft from front of dwelling unit |
H | Orientation and Access | Vehicle access to the garage is not permitted from the front of the unit. |
I | Footprint (max) | 1 stall per unit/240 sf |
Building footprint/area calculations | Garages count toward hardscape coverage, but do not count towards building footprint or area calculations. | |
7. Amenity Space – MHO-1 Cottage Allowance.

Amenity Space – MHO-1 Cottage Allowance
Shared and Private Amenity Space Required | |||
|---|---|---|---|
Required amenity space must take the form of a shared yard as well as private yards for each unit. | |||
Shared Yards | |||
A | Area – at grade (min) | 300 sf per unit, 3,000 sf total minimum | 800 sf per unit |
B | Minimum of Smallest Dimension | 25 ft | none |
Community Buildings | |||
Community buildings must be located on the same site as the cottage housing development and be commonly owned by the residents. Community buildings must be enclosed structures and must contain at a minimum bathroom and kitchen facilities. Community buildings may also include event space, guest rooms, laundry facilities, or any other community-oriented amenity. | |||
Shared Yard Calculations | Community building floor area may be counted towards the shared yard calculation, provided the total minimum shared yard is still achieved. | ||
Density and Coverage Calculations | Community buildings count towards hardscape coverage calculations. | ||
Building Dimensional Standards | Community buildings must conform to the same dimensional standards as Type A cottages, with the exception of the building footprint. Upper levels must be 0.5 stories and will still conform to the upper-level ratio standard for Type A cottages. | ||
Footprint (min/max) | 500 sf minimum/80 sf per cottage maximum. | ||
8. Building Form – MHO-1 Cottage Allowance.

Building Form – MHO-1 Cottage Allowance
Two types of cottages are permitted to maximize flexibility in building placement and lot coverage while retaining existing site features. Projects are encouraged to mix cottage types to provide increased housing diversity. | |||
Type A Cottages | Type B Cottages | ||
|---|---|---|---|
Height | |||
A | Height (max stories/feet) | 1.5/26 ft | 2/28 ft |
Massing | |||
Building Footprint/Floor Area (max per building) | 900 sf | 1,000 sf total floor area | |
Partially Below Grade Floor Area: The floor area of portions of a cottage that are no more than 4 ft above grade will not be counted towards footprint or area calculations. This includes upper level ratio calculations, so that below grade floor area will not increase the potential size of an upper level. | |||
Upper-Level Habitable Space Ratio | Cannot exceed 80% of lower level gross floor area | Cannot exceed 100% of lower level floor area | |
B | Roof Pitch (min) | primary roof: 6:12 | primary roof: 6:12 |
Attached Units: Duplexes (no more than 2 attached units) are allowed. Attached units must each, individually, conform to the requirements of Column A or B. For example two attached cottages could have a combined footprint of up to 1,800 sf. | |||
Front Porches: Every unit must have a covered entry porch oriented toward common space or street. The porch must be open on at least two sides, and not be enclosed. Each porch must have a minimum area of 70 sf and a minimum dimension of 6 ft on all sides. Porches must be associated with primary point of entry. Porches may encroach into primary and side street setbacks. | |||
Orientation: At least 75% of interior-unit entries must face a shared yard. | |||
C | Active Entry Depth (min) | 6 ft | 6 ft |
(Ord. O2025-583 § 2 (Att. A.5, A.6); Ord. O2024-578 § 2 (Att. A); Ord. O2023-553 § 1 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Scope of Chapter. This chapter contains definitions of technical and procedural terms used throughout the code and definitions of land uses listed in tables in Chapter 21.05 SMC. The definitions in this chapter supplement the Standard Industrial Classification Manual (SIC). See Chapter 21.01 SMC for rules on interpretation of the code, including use of these definitions. Development standards are found in SMC 21.02.050, 21.03.020, 21.03.030, 21.03.060, 21.04.030, 21.05.020, 21.06.010 through 21.06.070, and 21.09.130. The city of Sammamish adopts by reference the definitions contained in WAC 197-11-700 through 197-11-799.
B. Definitions.
Abandoned vehicle. Any vehicle left upon the property of another without the consent of the owner of such property for a period of 24 hours or longer, except that a vehicle shall not be considered abandoned if its owner or operator is unable to remove it from the place where it is located and so notifies law enforcement officials and requests assistance.
Accessible electric vehicle charging station. An electric vehicle charging station where the battery charging station equipment is located within accessible reach of the barrier-free access aisle (minimum 36-inch width) and the electric vehicle.
Accessory dwelling unit. An attached, detached, or stacked dwelling unit located on the same lot as a single-family or multifamily dwelling unit.
Accessory living quarters. Living quarters in an accessory building for the use of the occupant or persons employed on the premises, or for temporary use of guests of the occupant. Such quarters have no kitchen and are not otherwise used as a separate dwelling unit.
Accessory use, commercial.
a. A use that is subordinate and incidental to a commercial use, including, but not limited to, the following uses:
i. Administrative offices;
ii. Employee exercise facilities;
iii. Employee food service facilities;
iv. Incidental storage of raw materials and finished products sold or manufactured on site;
v. Business owner or caretaker residence;
vi. Cogeneration facilities; and
vii. Ground maintenance facilities.
b. Some accessory uses within the scope of this section may be defined separately to enable the code to apply different conditions of approval.
Accessory use, residential.
a. A use, structure, or activity that is subordinate and incidental to a residence on the same parcel including, but not limited to, the following uses:
i. Accessory living quarters and dwellings;
ii. Fallout/bomb shelters;
iii. Keeping household pets;
iv. On-site rental office;
v. Pools, private docks, piers;
vi. Antennas for private telecommunication services;
vii. Storage of yard maintenance equipment;
viii. Storage of private vehicles, e.g., motor vehicles, boats, trailers or planes;
ix. Greenhouses;
x. Garages.
b. Some accessory uses within the scope of this section may be defined separately to enable the code to apply different conditions of approval.
Adjustment factor. A factor that, when applied to the reference evapotranspiration, adjusts for plant factors and irrigation efficiently.
Adult use facility. An enterprise predominantly involved in the selling, renting, or presenting for commercial purposes of books, magazines, motion pictures, films, video cassettes, cable television, live entertainment, performance, or activity distinguished or characterized by a predominant emphasis on the depiction, simulation, or relation to “specified sexual activities” as defined in this chapter for observation by patrons therein. Examples of such facilities include, but are not limited to, adult book or video stores and establishments offering panorams, peep shows, or topless or nude dancing.
“Affordable housing” and “affordable unit.” A dwelling unit(s) reserved for occupancy by eligible households and having monthly housing expenses to the occupant no greater than 30 percent of a given monthly household income, adjusted for household size, as follows:
a. Low Income. Eighty percent of the area median income.
b. Very Low Income. Fifty percent of area median income.
c. Extremely Low Income. Thirty percent of the area median income.
d. Pursuant to the authority of RCW 36.70A.540, the City finds that the higher income levels specified in the definition of “affordable housing” in this chapter, rather than those stated in the definition of “low-income households” in RCW 36.70A.540, are needed to address local housing market conditions in the City.
Agricultural product sales. The retail sale of items resulting from the practice of agriculture, including crops such as fruits, vegetables, grains, seed, feed, and plants, or animal products such as eggs, milk, and meat.
Airport/heliport. Any runway, landing area, or other facility, excluding facilities for the primary use of the individual property owner that are classified as helistops, designed or used by public carriers or private aircraft for the landing and taking off of aircraft, including the following associated facilities:
a. Taxiways;
b. Aircraft storage and tie-down areas;
c. Hangars;
d. Servicing; and
e. Passenger and air freight terminals.
AKART. All known, available, and reasonable methods of prevention, control, and treatment.
Alley. An improved thoroughfare or right-of-way, whether public or private, usually narrower than a street, that provides vehicular access to an interior boundary of one or more lots, and is not designed for general traffic circulation.
Alteration. Any human activity that results or is likely to result in an impact upon the existing condition of a critical area is an “alteration” that is subject to specific limitations as specified for each critical area. Alterations include, but are not limited to, grading, filling, dredging, draining, channelizing, applying herbicides or pesticides or any hazardous substance, discharging pollutants, except stormwater, grazing domestic animals, paving, constructing, applying gravel, modifying for surface water management purposes, cutting, topping, relocating or removing vegetation or any other human activity that results or is likely to result in an impact to existent vegetation, hydrology, fish or wildlife, or fish or wildlife habitat. Alterations do not include walking, fishing, or any other passive recreation or other similar activities.
Alternative water sources. Stored rainwater or treated or recycled wastewater of a quality suitable for uses such as landscape irrigation. Such water is not considered potable.
Amenity space. A designated space intended for recreational and social use, and the enjoyment and benefit of on-site residents and their guests. Shared amenity spaces are shared among all the units and must include some combination of seating, open lawn, barbeques, plantings, gardens for the use of residents, water features, or other recreational facilities. Private amenity spaces are for the exclusive use of one unit and may include some combination of the shared amenity space features.
Amusement arcades. A building or part of a building in which five or more pinball machines, video games, or other such player-operated amusement devices (excluding juke boxes or gambling-related machines) are operated.
Anadromous fish. Those that live part or the majority of their lives in saltwater, but return to freshwater to spawn.
Ancillary structure. For the purposes of this chapter, any form of development associated with a wireless communications facility, including but not limited to: foundations, concrete slabs on grade, guy anchors, generators, and feed lines; however, specifically excluding base stations.
Animal, small. Any animal other than livestock or animals considered to be predatory or wild that are kept outside a dwelling unit all or part of the time. Animals considered predatory or wild, excluding those in zoo animal breeding facilities, shall be considered small animals when they are taken into captivity for the purposes of breeding, domestication, training, hunting, or exhibition.
Applicant. A property owner or a public agency or public or private utility that owns a right-of-way or other easement or has been adjudicated the right to such an easement pursuant to RCW 8.12.090, or any person or entity designated or named in writing by the property or easement owner to be the applicant, in an application for a development proposal, permit or approval.
Application rate. The depth of water applied to an area expressed in inches per hour.
Area median income. The area median income for the Seattle-Bellevue, WA Metro Fair Market Rent (FMR) Area as most recently determined by the Department of Housing and Urban Development (HUD). In the event that HUD no longer publishes area median income figures for the Seattle-Bellevue FMR Area or King County, the City may use any other method for determining the median income.
Artist studio. An establishment providing a place solely for the practice or rehearsal of various performing or creative arts, including, but not limited to, acting, dancing, singing, drawing, painting, and sculpting.
Attached housing. Horizontal residential building configuration in which individual dwelling units share at least one wall. Examples include fee-simple or condominium townhomes or side-by-side duplexes, triplexes, or fourplexes. Accessory dwelling units attached to a principal residence are also considered attached housing.
Auction house. An establishment where the property of others is sold by a broker or auctioneer to persons who attend scheduled sales periods or events.
Barn. A large agricultural building for storage of agricultural products and sheltering livestock.
Base flood. A flood having a one percent chance of being equaled or exceeded in any given year, often referred to as the “100-year flood.”
Base flood elevation. The water surface elevation of the base flood in relation to the National Geodetic Vertical Datum of 1929.
Battery charging station. An electrical component assembly or cluster of component assemblies designed specifically to charge batteries within electric vehicles, which meets or exceeds applicable state and federal standards.
Battery electric vehicle (BEV). Any vehicle that operates exclusively on electrical energy from an off-board source that is stored in the vehicle’s batteries, and produces zero tailpipe emissions or pollution when stationary or operating (see “Electric vehicle”).
Battery exchange station. A fully automated facility that will enable an electric vehicle with a swappable battery to enter a drive lane and exchange the depleted battery with a fully charged battery through a fully automated process, which meets or exceeds applicable state and federal standards.
Bed and breakfast guesthouse. A dwelling unit or accessory building within which bedrooms are available for paying guests.
Beehive. A structure designed to contain one colony of honey bees (Apis mellifera).
Berm. A constructed area of compacted earth.
Best available science. The process used and information developed consistent with requirements in RCW 36.70A.172 and WAC 365-195-900 through 365-195-925. Additionally, consistent with federal guidance to recognize and incorporate indigenous knowledge (IK) in decision making, best available science may include IK as appropriate.
Billboard. A sign, including both the supporting structural framework and attached billboard faces, used principally for advertising a business activity, use, product, or service unrelated to the primary use or activity of the property on which the billboard is located; excluding off-premises directional, or temporary real estate signs.
Biologist. A person who has earned at least a Bachelor of Science degree in the biological sciences from an accredited college or university or who has equivalent educational training and experience.
Bioretention. A flow control best management practice consisting of a shallow landscaped depression designed to temporarily store and promote infiltration of stormwater runoff. Standards for bioretention design, including soil mix, plants, storage volume and feasibility criteria, are specified in Appendix C of the King County Surface Water Design Manual.
Book, stationery, video, and art supply store. An establishment engaged in the retail sale of books and magazines, stationery, records and tapes, video, and art supplies, including only uses located in SIC Industry Nos.:
a. 5942 – Book stores;
b. 5943 – Stationery stores;
c. 5999 – Architectural supplies and artists’ supply and materials stores;
d. 7841 – Video tape rental;
e. 5735 – Record, compact disc, and prerecorded tape stores; and
f. 5736 – Musical instrument stores.
Broadleaf tree. A tree characterized by leaves that are broad in width and may include both deciduous and evergreen species.
Buffer. A designated area contiguous to a steep slope or landslide hazard area intended to protect slope stability, attenuation of surface water flows and landslide hazards, or a designated area contiguous to a habitat conservation area, stream or wetland intended to protect the habitat, stream or wetland and be an integral part of the habitat, stream or wetland ecosystem.
Building. Any structure having a roof, including every building, house, structure, or other like object.
Building envelope. Area of a lot that delineates the limits of where a building may be placed on the lot.
Building facade. That portion of any exterior elevation of a building extending from the grade of the building to the top of the parapet wall or eaves, for the entire width of the building elevation
Building, hardware, and garden materials store. An establishment engaged in selling lumber and other building materials, feed, or lawn and garden supplies, including, but not limited to, uses located in SIC Major Group No. 52, Building materials, hardware, garden supply; excluding mobile home dealers.
Bulk gas storage tank. A tank from which illuminating, heating, or liquefied gas is distributed by piping directly to individual users.
Bulk retail. An establishment offering the sale of bulk goods to the general public, including limited sales to wholesale customers. These establishments offer a variety of lines of merchandise including but not limited to food, building, hardware and garden materials, dry goods, apparel and accessories, home furnishings, housewares, drugs, auto supplies, hobby, toys, games, photographic, and electronics.
Campground. An area of land developed for recreational use in temporary occupancy, such as tents or recreational vehicles without hook-up facilities.
Capacity, school. The number of students a school district’s facilities can accommodate district-wide, based on the district’s standard of service, as determined by the school district.
Capital facilities plan, school. A district’s facilities plan adopted by the school board consisting of:
a. A forecast of future needs for school facilities based on the district’s enrollment projections;
b. The long-range construction and capital improvements projects of the district;
c. The schools under construction or expansion;
d. The proposed locations and capacities of expanded or new school facilities;
e. At least a six-year financing plan component, updated as necessary to maintain at least a six-year forecast period, for financing needed school facilities within projected funding levels, and identifying sources of financing for such purposes, including bond issues authorized by the voters and projected bond issues not yet authorized by the voters;
f. Any other long-range projects planned by the district;
g. The current capacity of the district’s school facilities based on the district’s adopted standard of service, and a plan to eliminate existing deficiencies, if any, without the use of impact fees; and
h. An inventory showing the location and capacity of existing school facilities.
Catastrophic collapse. The collapse of the ground surface by overburden caving into underground voids created by mining. Catastrophic collapse does not include the effects from trough subsidence.
Cattery. A place where adult cats are temporarily boarded for compensation, whether or not for training. An adult cat is of either sex, altered or unaltered, that has reached the age of six months.
Cemetery, columbarium or mausoleum. Land or structures used for interment of the dead or their remains. For purposes of the code, pet cemeteries are considered a subclassification of this use.
Certified arborist. An individual that has successfully passed the certified arborist examination administered by the International Society of Arboriculture (ISA) and possesses a minimum of three years’ full-time experience working in the professional tree care industry.
Channel relocation and stream meander areas. Those areas subject to risk due to stream bank destabilization, rapid stream incision, stream bank erosion, and shifts in the location of stream channels.
Charging levels. The standardized indicators of electrical force or voltage at which an electric vehicle’s battery is recharged. Levels 1, 2, and 3 are the most common EV charging levels, and include the following specifications:
a. Level 1 is considered slow charging.
b. Level 2 is considered medium charging.
c. Level 3 is considered fast or rapid charging.
Church, synagogue, or temple. A place where religious services are conducted, including those uses located in SIC Industry No. 866 and including accessory uses in the primary or accessory buildings such as religious education, reading rooms, assembly rooms, and residences for nuns and clergy. This definition does not include facilities for training of religious orders.
City Council. The Sammamish City Council.
Classrooms, school. Educational facilities of the district required to house students for its basic educational program. The classrooms are those facilities the district determines are necessary to best serve its student population. Specialized facilities as identified by the district, including but not limited to gymnasiums, cafeterias, libraries, administrative offices, and child care centers, shall not be counted as classrooms.
Clearing. The limbing, pruning, trimming, topping, cutting or removal of vegetation or other organic plant matter by physical, mechanical, chemical or other means.
Co-living housing. A residential development with sleeping units that are independently rented and lockable and provide living and sleeping space, and residents share kitchen facilities with other sleeping units in the building. Co-living housing includes, but is not limited to, congregate living facilities, single room occupancy, rooming house, boarding house, lodging house, and residential suites.
Code interpretation. A formal statement regarding the meaning or requirements of a particular provision in the City of Sammamish’s development regulations.
Cogeneration. The sequential generation of energy and useful heat from the same primary source or fuel for industrial, commercial, or residential heating or cooling purposes.
Collective garden. Any area or location where qualifying patients engage in the production, processing, transporting, and delivery of marijuana for medical use.
Community identification sign. A sign identifying the location of a community or geographic area such as unincorporated activity centers or rural towns designated by the comprehensive plan or communities recognized and delineated by a recognized unincorporated area council.
Commuter parking lot. Vehicle parking specifically for the purpose of access to a public transit system or for users of carpools or vanpools.
Compensatory storage. New, excavated storage volume equivalent to any flood storage which is eliminated by building filling or grading within the floodplain. For the purpose of this definition, equivalent flood storage capacity is that which is replaced by equal volume between corresponding one-foot contour intervals that are hydraulically connected to the floodway through their entire depth.
Conditional use permit. A permit granted by the City to locate a permitted use on a particular property subject to conditions placed on the permitted use to ensure compatibility with nearby land uses.
Conference center. An establishment developed primarily as a meeting facility, including only facilities for recreation, overnight lodging, and related activities provided for conference participants.
Conservation easement. A legal agreement between a landowner and a land trust or government agency that permanently limits uses of the land in order to protect its nondevelopment values. It allows the landowner to continue to own and use the land, to sell it, or to pass it on to heirs. A conservation easement is placed on a sending site at the time development rights are sold from the property. The conservation easement typically prohibits any further development of the property but allows resource uses, such as farming and forestry, to continue.
Construction and trades. Establishments that provide services related to construction of buildings and infrastructure, and other improvements to property. Such establishments include SIC Major Group Nos. 15 – 17, and SIC Industry Group No. 078, Landscape and horticultural services.
Construction cost per student, school. The estimated cost of construction of a permanent school facility in the district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
Conversion factor. A number that converts the water budget allowance from acre-inches per acre per year to gallons per square foot per year or cubic feet per year.
Cooperative. An entity with up to four members located in the domicile of one of the members, registered with the Washington State Liquor and Cannabis Board, and meeting the requirements under Chapter 69.51A RCW where qualifying patients and designated providers share responsibility for acquiring and supplying the resources needed to produce and process marijuana for medical use of members of the cooperative.
Cottage cluster. A cottage cluster, or “cluster” when referred to in the context of cottage housing, refers to all units oriented towards and within 25 feet of a shared yard.
Courtyard apartment. Up to four attached dwelling units arranged on two or three sides of a yard or court.
Critical aquifer recharge areas. Those areas in the City of Sammamish with a critical recharging effect on aquifers used for potable water as defined by WAC 365-190-0302. CARAs have prevailing geologic conditions associated with infiltration rates that create a high potential for contamination of groundwater resources or contribute significantly to the replenishment of groundwater. CARAs shall be classified based on the following criteria:
a. Class 1 CARAs include those areas located within the mapped one- or five-year capture zone of a wellhead protection area.
b. Class 2 CARAs include those areas located within the mapped 10-year capture zone of a wellhead protection area.
c. Class 3 CARAs include those areas outside wellhead protection areas that are identified as high aquifer recharge potential areas based on characteristics of surficial geology and soil types.
Critical area enhancement. The manipulation of the physical, chemical, or biological characteristics of a critical area to heighten, intensify, or improve specific function(s). Enhancement does not result in a gain in the size of a critical area.
Critical area restoration. Voluntary measures taken to restore an altered or damaged natural feature, including:
a. Active steps taken to restore damaged wetlands, streams, protected habitat, or their buffers to the functioning condition that existed prior to an unauthorized alteration; and
b. Actions performed to reestablish structural and functional characteristics of a critical area that have been lost by alteration, past management activities, or catastrophic events.
Critical areas. Those areas in the City that are geologically hazardous areas, including erosion hazard areas, landslide hazard areas, seismic hazard areas (WAC 365-190-120); frequently flooded areas; critical aquifer recharge areas; wetlands, streams; and fish and wildlife habitat conservation areas.
Critical facility. A facility necessary to protect the public health, safety, and welfare and that is defined under the occupancy categories of “essential facilities,” “hazardous facilities,” and “special occupancy structures” in the Uniform Building Code. Critical facilities also include nursing homes, public roadway bridges, and sites for hazardous substance storage or production, not including the temporary storage of consumer products containing hazardous substances intended for household use or for retail sale on the site.
Daily care. Medical procedures, monitoring and attention that are necessarily provided at the residence of the patient by the primary provider of daily care on a 24-hour basis.
Daycare. An establishment for group care of nonresident adults or children.
a. Daycare shall include only SIC Industry No. 835, Child daycare services, SIC Industry No. 8322, Adult daycare centers, and the following:
i. Adult daycare, such as adult day health centers or social daycare as defined by the Washington State Department of Social and Health Services;
ii. Nursery schools for children under minimum age for education in public schools;
iii. Privately conducted kindergartens or pre-kindergartens when not a part of a public or parochial school; and
iv. Programs covering after-school care for school children.
b. Daycare establishments are subclassified as follows:
i. Daycare I – a maximum of 12 adults or children in any 24-hour period; and
ii. Daycare II – over 12 adults or children in any 24-hour period.
DBH. The diameter of a tree as measured at breast height (54 inches above the ground).
Deciduous. A plant species with foliage that is shed annually.
Demolition. Removal of more than 50 percent of a structure. For residential buildings, the removal of more than 50 percent of exterior walls. A wall, or portion of a wall, is deemed “removed” when its structure is removed or moved to another location or elevation on site, or when the wall is enclosed behind newly constructed space.
Density credit, transfer (TDC). The ability to transfer potentially buildable dwelling units from an eligible sending site to an eligible receiving site as provided in this code.
Department. The City’s Department of Community Development.
Department and variety store. An establishment engaged in the retail sale of a variety of lines of merchandise, such as dry goods, apparel and accessories, home furnishings, housewares, including only uses located in SIC Major Group and Industry Nos.:
a. 53 – General merchandise;
b. 5947 – Gift, novelty, and souvenir shops; and
c. 5948 – Luggage and leather goods stores.
Designated accessible space. A WAC 51-50-005 required accessible parking space designated for the exclusive use of parking vehicles with a State Disabled Parking Permit.
Destination resort. An establishment for resource-based recreation and intended to utilize outdoor recreational opportunities, including related services, such as food, overnight lodging, equipment rentals, entertainment, and other conveniences for guests of the resort.
Detached housing. Stand-alone dwelling units in which individual units are contained within discrete structures. Examples include but are not limited to traditional single-family homes, detached accessory dwelling units, manufactured homes, and cottage housing.
Developer or “applicant.” The person or entity who owns or holds purchase options or other development control over property for which development activity is proposed. (See “Applicant.”)
Development. The construction or exterior expansion of structures or buildings; clearing or grading; paving, landscaping, or placing of obstructions; and any project of a permanent or temporary nature exterior to a building.
Development activity. Any residential construction or expansion of a building, structure or use, any change in use of a building or structure, or any change in the use of land that creates additional demand for school facilities.
Development or activity of a linear nature. One that usually involves multiple parcels and/or that runs along a corridor or pathway defined in an adopted plan. Linear development and activities may be straight, curved or a combination of both. Examples include roads, trails, sidewalks, utility corridors, and other transportation facilities such as bikeways and railroads.
Development proposal. Any activities requiring a permit or other approval from the City of Sammamish relative to the use or development of land.
Development proposal site. The legal boundaries of the parcel or parcels of land for which an applicant has or should have applied for authority from the City of Sammamish to carry out a development proposal.
Development regulation. The controls placed on development or land use activities by the City, including but not limited to zoning ordinances, critical areas ordinances, shoreline master program requirements, official controls, subdivision ordinances, and binding site plan ordinances, together with any amendments thereto. A development regulation does not include a decision to approve a project permit application, as defined in RCW 36.70B.020, even though the decision may be expressed in an ordinance by the City.
Development right. An interest in and the right under current law to use and/or subdivide a lot for any and all residential, commercial, and industrial purposes.
Director. The Director of the City of Sammamish Department of Community Development or his/her designee.
DNS. Determination of nonsignificance.
Dormitory. A residential building that provides sleeping for residents such as students or those belonging to a religious organization. The building does not contain separate dwelling units, except for those created for resident administrator habitation, and may include common dining, cooking, recreation, or bathing facilities.
Drip line. An area encircling the base of a tree, the minimum extent of which is delineated by a vertical line extending from the outer limit of a tree’s branch tips down to the ground.
Drop box facility. A facility used for receiving solid waste and recyclables from off-site sources into detachable solid waste containers, including the adjacent areas necessary for entrance and exit roads, unloading and vehicle turnaround areas. Drop box facilities normally service the general public with loose loads and may also include containers for separated recyclables.
Drug store. An establishment engaged in the retail sale of prescription drugs, nonprescription medicines, cosmetics and related supplies, including only uses located in SIC Industry Group and Industry Nos.:
a. 591 – Drug stores and proprietary stores;
b. 5993 – Tobacco stores and stands; and
c. 5999 – Cosmetics stores.
DS. Determination of significance.
Duplex. A residential building with two attached or stacked dwelling units.
Dwelling unit. One or more rooms designed for occupancy by a person or persons for living and sleeping purposes, containing kitchen facilities and rooms with internal accessibility, for use solely by the dwelling’s occupants.
Dwelling unit, apartment. A dwelling unit contained in a building consisting of two or more dwelling units that may be stacked, or one or more dwellings with nonresidential uses.
Dwelling unit, single detached. A detached building containing one dwelling unit.
Dwelling unit, townhouse. A building containing one dwelling unit that occupies space from the ground to the roof, and is attached to one or more other townhouse dwellings by common walls.
Earth station. A communication facility that transmits and/or receives signals to and from an orbiting satellite using satellite dish antennas.
EIS. Environmental impact statement.
Electric scooters and motorcycles. Any two- or three-wheeled vehicle that operates exclusively on electrical energy from an off-board source that is stored in the vehicle’s batteries and produces zero emissions or pollution when stationary or operating.
Electric vehicle. Any vehicle that operates, either partially or exclusively, on electrical energy from the grid, or an off-board source, that is stored on-board for motive purposes. “Electric vehicle” includes (but is not limited to): 1. a battery electric vehicle; 2. a plug-in hybrid electric vehicle; 3. a neighborhood electric vehicle; and 4. a medium-speed electric vehicle.
Electric vehicle charging station. A public or private parking space located together with battery charging station equipment that has as its purpose the transfer of electric energy (by conductive or inductive means) to a battery or other storage device in an electric vehicle.
Electric vehicle charging station – public. An electrical charging station that is 1. publicly owned and publicly available (e.g., park and ride lots, City Hall parking, other public lots) or privately owned and publicly available (e.g., shopping centers, apartment complexes, parking garages, etc.).
Electric vehicle charging station – restricted. An electrical charging station that is 1. privately owned and restricted access (e.g., single-family, assigned parking, etc. or 2. publicly owned and restricted (fleet parking with no access to the public).
Electric vehicle infrastructure. Structures, machinery, and equipment necessary and integral to support an electric vehicle, including battery charging stations and battery exchange stations.
Electric vehicle parking space. Any marked parking space (public or private) that identifies the use to be for an electric vehicle.
Electrical substation. A site containing equipment for the conversion of high voltage electrical power transported through transmission lines into lower voltages transported through distribution lines and suitable for individual users.
Emergency. An unforeseen occurrence during which there is imminent danger to the public health, safety, and welfare, or which poses an imminent risk to property, as a result of a natural or manmade catastrophe as so declared by the director.
Emergency housing. Temporary indoor accommodations for individuals or families who are homeless or at imminent risk of becoming homeless that is intended to address the basic health, food, clothing, and personal hygiene needs of individuals or families. Emergency housing may or may not require occupants to enter into a lease or an occupancy agreement.
Emergency shelter. A facility that provides a temporary shelter for individuals or families who are currently homeless. Emergency shelters may not require occupants to enter into a lease or an occupancy agreement. Emergency shelter facilities may include day and warming centers that do not provide overnight accommodations.
Energy resource recovery facility. An establishment for recovery of energy in a usable form from mass burning or refuse-derived fuel incineration, pyrolysis, or any other means of using the heat of combustion of solid waste.
Enhancement. An action that increases the functions and values of a stream, wetland, or other sensitive area or buffer.
Equipment, heavy. High-capacity mechanical devices for moving earth or other materials, and mobile power units including, but not limited to:
a. Carryalls;
b. Graders;
c. Loading and unloading devices;
d. Cranes;
e. Drag lines;
f. Trench diggers;
g. Tractors;
h. Augers;
i. Bulldozers;
j. Concrete mixers and conveyers;
k. Harvesters;
l. Combines; or
m. Other major agricultural equipment and similar devices operated by mechanical power as distinguished from manpower.
Erosion. The process by which soil particles are mobilized and transported by natural agents such as wind, rainsplash, frost action or surface water flow.
Erosion hazard areas. Those areas in the City underlain by soils that are subject to severe erosion when disturbed. Such soils include those on slopes 15 percent or more and mapped by the USDA as one of the following soil types:
a. The Alderwood gravelly sandy loam (AgD);
b. The Alderwood and Kitsap soils (AkF);
c. The Beausite gravelly sandy loam (BeD and BeF);
d. The Everett gravelly sandy loam (EvD);
e. The Kitsap silt loam (KpD);
f. The Ovall gravelly loam (OvD and OvF);
g. The Ragnar fine sandy loam (RaD); and
h. The Ragnar-Indianola Association (RdE).
Eutrophic. A trophic status characterized by moderately high algal productivity, more serious oxygen depletion in the bottom waters, some recreational use impairment, summer chlorophyll a concentration greater than 10 micrograms/liter, a summer Secchi depth of less than two meters, and a winter total phosphorus concentration greater than 20 micrograms/liter.
Evergreen. A plant species with foliage that persists and remains green year-round.
Examiner. The Hearing Examiner as established by SMC 21.09.020.
Existing corridors. Areas that have been previously cleared of native vegetation, have historically been used for transportation or recreation purposes, have currently little or low-quality vegetation and habitat value, or that contain improvements such as graded or filled areas. Examples include but are not limited to utility corridors, road or railroad rights-of-way, roadbeds and rail beds.
Existing grade. The existing elevation of land prior to any cuts and fills or other disturbances, which may, at the discretion of the Director, be determined by a topographic survey or soil sampling.
FAA. The Federal Aviation Administration.
Fabric shop. An establishment engaged in the retail sale of sewing supplies and accessories, including only uses located in SIC Industry Nos.:
a. 5949 – Sewing, needlework, and piece goods stores; and
b. Awning shops, banner shops, and flag shops found in 5999.
Facilities standard. The space required by grade span, and taking into account the requirements of students with special needs, which is needed in order to fulfill the educational goals of the school district as identified in the district’s capital facilities plan.
Factory-built commercial building. Any structure that is either entirely or substantially prefabricated or assembled at a place other than a building site, and designed or used for nonresidential human occupancy.
Fairground. A site permanently designated and improved for holding a county fair, as provided in Chapters 15.76 and 36.37 RCW, or for holding similar events, including, but not limited to:
a. Carnivals;
b. Circuses;
c. Expositions;
d. Animal shows; and
e. Exhibitions and/or demonstrations of farm and home products with accompanying entertainment and amusements.
Family. One or more persons, either related or unrelated, living together as a single housekeeping unit.
Farmers’ market. An outdoor market held in public spaces which allows farmers and other vendors to sell produce and other locally produced products directly to the public.
FCC. The Federal Communications Commission.
Feasible. That an action, such as a development project, mitigation, or preservation requirement, meets all of the following conditions:
a. The action can be accomplished with technologies and methods that have been used in the past in similar circumstances, or studies or tests have demonstrated in similar circumstances that such approaches are currently available, likely to achieve the intended results, and impacts to critical areas have been avoided, where applicable;
b. Any unavoidable critical area impacts can be adequately mitigated;
c. The action provides a reasonable likelihood of achieving its intended purpose;
d. The action does not physically preclude achieving the project’s primary intended legal use. In cases where these guidelines require certain actions unless they are infeasible, the burden of proving infeasibility is on the applicant. In determining an action’s infeasibility, the reviewing agency may weigh the action’s relative public costs and public benefits, considered in the short- and long-term time frames.
Feed lines. Cables used as the interconnecting media between the transmission/receiving base station and the antenna.
Feed store. An establishment engaged in retail sale of supplies directly related to the day to day activities of agricultural production.
Fence. A barrier for the purpose of enclosing space or separating lots, composed of:
a. Masonry or concrete walls, excluding retaining walls; or
b. Wood, metal, or concrete posts connected by boards, rails, panels, wire or mesh.
Financial guarantee. A form of financial security posted to ensure timely and proper completion of improvements, to ensure compliance with the interim Sammamish Development Code, and/or to warranty materials, workmanship of improvements, and design. Financial guarantees include assignments of funds, cash deposit, and surety bonds, and/or other forms of financial security acceptable to the Director. For the purposes of this chapter, the terms “performance guarantee,” “maintenance guarantee,” and “defect guarantee” are considered subcategories of financial guarantee.
Fish and wildlife habitat conservation areas. Those areas that serve a critical role in sustaining needed habitats and species for the functional integrity of the ecosystem, and which, if altered, may reduce the likelihood that the species will persist over the long term. These areas may include, but are not limited to, rare or vulnerable ecological systems, communities, and habitat or habitat elements including seasonal ranges, breeding habitat, winter range, and movement corridors; and areas with high relative population density or species richness. The City of Sammamish has designated locally important habitats and species in SMC 21.03.020.W.1.
Fish and wildlife habitat corridors. Those corridors set aside and protected for preserving connections between habitats on development proposal sites that contain streams and/or wetlands with a moderate to high habitat score greater than or equal to six on the Washington State Wetland Rating System for Western Washington (Department of Ecology 2014 or as revised) that are located within 200 feet of an on-site or off-site stream and/or wetland with a moderate to high habitat score greater than or equal to six on the Washington State Wetland Rating System for Western Washington. Fish and wildlife habitat corridors do not increase stream buffers, except as required to provide a connection between two features as described above.
Flag. A fabric sheet of square, rectangular or triangular shape which is mounted on a pole, cable or rope at one end.
Flag, government. Any flag or badge or insignia of the United States, state of Washington, King County, City of Sammamish, or official historic plaque of any governmental jurisdiction or agency.
Flood fringe. That portion of the floodplain outside of the zero-rise floodway that is covered by floodwaters during the base flood, generally associated with standing water rather than rapidly flowing water.
Flood hazard areas. Those areas in the City of Sammamish subject to inundation by the base flood and those areas subject to risk from channel relocation or stream meander including, but not limited to, streams, lakes, wetlands, and closed depressions.
Flood insurance rate map. The official map on which the Federal Insurance Administration has delineated some areas of flood hazard.
Flood insurance study for King County. The official report provided by the Federal Insurance Administration that includes flood profiles and the flood insurance rate map.
Flood protection elevation. An elevation that is one foot above the base flood elevation.
Floodplain. The total area subject to inundation by the base flood.
Floodproofing. Adaptations that will make a structure that is below the flood protection elevation substantially impermeable to the passage of water and resistant to hydrostatic and hydrodynamic loads including the impacts of buoyancy.
Floodway, zero-rise. The channel of a stream and that portion of the adjoining floodplain which is necessary to contain and discharge the base flood flow without any measurable increase in flood height. A “measurable increase in base flood height” means a calculated upward rise in the base flood elevation, equal to or greater than .01 foot, resulting from a comparison of existing conditions and changed conditions directly attributable to development in the floodplain. This definition is broader than that of the FEMA floodway, but always includes the FEMA floodway. The boundaries of the 100-year floodplain, as shown on the flood insurance study for King County, are considered the boundaries of the zero-rise floodway unless otherwise delineated by a sensitive area special study.
Floor to area ratio. A measure of development intensity which is determined by dividing gross floor area by lot area.
Florist shop. An establishment engaged in the retail sale of flowers and plants, including only uses located in SIC Industry Nos.:
a. 5992 – Florists; and
b. 5999 – Artificial flowers.
Footprint. A two-dimensional outline of a structure or building where it intersects or covers the ground surface, including upper story eaves and cantilevers where they cover or overhang the ground surface.
Forest practice. Any activity regulated by the Washington Department of Natural Resources in WAC Title 222 or Chapter 76.09 RCW for which a forest practice permit is required, together with:
a. Fire prevention, detection and suppression; and
b. Slash burning or removal.
Forest product sales. The sale of goods produced, extracted, consumed, gathered or harvested from a forest including, but not limited to:
a. Trees;
b. Wood chips;
c. Logs;
d. Fuel wood;
e. Cones;
f. Christmas trees;
g. Berries;
h. Herbs; or
i. Mushrooms.
Forest research. The performance of scientific studies relating to botany, hydrology, silviculture, biology and other branches of science in relation to management of forest lands, including only uses located in SIC Industry Nos.:
a. 8731 – Commercial physical and biological research;
b. 8733 – Noncommercial research organizations; and
c. 8734 – Testing laboratories.
Frequently flooded areas. Those lands in the City in the floodplain subject to a one percent or greater chance of flooding in any given year and those lands that provide important flood storage, conveyance, and attenuation functions, as determined by the City in accordance with WAC 365-190-0803. Frequently flooded areas perform important hydrologic functions and may present a risk to persons and property. Frequently flooded areas include all areas of special flood hazards within the jurisdiction of the City of Sammamish.
Fourplex. A residential building with four attached or stacked dwelling units.
Furniture and home furnishings store. An establishment engaged in the retail sale of household furniture and furnishings for the home, including only uses located in SIC Major Group and Industry Nos.:
a. 57 – Home furniture, furnishings, and equipment stores, except Industry Group No. 573; and
b. Baby carriages, cake decorating supplies, hot tubs, picture frames (ready-made), swimming pools (above-ground, not site-built), telephone stores and typewriter stores found in 5999.
General business service. An establishment engaged in providing services to businesses or individuals, with no outdoor storage or fabrication, including only uses located in SIC Major Group Nos.:
a. 60 – Depository institutions;
b. 61 – Nondepository credit institutions;
c. 62 – Security and commodity brokers, dealers, exchanges, and services;
d. 63 – Insurance carriers;
e. 65 – Real estate, except 653 (Real estate agents and directors);
f. 67 – Holding and other investment offices;
g. 7299 – Miscellaneous personal services, not elsewhere classified;
h. 73 – Business services, except Industry Group and Industry Nos.:
i. 7312 – Outdoor advertising services; and
i. 86 – Membership organizations, including administrative offices of organized religions found in 8661, but excluding churches and places of worship.
Geologist. A professional who holds a current geologist license from the Washington State Geologist Licensing Board.
Geotechnical engineer. A practicing geotechnical/civil engineer licensed as a professional civil engineer by the state of Washington who has at least four years of professional employment as a geotechnical engineer.
Golf course. A recreational facility, under public or private ownership, designed and developed for golf activities with accessory uses including, but not limited to:
a. A driving range;
b. Miniature golf;
c. Pro shops;
d. Caddyshack buildings;
e. Swimming pools, tennis courts and other related recreational facilities;
f. Restaurants;
g. Office and meeting rooms; and
h. Related storage facilities.
Grade span. The categories into which a district groups its grades of students; i.e., elementary, middle or junior high school, and high school.
Grading. Any excavation, filling, removing the duff layer or any combination thereof.
Grazing area. Any open land area used to pasture livestock in which suitable forage is maintained over 80 percent of the area at all times of the year.
Gross square footage, residential accessory structures. Gross square footage includes all gross area that is above grade. Any visible wall height of more than three feet shall count towards the gross building square footage.
Gross square footage, single-family residence. Gross square footage includes all gross area that is above grade including garages. Any visible wall height of more than three feet shall count towards the gross building square footage.
Groundcover. Living plants designed to grow low to the ground (generally one foot or less) and intended to stabilize soils and protect against erosion.
Habitable space. Space in a structure for human activity including living, sleeping, eating, cooking, working, shopping, or bathroom facilities. Habitable space excludes parking garages, self-service storage facilities, warehouses, display windows separated from retail activity, closets, halls, storage, or utility spaces, and similar areas.
Hardscape coverage. Any impervious surface, area covered with gravel or other material that is not vegetation, area that precludes the growth of vegetation, and areas under overhangs that exceed 18 inches.
Hazardous household substance. A substance as defined in RCW 70.105.010.
Hazardous substance. A substance as defined in RCW 70.105.010.
Hazardous trees. Those trees with a structural defect, combination of defects or disease resulting in a structural defect that, under the normal range of environmental conditions at the site, will result in the loss of a major structural component of the tree in a manner that will:
a. Damage a residential structure or accessory structure, place of employment or public assembly or approved parking for a residential structure or accessory structure or place of employment or public assembly;
b. Damage an approved road or utility facility; or
c. Prevent emergency access in the case of medical hardship.
Heavy equipment and truck repair. The repair and maintenance of self-powered, self-propelled, or towed mechanical devices, equipment, and vehicles used for commercial purposes, such as tandem axle trucks, graders, backhoes, tractor trailers, cranes, lifts, but excluding automobiles and pick-up trucks under 10,000 pounds, recreational vehicles, boats, and their trailers.
Hedge. A row of five or more trees of the same species, densely planted to provide a landscape barrier or screen, maintained with ongoing pruning and shearing.
Helistop. An area on a roof or on the ground used for the takeoff and landing of helicopters for the purpose of loading or unloading passengers or cargo but not including fueling service, hangers, maintenance or overhaul facilities.
High voltage electrical transmission tower. A structure that is designed and constructed primarily for the purpose of overhead support of high voltage transmission lines. For purposes of this term, “high voltage transmission lines” shall generally mean and refer to a 68 kV or greater electric transmission line.
Historic resource. A district, site, building, structure or object significant in national, state or local history, architecture, archaeology, and culture.
Hobby, toy, and game shop. An establishment engaged in the retail sale of toys, games, hobby and craft kits, including only uses located in SIC Industry Nos.:
a. 5945 – Hobby, toy and game shops; and
b. 5999 – Autograph and philatelist supply stores, coin shops, and stamps, philatelist-retail (except mail order).
Home business. A business or profession which is incidental to the use of a residential dwelling unit by a resident of the dwelling unit. Home businesses do not include uses where the use of the premises as a dwelling unit is secondary to the operation of the business or profession. In no case shall the area used for a home business exceed 50 percent of the area of the residential dwelling unit.
The home business use definition does not include other residential accessory uses identified in Chapter 21.05 SMC and defined in this section, including but not limited to:
b. Senior citizen assisted housing;
c. Daycare 1; and
d. Specialized instructional schools.
Home businesses are further subclassified as follows:
e. Home business, Type 1 – conducted within a building permitted within a residential zone and that will not result in odors nor obvious visible or audible business activity outside of the building. Type 1 home businesses are generally indistinguishable from other dwelling units in the vicinity.
f. Home business, Type 2 – conducted within a building permitted within a residential zone and that results in limited odors, and some obvious visible or audible business activity outside of the building. Type 2 home businesses may be characterized by the following types of activities: significantly increased deliveries beyond regular residential mail delivery activity; significantly increased client or customer visitation to the site; and/or visual or audible activity visible from adjacent properties or the street. Home businesses that cannot meet the standards established in SMC 21.05.020.E.4 for Type 1 home businesses, are Type 2 home businesses and subject to the standards of SMC 21.05.020.E.5. Home businesses engaged in a use that requires a federal or state license or permit, in addition to a business license, are Type 2 home businesses (example: home businesses engaged in the production of alcohol such that a liquor license is required).
Home size. The gross square footage of a single-family residence.
Homeless encampment. A site for a group of homeless persons temporarily residing on a site, either out of doors or in a building.
House front. The facade of the house that faces a street with a clearly defined main entrance and walkway.
House rear. The facade of the house that faces the rear lot line or in the case of a lot with double frontages, the portion of the house facing the secondary street.
House side. The facade of the house that faces a side lot line; or for a house on a corner lot the side facing the secondary street frontage without the main entrance or a walkway.
Household pets. Small animals that are kept within a dwelling unit.
Housemover. Any person, firm, or corporation engaged in the business of moving houses, buildings, structures, or other like object.
Hydroelectric generation facility. An establishment for the generation of electricity using water sources.
Hypereutrophic. A trophic status characterized by high algal productivity, intense algal blooms, fish kills due to oxygen depletion in the bottom waters, frequent recreational use impairment, summer chlorophyll a concentration greater than 10 micrograms/liter, a summer Secchi depth generally less than two meters, and a winter total phosphorus concentration greater than 30 micrograms/liter.
Imminent risk. A risk to public health, safety, welfare, or property with a high probability of occurring at any time; an active and ongoing risk. See “Emergency.”
Impervious surface. For purposes of this chapter, a hard surface area that either prevents or retards the entry of water into the soil mantle as under natural conditions before development; or that causes water to run off the surface in greater quantities or at an increased rate of flow compared to the flow present under natural conditions prior to development.
Improved public roadways. Public road rights-of-way that have been improved with at least two travel lanes and are maintained by either the City of Sammamish or the state of Washington.
Individual transportation and taxi. An establishment engaged in furnishing individual or small group transportation by motor vehicle, including only uses located in SIC Industry Group and Industry Nos.:
a. 412 – Taxicabs; and
b. 4119 – Local passenger transportation, not elsewhere classified.
Infiltration rate. The rate of water entry into the soil expressed in inches per hour.
Interested person. Any person who receives written notice of a proposed land use action under the requirements of the SMC, or has requested of the responsible City official or the Community Development Director notification of proceedings or copies of orders, reports, recommendations, or decisions issued in the particular case, or who participates in a hearing by providing evidence, comment, or argument, or who participates in a neighborhood meeting.
Interim recycling facility. A site or establishment engaged in collection or treatment of recyclable materials, which is not the final disposal site, and including:
a. Drop boxes;
b. Source-separated, organic waste processing facilities; and
c. Collection, separation and shipment of glass, metal, paper or other recyclables.
Interlocal agreement. A legal contract between two or more local jurisdictions (cities and counties) that specifies the conditions under which development rights may be transferred (typically from an unincorporated county into an incorporated city). Interlocal agreements must be endorsed by the legislative bodies of both jurisdictions.
Irrigation efficiency. The coefficient of the amount of water beneficially used divided by the amount of water applied. This coefficient is derived from actual measurements and an evaluation of the general characteristics of the type of irrigation system and management practices proposed.
Jail. A facility operated by a governmental agency, designed, staffed and used for the incarceration of persons for the purposes of punishment, correction and rehabilitation following conviction of an offense.
Jewelry store. An establishment engaged in the retail sale of a variety of jewelry products, including only uses located in SIC Industry Nos.:
a. 5944 – Jewelry stores; and
b. Gem stones and rock specimens found in 5999.
Joint use driveway. A jointly owned and/or maintained vehicular access to two residential properties.
Kennel. A place where adult dogs are temporarily boarded for compensation, whether or not for training. An adult dog is one of either sex, altered or unaltered, that has reached the age of six months.
Kitchen or kitchen facility. An area within a building intended for the preparation and storage of food and containing:
a. An appliance for the refrigeration of food;
b. An appliance for the cooking or heating of food; and
c. A sink.
Lake management plan. The plan (and supporting documents as appropriate) describing the lake management recommendations and requirements.
Lakes. An open body of surface water, not including streams or rivers, that is 20 acres or greater in total area.
Landfill. A disposal site or part of a site at which refuse is deposited.
Landscape water features. A pond, pool or fountain used as a decorative component of a development.
Landscaping. Live vegetative materials required for a development. Said materials provided along the boundaries of a development site are referred to as perimeter landscaping.
Landslide. Episodic downslope movement of a mass including, but not limited to, soil, rock or snow.
Landslide hazard areas. Those areas in the City of Sammamish potentially subject to risk of mass movement due to a combination of geologic, topographic, and hydrologic factors. These areas are typically susceptible to landslides because of a combination of factors including: bedrock, soil, slope gradient, slope aspect, geologic structure, groundwater, or other factors. Landslide hazard areas include the following:
a. Areas of historic failures, such as:
i. Those areas mapped by the Department of Ecology Coastal Zone Atlas or the Department of Natural Resources slope stability mapping as unstable (“U” or class 3), unstable old slides (“UOS” or class 4), or unstable recent slides (“URS” or class 5); or
ii. Areas designated as quaternary slumps, earthflows, mudflows, or landslides on maps published by the U.S. Geological Survey or Department of Natural Resources or as amended;
b. Areas that have shown movement during the Holocene epoch, from 10,000 years ago to the present, or which are underlain by mass wastage debris from that epoch;
c. Any area with all three of the following characteristics:
i. Slopes steeper than 15 percent; and
ii. Hillsides intersecting geologic contacts with a relatively permeable sediment overlying a relatively impermeable sediment or bedrock; and
iii. Springs or groundwater seepage;
d. Areas with a slope of 40 percent or steeper and with a vertical relief of 10 or more feet except areas composed of consolidated rock. A slope is delineated by establishing its toe and top, as defined in this section, and measured by averaging the inclination over at least 10 feet of vertical relief;
e. Slopes that are parallel or subparallel to planes of weakness (such as bedding planes, joint systems, and fault planes) in subsurface materials;
f. Slopes having gradients steeper than 80 percent subject to rock fall during seismic shaking;
g. Areas potentially unstable because of rapid stream incision, stream bank erosion or undercutting by wave action;
h. Landslide hazard areas do not include those areas composed of slopes greater than 40 percent that were created from a previously non-landslide hazard area through legal grading activity and that are confirmed to be stable by a qualified professional;
i. Unconsolidated glacial deposits subject to elevated groundwater levels after prolonged rainfall or rain-on-snow events as designation criteria for a landslide hazard area; and
j. Areas located in a canyon or an active alluvial fan, presently or potentially subject to inundation by debris flows or catastrophic flooding.
Least visually obtrusive profile. The design of a wireless communication facility intended to present a visual profile that is the minimum profile necessary for the facility to properly function.
Level of service (LOS), traffic. The City’s defined performance standards for its adopted concurrency intersections, road corridors, and road segments, as defined in the City’s Comprehensive Plan and development regulations.
Light equipment. Hand-held tools and construction equipment, such as chain saws, wheelbarrows, and post-hole diggers.
Liquor and Cannabis Board (LCB). The Washington State Liquor and Cannabis Board which carries out Washington liquor, marijuana, and tobacco laws and regulations.
Livestock. Grazing animals kept either in open fields or structures for training, boarding, home use, sales, or breeding and production, including but not limited to:
a. Cattle;
b. Riding and draft horses;
c. Hogs, excluding pigs weighing under 120 pounds and standing 20 inches or less at the shoulder that are kept as pets or small animals;
d. Sheep; and
e. Goats.
Livestock, large. Cattle, horses, and other livestock generally weighing over 500 pounds.
Livestock sales. The sale of livestock but not including auctions.
Livestock, small. Hogs, excluding pigs weighing under 120 pounds and standing 20 inches or less at the shoulder that are kept as household pets or small animals, sheep, goats, miniature horses, llamas, alpaca, and other livestock generally weighing under 500 pounds.
Loading space. A space for the temporary parking of a vehicle while loading or unloading cargo or passengers.
Lot. A physically separate and distinct parcel of property and on lakefront properties above ordinary high water mark, which has been created pursuant to SMC 21.02.060, Land Division, or state law.
Lot coverage. The amount of a lot that a building footprint may cover. Lot coverage is expressed as a percent of the total lot area that a building or buildings may cover; for example, a 45 percent lot coverage standard indicates that 45 percent of the area of a lot may be covered by a building or combination of buildings.
Lot line, front yard. The property boundary or property line abutting a street right-of-way. For property that does not abut a street right-of-way and abuts an access easement or private street the front yard is that property boundary or property line from which the lot gains primary access.
Lot line, interior. Lot lines that delineate property boundaries along those portions of the property that do not abut a street.
Lot line, rear yard. The property boundary or property line opposite the front yard lot line. Provided, lots with more than one front yard, or triangular shaped lots with three sides, shall have no rear yard lot line.
Lot line, side yard. The property boundary or property line that delineates the property boundaries along the side portion of the property.
Lot, parent. A lot which is subdivided into unit lots through the unit lot subdivision process.
Lot, unit. A subdivided lot, that allows up to one dwelling unit, created from a parent lot and approved through the unit lot subdivision process.
Low impact development (LID). A stormwater and land use management strategy that strives to mimic predisturbance hydrological processes of infiltration, filtration, storage, evaporation and transpiration by emphasizing conservation, use of on-site natural features, site planning, and distributed stormwater management practices that are integrated into a project design.
Maintenance. Those usual acts to prevent a decline, lapse or cessation from a lawfully established condition or use. Maintenance may include an activity that restores the character, scope, size, and design of a serviceable area, structure, or land use to its previously authorized and undamaged condition. Activities that change the character, size, or scope of a project beyond the original design; expand impervious surfaces; or drain, dredge, fill, flood, or otherwise alter critical areas are not included in this definition.
Managing agency. An organization that is responsible for organizing and managing a homeless encampment. (Note: The managing agency may be the same entity as the sponsor.)
Marijuana or “marihuana.” All parts of the plant Cannabis, whether growing or not, with a THC concentration greater than 0.3 percent on a dry weight basis; the seeds thereof; the resin extracted from any part of the plant; and every compound, manufacture, salt, derivative, mixture, or preparation of the plant, its seeds or resin. The term does not include the mature stalks of the plant, fiber produced from the stalks, oil or cake made from the seeds of the plant, any other compound, manufacture, salt, derivative, mixture, or preparation of the mature stalks (except the resin extracted therefrom), fiber, oil, or cake, or the sterilized seed of the plant which is incapable of germination.
Marijuana concentrates. Products consisting wholly or in part of the resin extracted from any part of the plant Cannabis and having a THC concentration greater than 10 percent.
Marijuana-infused products. Products that contain marijuana or marijuana extracts, are intended for human use, are derived from marijuana, and have a THC concentration no greater than 10 percent. The term “marijuana-infused products” does not include either marijuana concentrates or useable marijuana.
Marijuana processor. A person or entity licensed by the Washington State Liquor and Cannabis Board (“LCB”) to process marijuana into marijuana concentrates, useable marijuana and marijuana-infused products, package and label marijuana concentrates, useable marijuana and marijuana-infused products for sale in retail outlets, and sell marijuana concentrates, useable marijuana and marijuana-infused products at wholesale to marijuana retailers.
Marijuana producer. A person or entity licensed by the LCB to produce and sell marijuana at wholesale to marijuana processors and other marijuana producer.
Marijuana retailer. A person or entity licensed by the LCB to sell marijuana concentrates, useable marijuana, and marijuana-infused products in a retail outlet.
Marina. An establishment providing docking, moorage space and related activities limited to the provisioning or minor repair of pleasure boats and yachts; and accessory facilities including, but not limited to:
a. Showers;
b. Toilets; and
c. Self-service laundries.
Master telecommunications plan. A plan developed to establish public policy and applicable development standards related to the deployment of wireless telecommunications infrastructure.
Material error. Substantive information upon which a permit decision is based that is submitted in error or is omitted at the time of permit application.
Medium-speed electric vehicle. A self-propelled, electrically powered four-wheeled motor vehicle, equipped with a roll cage or crush-proof body design, whose speed attainable in one mile is more than 25 miles per hour but not more than 35 miles per hour and otherwise meets or exceeds the federal regulations set forth in 49 CFR 571.500.
Mesotrophic. A trophic status characterized by moderate algal productivity, oxygen depletion in the bottom waters, usually no recreational use impairment, summer chlorophyll a concentration averaging four to 10 micrograms/liter, a summer Secchi depth of two to five meters, and a winter total phosphorus concentration ranging from 10 to 20 micrograms/liter.
Microclimate. A climatic condition in a relatively small area, within a few feet above and below the Earth’s surface and within canopies of vegetation. Microclimates are affected by such factors as temperature, humidity, wind and turbulence, dew, frost, heat balance, evaporation, the nature of the soil and vegetation, the local topography, latitude, elevation, and season. Weather and climate are sometimes influenced by microclimatic conditions, especially by variations in surface characteristics.
Microwave. Electromagnetic waves with a frequency range of 300 megahertz (MHz) to 300 gigahertz (GHz).
Middle housing. Dwelling units that are compatible in scale, form, and character with single-family houses and contain two or more attached, stacked, or clustered homes including duplexes, triplexes, fourplexes, townhouses, stacked flats, courtyard apartments, and cottage housing.
Mitigation bank. A property that has been protected in perpetuity, and approved by appropriate City, state, and federal agencies expressly for the purpose of providing compensatory mitigation in advance of authorized impacts through restoration, creation, and/or enhancement of wetlands and, in exceptional circumstances, preservation of adjacent wetlands, wetland buffers, and/or other aquatic resources.
Mitigation banking. A system for providing compensatory mitigation in advance of authorized wetland impacts of development in the City in which credits are generated through restoration, creation, and/or enhancement of wetlands and, in exceptional circumstances, preservation of adjacent wetlands, wetland buffers, and/or other aquatic resources.
Mobile home. A structure transportable in one or more sections; that in the traveling mode is eight body feet or more in width or 32 body feet or more in length; or when erected on site is 320 square feet or more in area; built on a permanent chassis; designed to be used as a dwelling unit, with or without permanent foundation, when connected to the required utilities; which contains plumbing, heating, air-conditioning and electrical systems; and shall include any structure that meets all the requirements of this section, or of Chapter 296-150B WAC, except the size requirements for which the manufacturer voluntarily complies with the standards and files the certification required by the Department of Housing and Urban Development (HUD).
Mobile home park. A development with two or more improved pads or spaces designed to accommodate mobile homes.
Monitoring. Evaluating the impacts of development proposals on biologic, hydrologic, and geologic systems and assessing the performance of required mitigation through the collection and analysis of data for the purpose of understanding and documenting changes in natural ecosystems, functions and features including, but not limited to, gathering baseline data.
Monuments, tombstones, and gravestones sales. The retail sale of custom stonework products including only uses located in SIC Industry No. 5599, Monuments, finished to custom order, tombstones and gravestones finished.
Motor vehicle, boat, and mobile home dealer. An establishment engaged in the retail sale of new and/or used automobiles, motor homes, motorcycles, trailers, boats, or mobile homes, including only uses located in SIC Major Group and Industry Group Nos.:
a. 55 – Automotive dealers and gasoline service stations, except:
i. 553 – Auto and home supply stores;
ii. 554 – Gasoline service stations;
b. Aircraft dealers found in 5599;
c. 527 – Mobile home dealers; and
d. Yacht brokers found in 7389.
Mulch. Any material such as leaves, bark, straw left loose and applied to the soil surface to reduce evaporation.
Native vegetation. Vegetation comprised of plant species, other than noxious weeds, which are indigenous to the coastal region of the Pacific Northwest and that reasonably could have been expected to naturally occur on the site.
Neighborhood electric vehicle. A self-propelled, electrically powered four-wheeled motor vehicle whose speed attainable in one mile is more than 20 miles per hour and not more than 25 miles per hour and conforms to federal regulations 49 CFR 571.500.
Net buildable area. The “site area” less the following areas:
a. Areas within a project site that are required to be dedicated for public rights-of-way in excess of 60 feet in width;
b. Sensitive areas and their buffers to the extent they are required by the City to remain undeveloped;
c. Areas required for stormwater control facilities other than facilities that are completely underground, including but not limited to retention/detention ponds, biofiltration swales and setbacks from such ponds and swales;
d. Areas required by the City to be dedicated or reserved as on-site recreation areas;
f. Other areas, excluding setbacks, required by the City to remain undeveloped.
Nonconformance. Any use, improvement or structure established in conformance with the City’s rules and regulations in effect at the time of establishment that no longer conforms to the range of uses permitted in the site’s current zone or to the current development standards of the code due to changes in the code or its application to the subject property.
Nonelectric vehicle. Any motor vehicle that does not meet the definition of “electric vehicle.”
Noxious weed. Any plant that is highly destructive, competitive, or difficult to control by cultural or chemical practices, limited to those plants on the state noxious weed list contained in Chapter 16-750 WAC.
Off-street required parking lot. Parking facilities constructed to meet the off-street parking requirements of SMC 21.06.030 for land uses located on a lot separate from the parking facilities.
Oligotrophic. A trophic status characterized by low algal productivity, algal blooms are rare, water clarity is high, all recreational uses unimpaired, summer chlorophyll a concentration average less than four micrograms/liter, a summer Secchi depth greater than five meters, and a winter total phosphorus concentration ranging from zero to 10 micrograms/liter.
One and one-half story. A building with an uppermost story containing space completely within a sloping roof, with rafters meeting the exterior wall not more than two feet from the top plate of the story below, and broken only by dormers.
Open-work fence. A fence in which the solid portions are evenly distributed and constitute no more than 50 percent of the total surface area.
Ordinary high water mark. The mark found by examining the bed and banks of a stream, lake, or tidal water and ascertaining where the presence and action of waters are so common and long maintained in ordinary years as to mark upon the soil a vegetative character distinct from that of the abutting upland. In any area where the ordinary high water mark cannot be found, the line of mean high water shall substitute. In any area where neither can be found, the top of the channel bank shall substitute. In braided channels and alluvial fans, the ordinary high water mark or line of mean high water shall be measured so as to include the entire stream feature.
Organic materials management facility. A facility that manages organic materials through composting, anaerobic digestion, vermiculture, black soldier fly, or similar technologies.
Outdoor performance center. An establishment for the performing arts with open-air seating for audiences. Such establishments may include related services such as food and beverage sales and other concessions.
Overspray. Irrigation water applied beyond the landscape area.
Park. A developed or undeveloped site designed or developed for recreational use by the public including, but not limited to:
a. Indoor facilities, such as:
i. Gymnasiums;
ii. Swimming pools; or
iii. Activity centers;
b. Outdoor facilities, such as:
i. Playfields;
ii. Fishing areas;
iii. Picnic and related outdoor activity areas; or
iv. Approved campgrounds;
c. Areas and trails for:
i. Hikers;
ii. Equestrians;
iii. Bicyclists; or
iv. Off-road recreational vehicle users;
d. Recreation space areas required under SMC 21.02.030.I;
e. Play areas required under SMC 21.02.030.K; and
f. Facilities for on-site maintenance.
Park service area. An area established by the Department, within which the dedications of land and fees received from new residential developments for the benefit of residents within such service area.
Parking lot aisle. That portion of the off-street parking area used exclusively for the maneuvering and circulation of motor vehicles and in which parking is prohibited.
Parking lot unit depth. The linear distance within which one parking aisle is flanked by accessible rows of parking stalls as measured perpendicular to the parking aisle.
Parking space. An area accessible to vehicles, improved, maintained and used for the sole purpose of parking a motor vehicle.
Parking space angle. Reference line, generally the property line or center line of an aisle, at which motor vehicles are to be parked.
Partially developed. A lot or lots where a portion of the lot or lots has been improved with a single-family home and associated appurtenances consistent with the underlying zoning designation, and the remaining portion of the lot or lots is unimproved and retains additional development right(s).
Party. The applicant, proponent, or petitioner; the owner(s) of property subject to a hearing; the responsible City official; or any other City official with jurisdiction or review authority over a proposal or proceeding; or anyone who has notified the Department in writing requesting to be a party to the proceeding.
A property owner who has authorized another individual to act as an agent for the development of a parcel of property is not a party unless he or she requests the Community Development Director to be designated as such. Persons joining in or concurring with an appeal or petition are not parties unless they have separately filed the requisite documents and fees for an appeal or petition.
Party of record. A person who has submitted written comments, testified, asked to be notified or is the sponsor of a petition entered as part of the official City record on a specific development proposal.
Peak hour. The hour during the morning or afternoon with the highest traffic volumes for a particular roadway or intersection.
Permanent school facilities. Facilities of a school district with a fixed foundation that are not relocatable facilities.
Permanent supportive housing. Subsidized, leased housing with no limit on length of stay that prioritizes people who need comprehensive support services to retain tenancy and utilizes admissions practices designed to use lower barriers to entry than would be typical for other subsidized or unsubsidized rental housing, especially related to rental history, criminal history, and personal behaviors. Permanent supportive housing is paired with on-site or off-site voluntary services designed to support a person living with a complex and disabling behavioral health or physical health condition who was experiencing homelessness or was at imminent risk of homelessness prior to moving into housing to retain their housing and be a successful tenant in a housing arrangement, improve the resident's health status, and connect the resident of the housing with community-based health care, treatment, or employment services.
Person. Includes individuals, corporations, partnerships, other formal associations, and governmental agencies.
Personal medical supply store. An establishment engaged in the retail sale of eyeglasses, contact lenses, hearing aids, and artificial limbs, including only uses located in SIC Industry Nos.:
a. 5995 – Optical goods stores; and
b. 5999 – Hearing aids and orthopedic and artificial limb stores.
Pet shop. An establishment engaged in the retail sale of pets, small animals, pet supplies, or grooming of pets, including only uses located in SIC Industry No. 5999, Pet shops.
Phosphorus. Elemental phosphorus and shall be measured as total phosphorus.
Phosphorus concentration. The mass of phosphorus per liquid volume.
Phosphorus loading. The total mass of phosphorus per time basis.
Photographic and electronic shop. An establishment engaged in the retail sale of cameras and photographic supplies, and a variety of household electronic equipment, including only uses located in SIC Industry No.:
a. 5946 – Camera and photographic supply stores;
b. 5999 – Binoculars and telescopes;
c. 5731 – Radio, television, and consumer electronics stores; and
d. 5734 – Computer and computer software stores.
Plant associations of infrequent occurrence. One or more plant species of a landform type that does not often occur in the City because of the rarity of the habitat and/or the species involved or for other botanical or environmental reasons.
Plant factor. A factor that when multiplied by reference evapotranspiration estimates the amount of water used by plants.
Plug-in hybrid electric vehicle (PHEV). An electric vehicle that 1. contains an internal combustion engine and also allows power to be delivered to drive wheels by an electric motor; 2. charges its battery by connecting to the grid or other off-board electric source; 3. may additionally be able to sustain battery charge using an on-board internal-combustion-driven generator; and 4. has the ability to travel short distances powered entirely by electricity.
Potable water. Water suitable for human consumption.
Private. Solely or primarily for the use of residents or occupants of the premises; e.g., a noncommercial garage used solely by residents or their guests is a private garage.
Private stormwater management facility. A surface water control structure installed by a project proponent to retain, detain or otherwise limit runoff from an individual or group of developed sites specifically served by such structure.
Professional office. An office used as a place of business by licensed professionals, or persons in other generally recognized professions, which use training or knowledge of a technical, scientific, or other academic discipline as opposed to manual skills, and that does not involve outside storage or fabrication, or on-site sale or transfer of commodities, including only the following SIC Major Group and Industry Nos.:
a. 64 – Insurance agents, brokers and service;
b. 653 – Real estate agents and directors;
c. 7291 – Income tax return preparation services;
d. 81 – Legal services;
e. 871 – Engineering, architectural and surveying services;
f. 872 – Accounting, auditing and bookkeeping services; and
g. 874 – Management and public relations services.
Public agency. Any agency, political subdivision, or unit of local government of this state including, but not limited to, municipal corporations, special purpose districts and local service districts, any agency of the state of Washington, the United States or any state thereof or any Indian tribe recognized as such by the federal government.
Public agency animal control facility. A facility for the impoundment and disposal of stray or abandoned small animals.
Public agency archive. A facility for the enclosed storage of public agency documents or related materials, excluding storage of vehicles, equipment, or similar materials.
Public agency or utility office. An office for the administration of any governmental or utility activity or program, with no outdoor storage and including but not limited to uses located in SIC Major Group, Industry Group and Industry Nos.:
a. 91 – Executive, legislative, and general government, except finance;
b. 93 – Public finance, taxation, and monetary policy;
c. 94 – Administration of human resource programs;
d. 95 – Administration of environmental quality and housing program;
e. 96 – Administration of economic programs;
f. 972 – International affairs;
g. 9222 – Legal counsel and prosecution; and
h. 9229 – Public order and safety.
Public agency or utility yard. A facility for open or enclosed storage, repair, and maintenance of vehicles, equipment, or related materials owned by a public agency or public utility, excluding document storage.
Public agency training facility. An establishment or school for training state and local law enforcement, fire safety, National Guard or transit personnel and facilities including but not limited to:
a. Dining and overnight accommodations;
b. Classrooms;
c. Shooting ranges;
d. Auto test tracks; and
e. Fire suppression simulations.
Qualified professional. A person with experience and training in the applicable field or critical area. A qualified professional must have obtained a B.S. or B.A. or equivalent degree in biology, engineering, environmental studies, fisheries, geomorphology or a related field, and two years of related work experience.
a. A qualified professional for watercourses, wetlands, and wildlife habitat conservation areas must have a degree in biology or a related field and relevant professional experience.
b. A qualified professional for preparing geotechnical reports and geotechnical design recommendations for erosion hazard areas must be a civil engineer with geotechnical certification licensed by the state of Washington. Where specified in code, a qualified professional for preparing geotechnical reports and geotechnical design recommendations for landslide hazard areas must be both a geotechnical engineer with a professional civil engineering license and a licensed geologist, licensed by the state of Washington, or geotechnical reports and geotechnical design recommendations must be prepared jointly by a licensed geotechnical engineer with a professional civil engineering license and a licensed geologist, licensed by the state of Washington.
c. A qualified professional for preparing critical aquifer recharge reports must be a professional hydrogeologist or geologist licensed in the state of Washington.
Rapid charging station. An industrial grade electrical outlet that allows for faster recharging of electric vehicle batteries through higher power levels and that meets or exceeds applicable state and federal standards.
Reasonable alternative. In determining what is a “reasonable alternative” to a proposed development, alteration or activity, the Department may consider the purpose, effectiveness, engineering feasibility, commercial availability of technology, best management practices, safety and cost of the alternative action or proposal. Reasonable alternatives are those that are capable of being carried out, taking into consideration the overall project purposes, needs and objectives.
Reasonable use. A legal concept articulated by federal and state courts in regulatory taking cases.
Receiving site. Those lots where the procurement of development rights enables a permissible change in the allowed intensity on the property pursuant to SMC 21.06.070 and all other controlling policies and law.
Recreational vehicle (RV). A vehicle designed primarily for recreational camping, travel, or seasonal use that has its own motive power or is mounted on or towed by another vehicle, including but not limited to:
a. Travel trailer;
b. Folding camping trailer;
c. Park trailer;
d. Truck camper;
e. Motor home; and
f. Multi-use vehicle.
Recreational vehicle parks. The use of land upon which two or more recreational vehicle sites, including hook-up facilities, are located for occupancy by the general public of recreational vehicles as temporary living quarters for recreation or vacation purposes.
Recyclable material. A nontoxic, recoverable substance that can be reprocessed for the manufacture of new products.
Reference evapotranspiration (Eto). A standard measurement of environmental parameters that affect the water use of plants.
Regional stormwater management facility. A surface water control structure installed in or adjacent to a stream or wetland of a basin or sub-basin by the surface water management (SWM) division. Such facilities protect downstream areas identified by SWM as having previously existing or predicted significant regional basin flooding or erosion problems.
Regional utility corridor. A right-of-way tract or easement other than a street right-of-way that contains transmission lines or pipelines for utility companies. Right-of-way tracts or easements containing lines serving individual lots or developments are not regional utility corridors.
Religious organization. The federally protected practice of a recognized religious assembly, school, or institution that owns or controls real property.
Relocatable facilities cost per student. The estimated cost of purchasing and siting a relocatable facility in a school district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
Relocatable facility. Any factory-built structure, transportable in one or more sections that is designed to be used as an education space and is needed to prevent the overbuilding of school facilities, to meet the needs of service areas within a district or to cover the gap between the time that families move into new residential developments and the date that construction is completed on permanent school facilities.
Responsible City official. The City of Sammamish official who has primary responsibility for coordinating the review of an application or appeal, or who issued the decision or recommendation, or took the action, which is the subject of the proceeding.
Retail, comparison. Provides for the sale of comparison goods and services and is centrally located in the community.
Retail, convenience. Provides for daily living goods, is easy to access and use and is close to residential neighborhoods.
Retaining wall. Any wall used to resist the lateral displacement of any material.
Riparian area. The area adjacent to flowing or standing freshwater aquatic systems. Riparian habitat encompasses the area beginning at the ordinary high water mark and extends to that portion of the terrestrial landscape that is influenced by, or that directly influences, the aquatic ecosystem. In riparian systems, the vegetation, water tables, soils, microclimate, and wildlife inhabitants of terrestrial ecosystems are often influenced by perennial or intermittent water. Simultaneously, adjacent vegetation, nutrient and sediment loading, terrestrial wildlife, as well as organic and inorganic debris, influence the biological and physical properties of the aquatic ecosystem. Riparian habitat includes the entire extent of the floodplain and riparian areas of wetlands that are directly connected to stream courses or other freshwater.
Runoff. Water not absorbed by the soil in the landscape area to which it is applied.
Salmonid. A member of the fish family Salmonidae, including:
a. Chinook, coho, chum, sockeye and pink salmon;
b. Rainbow, steelhead and cutthroat salmon;
c. Brown trout;
d. Brook and Dolly Varden char;
e. Kokanee; and
f. Whitefish.
Satellite public agency or utility yard. A small facility for open or enclosed storage and limited maintenance of vehicles or equipment used to maintain specific neighborhoods, parks, or areas of the City.
School bus base. An establishment for the storage, dispatch, repair, and maintenance of coaches and other vehicles of a school transit system.
School district. Any school district whose boundaries include the City of Sammamish.
School district support facility. Uses (excluding schools and bus bases) that are required for the operation of a school district. This term includes school district administrative offices, centralized kitchens, and maintenance or storage facilities.
Schools, elementary, and middle/junior high. Institutions of learning offering instruction in the several branches of learning and study required by the Education Code of the state of Washington in grades kindergarten through nine, including associated meeting rooms, auditoriums and athletic facilities.
Schools, secondary or high school. Institutions of learning offering instruction in the several branches of learning and study required by the Education Code of the state of Washington in grades nine through 12, including associated meeting rooms, auditoriums and athletic facilities.
Security or floodlighting fixtures. Generally intended to provide lighting that is designed and used to discourage crime and undesirable activity. Security or floodlighting fixtures are characterized by a broad intense beam of artificial light directed to illuminate a large area of a site.
Seismic hazard areas. Those areas determined to have susceptibility to liquefaction, surface rupture, seismically induced landslides, or lateral spreading as determined by a geotechnical investigation, or mapped as moderate to high and high liquefaction susceptibility and peat deposits on the Liquefaction Susceptibility Map of King County, Washington, Washington Division of Geology and Earth Sciences, OFR 2004-20, Palmer et al., September, 2004, as revised.
Self-service storage facility. An establishment containing separate storage spaces that are leased or rented as individual units.
Sending site. Designated lot or lots with development rights which landowners may sell in exchange for placing a conservation easement on the property or a portion of the property.
Senior assisted housing. Housing in a building consisting of two or more dwelling units or sleeping units restricted to occupancy by at least one senior per unit, and including the following support services:
a. Food preparation and dining areas;
b. Group activity areas;
c. Medical supervision; and
d. Similar activities.
Senior-oriented housing without these services is considered a type of co-housing.
Senior citizen. A person aged 62 or older.
Setback. The minimum required distance between a structure or a building and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures or buildings.
Setback, detached accessory dwelling unit. The minimum required distance between a detached accessory dwelling unit and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures.
Setback, single detached dwelling unit. The minimum required distance between a single detached dwelling unit and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures.
Setback, structure. The minimum required distance between a structure and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures or buildings.
Shelters for temporary placement. Housing units within the City that provide housing to persons on a temporary basis for a duration not to exceed four weeks.
Sign. Any device, structure, fixture, or placard that is visible from a public right-of-way or surrounding properties and uses graphics, symbols, or written copy for the purpose of advertising or identifying any establishment, product, goods, or service.
Sign, A-frame. A freestanding, two-panel, foldable, portable temporary sign made of rigid material.
Sign, awning. A sign painted on or attached directly to and supported by an awning. An awning may be constructed of rigid or nonrigid materials and may be retractable or nonretractable.
Sign, commercial. A sign erected for a business transaction or advertising the exchange of goods and services.
Sign, community banner. A temporary sign, located on City banner poles, which advertises an event that would provide civic, cultural, educational, philanthropic, or service opportunities hosted or promoted by the City or a community group that is not-for-profit or nonprofit and nonpolitical with an IRS designation of Section 501c. or d.
Sign, directional. A sign that is primarily designed to guide or direct pedestrian or vehicular traffic to an area, business, place, or convenience, and may include incidental graphics such as trade names and trademarks.
Sign, freestanding. A permanent sign fixed directly to the ground, or having one or more supports fixed directly to the ground, and being detached from any building or fence.
Sign, fuel price. A manually or electronically controlled sign utilized to advertise the price of gasoline and/or diesel fuel.
Sign, incidental. A sign, emblem or decal designed to inform the public of goods, facilities, or services available on the premises, and may include but not be limited to signs designating:
a. Restrooms;
b. Hours of operation;
c. Acceptable credit cards;
d. Property ownership or management;
e. Phone booths; and
f. Recycling containers.
Sign, indirectly illuminated. A sign that is illuminated entirely from an external artificial source.
Sign, monument. A freestanding sign that is above ground level and is anchored to the ground by a solid base, with no open space between the sign and the ground.
Sign, noncommercial. Any sign that is not a commercial sign. This definition also includes signs regarding fund raising or membership drive activities for noncommercial or nonprofit entities or groups.
Sign, off-premises directional. A sign that contains no advertising of a commercial nature that is used to direct pedestrian or vehicular traffic circulation to a facility, service, or business located on other premises within 660 feet of the sign.
Sign, on-premises. A sign that displays a message that is incidental to and directly associated with the use of the property on which it is located.
Sign, permanent. Any sign which is intended to be lasting and is constructed from an enduring material such as masonry and metal which remains unchanged in position, character, and condition (beyond normal wear), and is permanently affixed to the ground, wall or building, provided the sign is listed as a permanent sign in the ordinance.
Sign, permanent residential development identification. A permanent sign identifying the residential development upon which the sign is located.
Sign, pole. A freestanding sign having one or more supports standing directly upon the ground, and being detached from any building or fence.
Sign, portable. A sign that is capable of being moved and is not permanently affixed to the ground, a structure, or building.
Sign, projecting. Any sign that is attached to and supported by the exterior wall of a building with the exposed face of the sign on a plane perpendicular to the wall of the building, projecting more than one foot from the wall of a building and vertical to the ground.
Sign, temporary. Any sign, banner, pennant, or valance not permanently attached to the ground, wall or building, intended to be displayed for a limited period of time only.
Sign, wall. Any sign painted on, or attached directly to and supported by, the wall of a building or structure. All wall signs are building-mounted signs.
Sign, window. Any sign applied to or mounted on a window.
Site. A single lot, or two or more contiguous lots that are under common ownership or documented legal control, used as a single parcel for a development proposal in order to calculate compliance with the standards and regulations of this chapter.
Site area. The total horizontal area of a project site, less the following:
a. Areas below the ordinary high water mark;
b. Areas that are required to be dedicated on the perimeter of a project site for public rights-of-way.
Site cost per student. The estimated cost of a site in the district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
SITUS file. Information on an individual parcel of land, including its size, known extent of existing development, known environmental constraints, approval conditions and other site-specific information; a SITUS file is a King County file.
Source-separated organic material. Vegetative material, scrap lumber or wood, or other materials that provide a source for recycled or composted products. This does not include chemically treated wood products and/or toxic organic substances.
Special use permit. A permit granted by the City to locate a regional land use at a particular location, subject to conditions placed on the proposed use to ensure compatibility with adjacent land uses.
Specialized instruction school. Establishments engaged in providing specialized instruction in a designated field of study, rather than a full range of courses in unrelated areas; including, but not limited to:
a. Art;
b. Dance;
c. Music;
d. Cooking;
e. Driving; and
f. Pet obedience training.
Specified sexual activities. Human genitalia in a state of sexual stimulation or arousal; acts of human masturbation, sexual intercourse or sodomy; or erotic fondling, touching or display of human genitalia, pubic region, buttock, or female breast.
Sponsor. An entity that is hosting a homeless encampment on property it owns or controls and that serves as a liaison with the surrounding community.
Sporting goods store. An establishment engaged in the retail sale of sporting goods and equipment, including only uses located in SIC Industry Nos.:
a. 5941 – Sporting goods stores and bicycle shops; and
b. 5999 – Tent shops and trophy shops.
Sports club. An establishment engaged in operating physical fitness facilities and sports and recreation clubs, including only uses located in SIC Industry Nos.:
a. 7991 – Physical fitness facilities; and
b. 7997 – Membership sports and recreation clubs.
Stacked flat. Dwelling units in a residential building in which each floor may be separately rented or owned.
Stacked housing. Vertical residential building configuration with two or more dwelling units in which each floor may be separately rented or owned. Examples include vertically stacked duplexes, triplexes, fourplexes, sixplexes, or other mutliplex structures with at least one unit per floor.
Stable. A structure or facility in which horses or other livestock are kept for:
a. Boarding;
b. Training;
c. Riding lessons;
d. Breeding;
e. Rental; or
f. Personal use.
Standard of service, school districts. The standard adopted by each school district that identifies the program year, the class size by grade span and taking into account the requirements of students with special needs, the number of classrooms, the types of facilities the district believes will best serve its student population, and other factors as identified by the school district. The district’s standard of service shall not be adjusted for any portion of the classrooms housed in relocatable facilities that are used as transitional facilities or for any specialized facilities housed in relocatable facilities. Except as otherwise defined by the school board pursuant to a board resolution, “transitional facilities” shall mean those facilities that are used to cover the time required for the construction of permanent facilities; provided, that the “necessary financial commitments” as defined in SMC 21.06.040 are in place to complete the permanent facilities called for in the capital plan.
Steep slope hazard areas. Those landslide hazard areas in the City on slopes 40 percent or steeper within a vertical elevation change of at least 10 feet. A slope is delineated by establishing its toe and top and is measured by averaging the inclination over at least 10 feet of vertical relief. For the purpose of this definition:
a. The toe of a slope is a distinct topographic break in slope that separates slopes inclined at less than 40 percent from slopes 40 percent or steeper. Where no distinct break exists, the toe of a steep slope is the lowermost limit of the area where the ground surface drops 10 feet or more vertically within a horizontal distance of 25 feet; and
b. The top of a slope is a distinct, topographic break in slope that separates slopes inclined at less than 40 percent from slopes 40 percent or steeper. Where no distinct break exists, the top of a steep slope is the uppermost limit of the area where the ground surface drops 10 feet or more vertically within a horizontal distance of 25 feet.
c. A distinct topographic break occurs when the change in gradient is less than five feet vertically within a horizontal distance of 25 feet.
STEP housing. Collectively refers to emergency shelter, transitional housing, emergency housing, and permanent supportive housing.
Stream functions. Natural processes performed by streams including functions that are important in facilitating food chain production, providing habitat for nesting, rearing, and resting sites for aquatic, terrestrial, and avian species, maintaining the availability and quality of water, such as purifying water, acting as recharge and discharge areas for groundwater aquifers, moderating surface and stormwater flows and maintaining the free flowing conveyance of water, sediments, and other organic matter.
Streams. Those areas in the City where surface waters meet the criteria contained within WAC 222-16-030 and produce a defined channel or bed, not including irrigation ditches, canals, storm or stormwater runoff conveyance devices or other entirely artificial watercourses, unless they contain fish habitat or are used to convey streams naturally occurring prior to construction of such watercourses. For the purpose of this definition, a defined channel or bed is an area that demonstrates clear evidence of the passage of water and includes, but is not limited to, bedrock channels, gravel beds, sand and silt beds, and defined-channel swales. The channel or bed need not contain water year-round. For the purpose of defining the following categories of streams, normal rainfall is rainfall that is at or near the mean of the accumulated annual rainfall record, based upon the water year for King County as recorded at the Seattle-Tacoma International Airport.
a. Streams shall be classified according to the following criteria:
i. Type S streams are all streams inventoried as “shorelines of the state” under the City’s shoreline master program.
ii. Type F streams are segments of natural waters other than Type S waters, which are within the bankfull widths of defined channels and periodically inundated areas of their associated wetlands, or within lakes, ponds, or impoundments having a surface area of 0.5 acre or greater at seasonal low water and which in any case contain fish habitat as defined in WAC 222-16-030 (and WAC 222-16-031 as adopted by reference). Streams of special significance are those perennial reaches designated by the City based on historic fish presence and/or the probability of restoration of the following:
a) George Davis Creek;
b) Ebright Creek;
c) Pine Lake Creek; and
d) Laughing Jacobs Creek, below Laughing Jacobs Lake.
iii. Type Np streams are all segments of natural waters within the bankfull width of defined channels that are perennial nonfish habitat streams. Perennial streams are flowing waters that do not go dry any time of a year of normal rainfall and include the intermittent dry portions of the perennial channel below the uppermost point of perennial flow (WAC 222-16-030). If the uppermost point of perennial flow cannot be identified with simple, nontechnical observations, then the point of perennial flow should be determined using the best professional judgment of a qualified professional.
iv. Type Ns streams are all segments of natural waters within the bankfull width of the defined channels that are not Type S, F, or Np waters. These are seasonal, nonfish habitat streams in which surface flow is not present for at least some portion of a year of normal rainfall and are not located downstream from any stream reach that is a Type Np water. Ns waters must be physically connected by an above-ground channel system to Type S, F, or Np waters (WAC 222-16-030).
Street. A public or recorded private thoroughfare providing pedestrian and vehicular access through neighborhoods and communities and to abutting property.
Street frontage. Any portion of a lot or combination of lots that directly abuts a public right-of-way.
Street, primary. A primary street is the street with a higher street classification such as an arterial or collector street. Lots with two frontages on streets of the same classification may choose either street as the primary street frontage.
Structure. Anything permanently constructed in or on the ground, or over the water, excluding fences six feet or less in height, uncovered decks less than 18 inches above grade, uncovered paved areas, and structural or nonstructural fill.
Student factor. The number derived by a school district to describe how many students of each grade span are expected to be generated by a dwelling unit. Student factors shall be based on district records of average actual student generated rates for new developments constructed over a period of not more than five years prior to the date of the fee calculation; if such information is not available in the district, data from adjacent districts, districts with similar demographics, or countywide averages must be used. Student factors must be separately determined for single-family and multifamily dwelling units, and for grade spans.
Submerged land. Any land at or below the ordinary high water mark.
Substantial improvement. Any maintenance, repair, structural modification, addition, or other improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure either before the maintenance, repair, modification or addition is started or before the damage occurred, if the structure has been damaged and is being restored.
TDR certificate. A form of currency that represents development rights available for sale and use.
TDR certificate of intent. A document issued to a landowner upon approval of a TDR sending site application. The letter contains a determination of the number of development rights calculated for the sending site and an agreement by the City to issue a corresponding number of TDR certificates in exchange for a conservation easement. The sending site owner may use the TDR certificate letter of intent to market development rights to potential purchasers, but the letter of intent document has no value itself and cannot be transferred or used to obtain increased development rights within receiving areas.
TDR program. A market-based program that permanently conserves lands with important public benefits by establishing a means to transfer development rights from eligible sending sites to eligible receiving sites through a voluntary process that fairly compensates landowners while providing a public benefit for communities.
TDR sending site application. An application that a sending site landowner must file in order to be eligible for consideration for designation as a TDR sending site.
Temporary use permit. A permit to allow a use of limited duration and/or frequency, or to allow multiple related events over a specified period.
Theater. An establishment primarily engaged in the indoor exhibition of motion pictures or of live theatrical presentations.
Theatrical production services. An establishment engaged in uses located in SIC Industry No. 792, Theatrical producers (except motion picture), bands, orchestras, and entertainers, except establishments primarily engaged in providing live theatrical presentations, such as road companies and summer theaters.
Tightline sewer. A sewer trunk line designed and intended specifically to serve only a particular facility or place, and whose pipe diameter should be sized appropriately to ensure service only to that facility or place. It may occur outside the local service area for sewers, but does not amend the local service area.
Tiny houses. Including tiny houses on wheels, are defined as dwellings to be used as permanent housing with permanent provisions for living, sleeping, eating, cooking, and sanitation built in accordance with the State Building Code.
Total phosphorus. The phosphorus concentration as determined by a state-certified analytical laboratory using EPA 365.3 or SM 4500-P-B, E or an equivalent method.
Townhouses. Buildings that contain three or more attached single-family dwelling units that extend from foundation to roof and that have a yard or public way on not less than two sides.
Trails. Manmade pathways designed and intended for use by pedestrians, bicyclists, equestrians, and/or recreational users. Trails may be paved or unpaved, and may be intended and constructed for transportation, recreation, and nature contact and enjoyment. Types of trails are described and defined in the park and recreation plan, trails, bikeways and paths plan, or elsewhere in the city Comprehensive Plan.
Transfer of development rights (TDR). The transfer of the right to develop or build from sending sites to receiving sites.
Transfer station. A staffed collection and transportation facility used by private individuals and route collection vehicles to deposit solid waste collected off-site into larger transfer vehicles for transport to permanent disposal sites, and may also include recycling facilities involving collection or processing for shipment.
Transit bus base. An establishment for the storage, dispatch, repair and maintenance of coaches, light rail trains, and other vehicles of a public transit system.
Transit stop, existing. An existing public transit stop identified in the City’s Transportation Master Plan or Citywide Transit Plan.
Transit stop, planned. A planned public transit stop identified in the City’s Transportation Master Plan or Citywide Transit Plan.
Transitional housing. A project that provides housing and supportive services to homeless persons or families and that has as its purpose facilitating the movement of homeless persons and families into independent living, generally in less than two years.
Transitional housing facilities. Housing units within the City owned by public housing authorities, nonprofit organizations or other public interest groups that provide housing to persons on a temporary basis for a duration not to exceed 24 months in conjunction with job training, self sufficiency training, and human services counseling, the purpose of which is to help persons make the transition from homelessness to placement in permanent housing.
Transportation system management (TSM). Low-cost projects that can be implemented in a short time frame designed to increase the efficiency of existing transportation facilities. This also includes transit and/or ride sharing measures to decrease single occupancy vehicle trips.
Tree, heritage. A tree that is equal to or greater than 22 inches DBH.
Tree, landmark. A tree that is equal to or greater than 32 inches DBH.
Tree, significant. A tree that is in a healthy condition and is a noninvasive species, including those trees defined as a heritage tree and landmark tree, that is:
a. A coniferous tree with a diameter of eight inches or more DBH; or
b. A deciduous tree with a diameter of 12 inches or more DBH.
Triplex. A residential building with three attached or stacked dwelling units.
Trophic state index. A classification system which uses algal biomass as the basis for classification which can be independently measured by chlorophyll a, Secchi depth, and total phosphorus concentration.
Trophic status. A classification which defines lake quality by the degree of biological productivity.
Ultimate roadway section. A designation by the City that the maximum roadway or intersection capacity has been reached and further right-of-way acquisition and/or improvements are not feasible to increase peak hour vehicle capacity.
Underground injection control (UIC) well. A well that is used to discharge fluids from the ground surface into the subsurface and is one of the following:
a. A bored, drilled or driven shaft, or dug hole whose depth is greater than the largest surface dimension; or
b. A dug hole whose depth is greater than the largest surface dimension; or
c. An improved sinkhole; which is a natural crevice that has been modified; or
d. A subsurface fluid distribution system which includes perforated pipes, drain tiles or other similar mechanisms intended to distribute fluids below the surface of the ground.
Examples of UIC wells or subsurface infiltration systems include:
Drywells;
On-site septic drainfields;
Infiltration trenches with perforated pipe;
Storm chamber systems with the intent to infiltrate;
French drains;
Bioretention systems intending to infiltrate water from a perforated pipe below the treatment soil; and
Other similar devices that discharge to the ground.
Underground storage tank (UST). A tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground and is used for the storage of hazardous substances. USTs are generally associated with industrial/commercial land uses and can be found at filling stations, airports, hospitals, automotive repair shops, industrial plants, residential areas and other facilities. The definition of UST does not include underground facilities for the storage or treatment of stormwater or for the storage of nonhazardous substances, such as drinking water.
Unit density. The number of dwelling units allowed on a lot, regardless of lot size.
Unit lot subdivision. A subdivision process by which boundary lines and use areas are defined within a larger “parent” lot to establish individual sellable lots, allowing for the creation of fee simple lots.
Use. Activity or function carried out on an area of land, or in a building or structure located thereon. Any use subordinate or incidental to the primary use on a site is considered an accessory use.
Utility facility. A facility for the distribution or transmission of services to an area, including, but not limited to:
a. Telephone exchanges;
b. Water pumping or treatment stations;
d. Water storage reservoirs or tanks;
e. Municipal groundwater well-fields;
g. Natural gas gate stations and limiting stations;
h. Propane, compressed natural gas and liquefied natural gas storage tanks serving multiple lots or uses from which fuel is distributed directly to individual users;
i. Sewer lift stations; and
j. Pipes, electrical wires and associated structural supports.
Vactor waste. Liquid or solid waste material collected from catch basins, retention/detention facilities or drainage pipes.
Vactor waste receiving facility. A facility where vactor waste is brought for treatment and storage prior to final disposal.
Variance. An adjustment in the application of standards of a zoning code to a particular property.
Vegetation. Any and all plant life growing at, below or above the soil surface.
Vocational school. Establishments offering training in a skill or trade to be pursued as a career, including only uses located in SIC Industry Group Nos.:
a. 824 – Vocational schools; and
b. 8222 – Technical institutes.
Warehousing and wholesale trade. Establishments involved in the storage and/or sale of bulk goods for resale or assembly, excluding establishments offering the sale of bulk goods to the general public that is classified as a retail use in SMC 21.05.010.S. These establishments shall include only SIC Major Group Nos. 50 and 51 and SIC Industry Group Nos. 422 and 423.
Wastewater treatment facility. A plant for collection, decontamination, and disposal of sewage, including residential, industrial, and agricultural liquid wastes, and including any physical improvement within the scope of the definition of “water pollution control facility” set forth in WAC 173-90-0154, as amended.
Water budget. The upper limit of irrigation water applied to the established landscape area.
Water-dependent use. A use or portion of a use which cannot exist in a location that is not adjacent to the water and which is dependent on the water by reason of the intrinsic nature of its operations.
Water-enjoyment use. A recreational use or other use that facilitates public access to the shoreline as a primary characteristic of the use; or a use that provides for recreational use or aesthetic enjoyment of the shoreline for a substantial number of people as a general characteristic of the use and which, through location, design, and operation, ensures the public’s ability to enjoy the physical and aesthetic qualities of the shoreline. In order to qualify as a water-enjoyment use, the use must be open to the general public and the shoreline-oriented space within the project must be devoted to the specific aspects of the use that fosters shoreline enjoyment.
Water-oriented use. A use that is water-dependent, water-related, or water-enjoyment, or a combination of such uses.
Water-related use. A use or portion of a use which is not intrinsically dependent on a waterfront location but whose economic viability is dependent upon a waterfront location because:
a. The use has a functional requirement for a waterfront location such as the arrival or shipment of materials by water or the need for large quantities of water; or
b. The use provides a necessary service supportive of the water-dependent uses and the proximity of the use to its customers makes its services less expensive and/or more convenient.
Wetland creation. The manipulation of the physical, chemical, or biological characteristics present to develop a wetland that did not previously exist at an upland site. Creation results in a gain in wetland area and functions. A typical action is the excavation of upland soils to elevations that will produce a wetland hydroperiod and hydric soils, and support the growth of hydrophytic plant species.
Wetland edge. The line delineating the outer edge of a wetland, as determined by application of the federal 1987 Wetland Delineation Manual (Environmental Laboratory, 1987) and the United States Army Corps of Engineers (USACE) Interim Regional Supplement for Western Mountains, Valleys, and Coast Region (USACE, 2010), or such other manual(s) adopted by the Department consistent with RCW 90.58.380 and WAC 173-22-035, as amended.
Wetland functions. Natural processes performed by wetlands including functions that are important in facilitating food chain production, providing habitat for nesting, rearing, and resting sites for aquatic, terrestrial, and avian species, maintaining the availability and quality of water, acting as recharge and discharge areas for groundwater aquifers and moderating surface and stormwater flows, as well as performing other functions including, but not limited to, those set forth in 33 CFR 320.4(b)(2), 1988.
Wetland, isolated. A wetland that is hydrologically isolated from other aquatic resources. Isolated wetlands may perform important functions and are protected by state law (Chapter 90.48 RCW), whether or not they are protected by federal law. The term “isolated wetland” shall not apply within the City’s shoreline jurisdiction as set forth in Chapter 25.05 SMC.
Wetland mosaic. An area with a concentration of multiple small wetlands, in which each patch of wetland is less than one acre; patches are less than 100 feet from each other; and areas delineated as wetland are more than 50 percent of the total area of the entire mosaic, including uplands and open water.
Wetland reestablishment. The manipulation of the physical, chemical, or biological characteristics of a site with the goal of returning natural/historic functions and environmental processes to a former wetland. Reestablishment results in rebuilding a former wetland and results in a gain in wetland area and functions.
Wetland rehabilitation. The manipulation of the physical, chemical, or biological characteristics of a site with the goal of repairing natural/historic functions and environmental processes to a degraded wetland. Rehabilitation results in a gain in wetland function, but does not result in a gain in wetland acres.
Wetlands. Wetlands are areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs and similar areas. Wetlands do not include those artificial wetlands intentionally created from nonwetland sites, including, but not limited to, irrigation and drainage ditches, grass-lined swales, canals, detention facilities, wastewater treatment facilities, farm ponds, and landscape amenities, or those wetlands created after July 1, 1990, that were unintentionally created as a result of the construction of a road, street, or highway. Wetlands may include those artificial wetlands intentionally created from nonwetland areas to mitigate the conversion of wetlands.
Wetlands of local significance. The wetland identified in the King County Council Wetlands Inventory (1990) as the East Lake Sammamish No. 21 wetland (North Beaver Lake Bog), and others as designated by the City Council. Wetlands of local significance shall be subject to greater protection and environmental education efforts where possible.
Wetpond. An artificial water body constructed as a part of a surface water management system.
Wildlife shelter. A facility for the temporary housing of sick, wounded, or displaced wildlife.
Work release facility. A facility that allows the opportunity for convicted persons to be employed outside of the facility, but requires confinement within the facility when not in the place of employment.
Wrecked, dismantled, or inoperative vehicle. A motor vehicle or the remains or remnant parts of a motor vehicle that is mechanically inoperative and cannot be made operative without the addition of vital parts or mechanisms or the application of a substantial amount of labor, and meets at least three of the following requirements:
a. Is three years old or older;
b. Is extensively damaged, such damage including but not limited to any of the following: missing wheels, tires, motor, or transmission;
c. Is apparently inoperable;
d. Has an approximate fair market value equal only to the approximate value of the scrap in it.
Yard. Any surface area that is not structured or hardened. Yard areas may be landscaped, contain uncovered decks of less than 18 inches above grade, and artificial turf, but do not include areas covered by pervious concrete or other similar materials.
Yard or organic waste processing facility. A site where yard and garden wastes, including wood and land clearing debris, are processed into new products such as soil amendments and wood chips. (Ord. O2025-583 § 2 (Att. A.7); Ord. O2024-578 § 2 (Att. A); Ord. O2024-571 § 2 (Att. A); Ord. O2023-553 § 1 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Purpose. The purpose of this chapter is to provide a set of general terms and designations, including definitions and standards, for terminology primarily used in this chapter. Definitions and standards for terms used more broadly throughout the code are found in SMC 21.04.040.
B. Street Designation.
1. Primary Street, Side Street, and Alley Designations.
a. All streets abutting a lot must be designated as either a primary street, side street, or alley.
b. When a lot abuts only one street, the street is considered a primary street.
c. A lot abutting multiple streets must designate at least one as a primary street but may abut more than one primary street.
d. For lots that abut multiple streets, the Director will determine the primary street using the following criteria, which are listed from most important to least important:
i. The street or streets with the highest classification according to the Street Typology Map (SMC 21.02.030.G);
ii. The established orientation of the block;
iii. The street abutting the longest face of the block; and
e. Any street not designated as a primary street is designated as a side street. (Ord. O2024-578 § 2 (Att. A))
Districts
A. Purpose. The general purposes of this Chapter are:
1. To encourage land use decision making in accordance with the public interest and applicable laws of the state of Washington;
2. To protect the general public health, safety, and welfare;
3. To implement the City of Sammamish interim comprehensive plan’s policies and objectives through land use regulations;
4. To provide for the economic, social, and aesthetic advantages of orderly development through harmonious groupings of compatible and complementary land uses and the application of appropriate development standards;
5. To provide for adequate public facilities and services in conjunction with development; and
6. To promote general public safety by regulating development of lands containing physical hazards and to minimize the adverse environmental impacts of development.
B. Interpretation—Applicability and intent.
1. Intent. This chapter and SMC 21.09.070 establish the procedure by which the City of Sammamish will render a formal interpretation of a development regulation. The purpose of such an interpretation includes clarifying conflicting or ambiguous provisions in the City’s development regulations.
2. Applicability. This chapter and SMC 21.09.070 authorize the director to issue interpretations on regulations related to controls placed on development or land use activities by the City, including but not limited to zoning ordinances, critical areas ordinances, shoreline master program requirements, official controls, subdivision ordinances, and binding site plan ordinances, together with any amendments thereto. Nothing in this chapter and SMC 21.09.070 shall prevent interpretations related to the applicability of specific regulatory requirements contained within the Sammamish Municipal Code to individual projects. Further, nothing in this chapter or SMC 21.09.070 shall preclude the director or hearing examiner from interpreting a regulatory requirement during the course of a public hearing.
C. Interpretation—General.
1. In case of inconsistency or conflict, regulations, conditions, or procedural requirements that are specific to an individual land use shall supersede regulations, conditions, or procedural requirements of general application.
2. A land use includes the necessary structures to support the use unless specifically prohibited or the context clearly indicates otherwise.
3. In case of any ambiguity, difference of meaning, or implication between the text and any heading, caption, or illustration, the text and the permitted use tables in Chapter 21.05 SMC shall control. All applicable requirements shall govern a use whether or not they are cross-referenced in a text section or land use table.
4. Unless the context clearly indicates otherwise, words in the present tense shall include past and future tense, and words in the singular shall include the plural, or vice versa. Except for words and terms defined in this Chapter, all words and terms used in this Chapter shall have their customary meanings.
5. A written interpretation by the director of the provisions of the Sammamish Municipal Code clarifies conflicting or ambiguous wording, or the scope or intent of the provisions of the code. The written interpretation shall control application of the code sections discussed in it to any specific land use application. Written interpretations issued for regulatory requirements that have been legislatively modified, repealed, or otherwise substantially changed, shall be considered null and void.
6. Any written interpretation shall not be applied retroactively, unless specifically required by the terms of the interpretation.
D. Interpretation—Standard industrial classification.
1. All references to the standard industrial classification (SIC) are to the titles and descriptions found in the Standard Industrial Classification Manual, 1987 Edition, prepared by the United States Office of Management and Budget that is hereby adopted by reference. The SIC is used, with modifications to suit the purposes of this Chapter, to list and define land uses authorized to be located in the various zones consistent with the Comprehensive Plan land use map.
2. The SIC categorizes each land use under a general two-digit major group number, or under a more specific three- or four-digit industry group or industry number. A use shown on a land use table with a two-digit number includes all uses listed in the SIC for that major group. A use shown with a three-digit or four-digit number includes only the uses listed in the SIC for that industry group or industry.
3. An asterisk (*) in the SIC number column of a land use table means that the SIC definition for the specific land use identified has been modified by this Chapter. The definition may include one or more SIC subclassification numbers, or may define the use without reference to the SIC.
4. The director shall determine whether a proposed land use not specifically listed in a land use table or specifically included within a SIC classification is allowed in a zone. The director’s determination shall be based on whether or not permitting the proposed use in a particular zone is consistent with the purposes of this Chapter and the zone’s purpose as set forth in SMC 21.04.020, by considering the following factors:
a. The physical characteristics of the use and its supporting structures, including but not limited to scale, traffic and other impacts, and hours of operation;
b. Whether or not the use complements or is compatible with other uses permitted in the zone; and
c. The SIC classification, if any, assigned to the business or other entity that will carry on the primary activities of the proposed use.
E. Interpretation—Zoning maps. Where uncertainties exist as to the location of any zone boundaries, the following rules of interpretation, listed in priority order, shall apply:
1. Where boundaries are indicated as paralleling the approximate centerline of the street right-of-way, the zone shall extend to each adjacent boundary of the right-of-way. Non-road-related uses by adjacent property owners, if allowed in the right-of-way, shall meet the same zoning requirements regulating the property owner’s lot;
2. Where boundaries are indicated as approximately following lot lines, the actual lot lines shall be considered the boundaries;
3. Where boundaries are indicated as following lines of ordinary high water, or government meander line, the lines shall be considered to be the actual boundaries. If these lines should change the boundaries shall be considered to move with them; and
4. If none of the rules of interpretation described in subsections 1. through 3. of this section apply, then the zoning boundary shall be determined by map scaling.
F. Interpretation—Public request—Acknowledgment—Notice.
1. A person may request a code interpretation by submitting a request in accordance with this chapter. The director may also issue a code interpretation on the director’s own initiative.
2. A request for a code interpretation must be submitted in writing to the director.
3. A code interpretation request must:
a. Be in writing and shall be clearly labeled “Request for Code Interpretation.” Failure to satisfy this requirement relieves the director of any obligation to acknowledge or otherwise process the request;
b. Identify the person seeking the code interpretation and provide an address to which correspondence regarding the requested code interpretation should be mailed;
c. Identify the specific section or sections of the City of Sammamish’s development regulations for which an interpretation is requested;
d. Identify the parcel or site, if the code interpretation request involves a particular parcel of property or site;
e. Identify the code enforcement action, if the code interpretation request involves a code enforcement case;
f. Be accompanied by the fee required as set forth by the adopted fee resolution; and
g. Be limited to a single subject, which may require interpretation of one or more code sections.
4. Within 21 days after receiving a code interpretation request, the director shall acknowledge receipt of the request. The director shall mail the acknowledgment to the person submitting the request at the address provided in the request. The acknowledgment shall include the following information, as applicable:
a. If the director determines that the code interpretation request does not contain the information required under this section, the director shall identify in the acknowledgment the deficiencies in the code interpretation request. In such a situation, the director is under no obligation to process the code interpretation request until a code interpretation request complying with this chapter is submitted;
b. If the director determines that the code interpretation request is ambiguous or unclear, the director may request that the person making the request clarify the request. The director is under no obligation to process the code interpretation request until an adequately clarified code interpretation request is submitted;
c. If the director determines that the code interpretation request presents substantially the same issue as is pending before an adjudicatory body, such as the City hearing examiner, the City council when acting as a quasi-judicial body, any other quasi-judicial agency or any local, state or federal court, the director shall so state in the acknowledgment. The director is then under no obligation to further process the code interpretation request; and
d. If a code interpretation is requested regarding an issue that the director has previously addressed through a code interpretation, the director is not obligated to issue another code interpretation and shall so state in the acknowledgment required by this section and shall identify the previous code interpretation.
e. If the director determines that the code interpretation request relates to a particular parcel of property, the director shall cause notice of the code interpretation request to be given to the taxpayer of record for the subject parcel.
f. If the code interpretation request relates to a specific development project pending before the City, the director shall cause notice of the code interpretation request to be given to all parties of record for that project, including the applicant.
g. If the code interpretation is initiated by the City, the director shall cause notice of the code interpretation to be posted on the City’s website and at City Hall in addition to any other notice required by this section.
h. The notice required under this section must include a copy of any code interpretation request and a copy of the director’s acknowledgment. Notice to property taxpayers, applicants, or persons requesting an interpretation may be by United States mail or other appropriate method of delivery.
G. Classification of right-of-way.
1. Except when such areas are specifically designated on the zoning map as being classified in one of the zones provided in this Chapter, land contained in rights-of-way for streets or alleys, or railroads shall be considered unclassified.
2. Within street or alley rights-of-way, uses shall be limited to street purposes as defined by law.
3. Within railroad rights-of-way, allowed uses shall be limited to tracks, signals, or other operating devices, movement of rolling stock, utility lines and equipment, and facilities accessory to and used directly for the delivery and distribution of services to abutting property.
4. Where such right-of-way is vacated, the vacated area shall have the zone classification of the adjoining property with which it is first merged. (Ord. O2021-540 § 2 (Att. A))
A. Zones and Map Designations Established. In order to accomplish the purposes of this chapter the following zoning designations and zoning map symbols are established:
Zoning Map Designations | |
|---|---|
Zoning Designation | Map Symbol |
Residential | R (base density in dwellings per acre) |
Neighborhood Business | NB |
Community Business | CB |
Office | O |
Middle Housing Overlay 1 | MHO-1 |
Middle Housing Overlay 2 | MHO-2 |
Middle Housing Overlay 3 | MHO-3 |
B. Zone and Map Designation Purpose. The purpose statements for each zone and map designation set forth in the following sections shall be used to guide the application of the zones and designations to all lands in City of Sammamish. The purpose statements also shall guide interpretation and application of land use regulations within the zones and designations and any changes to the range of permitted uses within each zone through amendments to this chapter.
C. Residential Zone.
1. The purpose of the residential (R) zone is to implement comprehensive plan goals and policies for housing quality, diversity, and affordability and to efficiently use residential land, public services, and energy. These purposes are accomplished by:
a. Providing, in the R-1 through R-8 zones, for a mix of predominantly single detached dwelling units and other development types, with a variety of densities and sizes in locations appropriate for urban densities;
b. Providing, in the R-12 or R-18 zone, for a mix of predominantly apartment and townhouse dwelling units and other development types, with a variety of densities and sizes in locations appropriate for urban densities;
c. Allowing only those accessory and complementary nonresidential uses that are compatible with residential communities; and
d. Establishing density designations to facilitate advanced area-wide planning for public facilities and services, and to protect environmentally sensitive sites from overdevelopment.
2. Use of this zone is appropriate in urban areas or activity centers, designated by the comprehensive plan or community plans as follows:
a. The R-1 zone on or adjacent to lands with area-wide environmental constraints where development is required to cluster away from sensitive areas, on lands designated urban separators or wildlife habitat network where development is required to cluster away from the axis of the corridor, or in well-established subdivisions of the same density, which are served at the time of development by public or private facilities and services adequate to support planned densities;
b. The R-4 through R-8 zones on urban lands that are predominantly environmentally unconstrained and are served at the time of development, by adequate public sewers, water supply, streets, and other needed public facilities and services; and
c. The R-12 or R-18 zone in urban areas, urban or community activity centers or urban neighborhood centers, that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
D. Neighborhood Business Zone.
1. The purpose of the neighborhood business (NB) zone is to provide convenient daily retail and personal services for a limited service area and to minimize impacts of commercial activities on nearby properties and in urban areas on properties with the land use designation of commercial outside of center, to provide for limited residential development. These purposes are accomplished by:
a. Limiting nonresidential uses to those retail or personal services that can serve the everyday needs of a surrounding urban residential area;
b. Allowing for mixed use (housing and retail/service) developments and for townhouse developments as a sole use on properties in the urban area with the land use designation of commercial outside of center.
2. Use of this zone is appropriate in urban neighborhood business centers, designated by the comprehensive plan, on sites that are served at the time of development by adequate public sewers when located in urban areas or adequate on-site sewage disposal, water supply, streets and other needed public facilities and services.
E. Community Business Zone.
1. The purpose of the community business (CB) zone is to provide convenience and comparison retail and personal services for local service areas that exceed the daily convenience needs of adjacent neighborhoods but that cannot be served conveniently by larger activity centers, and to provide retail and personal services in locations within activity centers that are not appropriate for extensive outdoor storage or auto-related and industrial uses. These purposes are accomplished by:
a. Providing for limited small-scale offices as well as a wider range of the retail, professional, governmental and personal services than are found in neighborhood business areas;
b. Allowing for mixed use (housing and retail/service) developments; and
c. Excluding commercial uses with extensive outdoor storage or auto-related and industrial uses.
2. Use of this zone is appropriate in urban and community centers that are designated by the adopted City of Sammamish comprehensive plan and community plans and that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
F. Office Zone.
1. The purpose of the office (O) zone is to provide for pedestrian and transit-oriented high-density employment uses together with limited complementary retail and urban density residential development in locations within activity centers where the full range of commercial activities is not desirable. These purposes are accomplished by:
a. Allowing for uses that will take advantage of pedestrian-oriented site and street improvement standards;
b. Providing for higher building heights and floor area ratios than those found in community centers;
c. Reducing the ratio of required parking to building floor area;
d. Allowing for on-site convenient daily retail and personal services for employees and residences; and
e. Excluding auto-oriented, outdoor or other retail sales and services that do not provide for the daily convenience needs of on-site and nearby employees or residents.
2. Use of this zone is appropriate in activity centers designated by the adopted City of Sammamish comprehensive plan that are served at the time of development by adequate public sewers, water supply, streets, and other needed public facilities and services.
G. Repealed.
H. Middle Housing Overlays. The purpose of the middle housing overlays is to provide for middle housing typologies through form-based zoning controls. The middle housing overlays apply to the following zones:
1. MHO-1 applies to the R-1 district.
2. MHO-2 applies to the R-4 district.
3. MHO-3 applies to the R-6 and R-8 districts.
I. Zoning Maps and Boundaries.
1. The location and boundaries of the zones defined by this chapter shall be shown and delineated on zoning maps adopted by ordinance.
2. Changes in the boundaries of the zones, including application or amendment of interim zoning, shall be made by ordinance adopting or amending a zoning map.
3. Zoning maps are available for public review at the City of Sammamish offices during regular business hours. (Ord. O2025-583 § 2 (Att. A.4); Ord. O2024-578 § 2 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Purpose. The purpose of this chapter is to establish basic dimensional standards for development, generally related to residential density and commercial intensity, setbacks, height, individual building bulk and variation, as well as specific rules for general application. The standards and rules are established to provide flexibility in project design and regulate some of the effects of density and intensity of development.
Additional design criteria are located in SMC 21.02, Neighborhood Design, and apply to all residential development.
B. Interpretation of Tables.
1. SMC 21.04.030.C and SMC 21.04.030.D contain general density and dimension standards for the various zones and limitations specific to a particular zone(s). Additional rules, exceptions, and methodologies are set forth in SMC 21.04.030.E through SMC 21.04.030.X.
2. The density and dimension tables are arranged in a matrix format on two separate tables and are delineated into two general land use categories:
a. Residential; and
b. Commercial.
3. Development standards are listed down the left side of both tables, and the zones are listed at the top. The matrix cells contain the minimum dimensional requirements of the zone. The parenthetical numbers in the matrix identify specific requirements applicable either to a specific use or zone. A blank box indicates that there are no specific requirements. If more than one standard appears in a cell, each standard will be subject to any applicable parenthetical footnote following the standard.
C. Site Planning Standards—Residential Zones.
Residential Zones | ||||||
|---|---|---|---|---|---|---|
STANDARDS | R-1 | R-4 | R-6 | R-8 | R-12 | R-18 |
DENSITY AND LOT DIMENSIONS | ||||||
Maximum Density, DU/Acre (8) | 1 du/ac | 4 du/ac (2) | 6 du/ac | 8 du/ac | 12 du/ac | 18 du/ac |
85% | 80% | 75% | ||||
Minimun Lot Width | 35' | 30' | 30' | 30' | 30' | 30' |
Maximum Residential Floor to Area Ratio (FAR) – Detached alley accessed garages are exempt | ||||||
Single-Family | 50% | 50% | 50% | 50% | ||
ADU | Exempt | Exempt | Exempt | Exempt | ||
See subsection Y of this section, Site Planning Standards – Middle Housing Overlays | ||||||
Building Footprint Maximum | 3,000 square feet (maximum per building) | |||||
Hardscape Coverage Maximum (10) | 30% | 40% | 50% | 75% | 85% | 85% |
Front Yard Setback Landscaping Minimum | 30% | 30% | ||||
DRIVEWAYS (MEASURED AT THE EDGE OF THE STREET RIGHT-OF-WAY, NOT APPLICABLE FOR DRIVEWAYS FROM ALLEYS) AND PARKING | ||||||
Driveway Width Maximum | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | 30% of parcel width, up to 20' | ||
Driveway Width Minimum | 12' | 12' | 12' | 12' | ||
Driveway Length Minimum to Required Spaces From Street Property Line | 20' | 20' | 20' | 20' | ||
BUILDING SETBACKS | ||||||
Front Yard Minimum | 20' (5) | 10' | 10' | 10' | ||
25' | 10' (6) | 5' | 5' | |||
Rear Yard Minimum | 30' | 20' | 20' | 20' | ||
Buildings Less Than 2,500 Square Feet | ||||||
15' | 15' | |||||
Side Yard Minimum | 5' | 5' | ||||
Rear Yard | 15' average, 12' minimum | 15' average, 12' minimum | ||||
Buildings Between 2,500 and 4,000 Square Feet | ||||||
20' | 15' | |||||
Side Yard | 10' average, | 10' average, | ||||
Rear Yard | 20' average, | 20' average, | ||||
Buildings Greater Than 4,000 Square Feet | ||||||
25' | 20' | |||||
Side Yard | 12' average, | 12' average, | ||||
Rear Yard | 25' average, | 25' average, | ||||
Side Yard Minimum | 5' | 5' | 5' | 5' | 5' | 5' |
Rear Yard Minimum | 5' | 5' | 5' | 5' | 5' | 5' |
Front Yard Minimum | 20' (5) | 15' (5) | 15' (5) | 10' | 10' | 10' |
10' | 10' | 10' | 10' | 5' | 5' | |
Rear Yard Minimum | 10' | 10' | 10' | 10' | 5' | 5' |
HEIGHT MAXIMUMS | ||||||
35' | 35' | 35' | 35' | 60' | 60' | |
Detached Accessory Dwellings | 24' | 24' | 24' | 24' | 24' | 24' |
Development Conditions:
(1)These standards may be modified under the provisions for zero lot line and townhouse developments.
(2)Mobile home parks shall be allowed a density of up to six dwelling units per acre.
(3)See subsection I of this section for information on minimum density calculations.
(4)When constructed in accordance with accessory dwelling unit regulations in SMC 21.05.010.C.5.a.
(6)Side yard setbacks may be a minimum of five feet when the abutting property is zoned R-8, R-12, or R-18.
(7)Only applies to stand-alone detached accessory dwelling units. Does not apply to detached accessory dwelling units that are combined with other structures or improvements such as pool houses, outdoor kitchens, detached garages, covered patios, etc. Standard minimum structure setbacks apply to detached accessory dwelling units that are combined with other structures and improvements.
(8)Maximum density for R-1, R-4, R-6, and R-8 districts may be exceeded under middle housing development as specified in the site planning standards for middle housing overlays in subsection Y of this section.
(9)Maximum floor to area ratios and site planning standards for middle housing are specified in subsection Y of this section.
(10)Accessory dwelling units are exempt from hardscape coverage and floor area ratio calculations when constructed on a lot with a single-family home and in accordance with the regulations in SMC 21.05.010.C, Note (5)(a).
D. Densities and Dimensions—Commercial Zones.
Commercial Zones | |||
|---|---|---|---|
Zones | Commercial | ||
STANDARDS | NB | CB | O |
Maximum Density: DU/Acre | 8 du/ac (1) | 18 du/ac (1) | 18 du/ac (1) |
Minimum Lot Area | |||
Maximum Lot Depth/Width Ratio | 10 ft | 10 ft | |
20 ft (5) | 20 ft (5) | 20 ft (5) | |
10 ft (2) | 10 ft (2) | 10 ft | |
20 ft (5) | 20 ft (5) | 20 ft (5) | |
35 ft 45 ft (3) | 35 ft 60 ft (3) | 45 ft 60 ft (3) | |
Maximum Floor/Lot Ratio: Square Feet | 1/1 (6) | 1.5/1 (6) | 2.5/1 (6) |
Maximum Impervious Surface: Percentage (8) | 85% | 85% | 75% |
Development Conditions:
(1)These densities are allowed only through the application of mixed use development standards and for stand-alone townhouse development in the NB zone on property designated commercial outside of center in the urban area.
(2)Gas station pump islands shall be placed no closer than 25 feet to street front lines.
(3)This maximum structure height allowed only for mixed use developments and for stand-alone townhouse development in the NB zone on property designated commercial outside of center in the urban area.
(4)Required on property lines adjoining residential zones.
(5)Required on property lines adjoining residential zones for industrial uses established by conditional use permits.
(6)The floor/lot ratio for mixed use developments shall conform to SMC 21.07.060.
(7)Height limits may be increased when portions of the structure or building which exceed the maximum structure height limit provide one additional foot of front, rear, and side yard setback for each foot above the maximum structure height limit, provided the maximum height may exceed 75 feet only in mixed use developments. Netting or fencing and support structures for the netting or fencing used to contain golf balls in the operation of golf courses or golf driving ranges are exempt from this additional setback requirement; provided, that the maximum height shall not exceed 75 feet.
(8)The impervious surface area for any lot may be increased beyond the total amount permitted in this chapter subject to approval of a conditional use permit.
E. Measurement Methods. The following provisions shall be used to determine compliance with this Chapter:
1. Front yard setbacks shall be measured from the property line or lot line of an existing edge of a street right-of-way or temporary turnaround, except as provided by SMC 21.04.030.R;
2. Lot widths shall be measured by scaling a circle of the applicable diameter within the boundaries of the lot; provided, that an access easement shall not be included within the circle;
3. Structure height shall be measured from the average existing grade of land prior to any cuts and fills or other disturbances associated with the proposed project to the highest point of the structure or roof. The average existing grade shall be determined by first delineating the smallest square or rectangle that can enclose the structure or building and then averaging the existing grade elevations taken at the midpoint of each side of the square or rectangle;
4. Lot area shall be the total horizontal land area contained within the boundaries of a lot; and
5. Impervious surface calculations shall not include areas of turf, landscaping, natural vegetation, surface water flow control, or water quality treatment facilities.
F. Minimum Urban Residential Density. Minimum density for residential development in the urban areas designated by the comprehensive plan shall be based on the tables in this chapter and adjusted as provided for in SMC 21.04.030.I.
G. Calculations—Allowable Dwelling Units, Lots, or Commercial Floor Area. Permitted number of dwelling units, lots, or commercial floor area shall be determined as follows:
1. The allowed number of dwelling units or lots (base density) shall be computed by multiplying the site area specified in SMC 21.04.030.H by the applicable residential base density number;
2. The maximum density (dwelling units or lots) limits shall be computed by adding the bonus or transfer units authorized by SMC 21.06.070 to the base units computed under subsection G.1 of this section;
3. The allowed commercial floor area, which excludes structured or underground parking areas and areas housing mechanical equipment, shall be computed by applying the floor-to-lot area ratio to the project site area specified in SMC 21.04.030.H;
4. Repealed.
5. When calculations other than density calculations result in a fraction, the fraction shall be rounded to the nearest whole number as follows:
a. Fractions of 0.51 or above shall be rounded up;
b. Fractions of 0.50 or below shall be rounded down; and
c. For the purpose of the application of this part, rounding is based on a fraction that is truncated to two numbers past the decimal point. For example, 2.50823 is truncated to 2.50; and
6. When density calculations result in a fraction:
a. For multifamily and attached dwelling projects located in the R-8, R-12, R-18, NB, CB, or O zone with density calculations resulting in a fraction, the fraction shall be rounded to the nearest whole number as follows:
i. Fractions of 0.51 or above shall be rounded up; and
ii. Fractions of 0.50 or below shall be rounded down.
b. Subdivisions. For subdivision proposals with density calculations resulting in 10 or more whole units of density before rounding fractions, the fraction may be rounded to the nearest whole number when the fraction is equal to or greater than 0.51. The extra unit achieved by rounding up must be used for an affordable housing unit duplex meeting the requirements of SMC 21.05.010.C.17, 21.07.100.E, and 21.07.100.F. For example, a subdivision proposal with a density calculation resulting in 10.51 would yield 10 single-family detached residential units, or 10 single-family detached residential units and one affordable housing unit duplex consisting of two affordable housing units for a total of 12 units. Nothing in this subsection restricts or limits the application of the density bonus provisions found in other sections of the code.
c. Short Subdivisions. For subdivision proposals with density calculations resulting in nine or fewer whole units of density before rounding fractions, the fraction may be rounded to the nearest whole number when the fraction is equal to or greater than 0.71. The extra unit achieved by rounding up must be used for an affordable housing unit duplex meeting the requirements of SMC 21.05.010.C.17, 21.07.100.E, and 21.07.100.F. For example, a subdivision proposal with a density calculation resulting in 4.71 would yield four single-family detached residential units, or four single-family detached residential units and one affordable housing unit duplex consisting of two affordable housing units for a total of six units. Nothing in this subsection restricts or limits the application of the density bonus provisions found in other sections of the code.
d. For subdivision proposals with density calculations resulting in fractions and where the project design utilizes townhomes or duplexes for at least 25 percent of the total project units, the fraction shall be rounded to the nearest whole number as follows:
i. Fractions of 0.21 or above shall be rounded up; and
ii. Fractions of 0.20 or below shall be rounded down.
e. For the purpose of the application of this part, rounding is based on a fraction that is truncated to two numbers past the decimal point. For example, 2.50823 is truncated to 2.50.
H. Calculations—Site Area Used for Density Calculations.
1. All site areas may be used in the calculation of maximum allowed residential density or project floor area except as outlined under the provisions of subsection 2. of this section.
2. Existing submerged lands, steep slopes and buffers, Categories 1 – 4 wetlands and buffers, Types S, F, Np, and Ns streams and buffers, and property to be used as a street(s) shall not be credited toward base and maximum density or floor area calculations; provided, that subdivisions or short plats that meet the tree retention standards of SMC 21.03.060.G, Tree retention requirements, shall be credited 10 percent of the environmentally sensitive areas and associated buffers identified above.
a. The site has accumulated sufficient technique points pursuant to SMC 21.03.030.D, preferred low impact development incentives, to allow for inclusion of such areas as set forth in that section; or
b. The site meets the tree retention incentives of SMC 21.03.060.G, in which case 10 percent of the critical areas and buffers identified above may be included in the site area used for calculating base and maximum density or floor area.
I. Calculations—Site Area Used for Minimum Density Calculations. Minimum density shall be determined by:
1. Multiplying the density (dwelling units/acre) as set forth in subsection H of this section by the net buildable area of the project site; and then
2. Multiplying the resulting product by minimum density percentage set forth in subsection F of this section.
J. Building Height Measurement.
1. General. Buildings on relatively flat sites must use the measurement in subsection J.2.a of this section. Buildings on steeply sloping sites or set back more than 20 feet from the street right-of-way must use the measurement in subsection J.2.b of this section.
2. Measurement of Height.
a. On any lot where existing grade slopes up or down less than six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building, the starting point for the calculation of structure height is the elevation measured from average existing grade to the highest point of the building. The average existing grade elevation is calculated using the existing elevation of the midpoint of each wall segment averaged to create the average existing grade plan as depicted below:


b. On any lot where existing grade slopes up or down at least six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building, the starting point for the measurement of height must be calculated as follows:
i. Draw the smallest rectangle that encloses the entire principal structure.

ii. Divide the side of the rectangle into equal segments measuring at least 15 feet in length. The lines must be extended across the rectangle perpendicular to the side of the rectangle to create the segment B.

iii. The maximum height for each segment of the structure is measured from the average grade for each segment along the structure. The average existing grade is calculated by adding the elevation of original grade at the midpoint of the two opposing exterior walls of each segment and dividing by two.

3. Maximum Side Wall Height. The maximum side wall height of any building must not exceed 24 feet. A side wall is any wall generally parallel to a side lot line and located closer than two feet to a five-foot side yard building setback or any wall located closer than four feet to any larger side yard building setback. This height is measured from either:
a. Average original grade at the midpoint of a building where existing grade slopes up or down less than six feet from the wall of the building closest to the front property line to the opposite wall at the rear of the building; or

b. The average grade calculated for each segment for buildings subject to subsection J.2.b of this section.


K. Lot area—Prohibited reduction. Any portion of a lot that was used to calculate compliance with the standards and regulations of this Chapter shall not be subsequently subdivided or segregated from such lot.
L. Measurement of setbacks.
1. Side Yard Setback. The side yard setback is the setback between a structure and any lot line to which neither the street nor rear yard setback applies. The side yard setback is measured from a side yard lot line to a line parallel to and measured perpendicularly from the side yard lot line at the depth prescribed for each zone. Four-sided corner lots abutting streets on two sides shall have two side setbacks and no rear setback.
2. Front Yard Setback. The front yard setback is measured between a structure and the front yard lot line. The front yard setback is measured from a front yard lot line to a line parallel to (offset to) and measured perpendicularly from the front yard lot line at the depth prescribed for each zone. In lots adjoining two or more front yards, including corner lots, the minimum front yard setback shall apply to all such front yards.
3. Rear Yard Setback. The rear yard setback is the setback measurement between a structure and the rear yard lot line. Four-sided lots adjoining more than one street shall have no rear yard setback. In triangular lots with one street frontage, the rear setback shall be measured from the shorter of the lot lines not adjoining the streey.
M. Setbacks—Specific building or use. When a building or use is required to maintain a specific setback from a property line or other building, such setback shall apply only to the specified building or use.
N. Setbacks—Livestock buildings and manure storage areas.
1. The minimum setback for any building used to house, confine or feed swine shall be 90 feet. If a greater dimension is specified within this code the greater dimension shall apply.
2. The minimum setback for any building used to house, confine or feed any other livestock shall be 25 feet. If a greater dimension is specified within this code the greater dimension shall apply.
3. The minimum setback for any manure storage area shall be 35 feet. If a greater dimension is specified within this code the greater dimension shall apply.
O. Setbacks—Modifications. The following setback modifications are permitted:
1. When the common property line of two lots is covered by a building(s), the setbacks required by this chapter shall not apply along the common property line; and
2. When a lot is located between lots having nonconforming front yard setbacks, the required front yard setback for such lot may be the average of the two nonconforming setbacks or 60 percent of the required front yard setback, whichever results in the greater front yard setback.
3. Reduction of minimum rear yard and/or side yard setbacks to no less than five feet shall be granted when bundled and submitted with a Type I permit application and when agreement with the adjoining property owner(s) of a parcel under separate ownership has been reached resulting in an executed agreement that includes an approved site plan consenting to a reduction of setback. The agreement shall provide that it runs with the land and must be recorded with King County Records prior to permit issuance. The agreement shall reference the parcel number and legal description of all affected properties and conform to a format specified by the director. Setback reductions granted under this part shall not cause for a violation or nonconformance with existing site restrictions (e.g., easements) or adopted construction codes, Chapter 16.05 SMC. The setback reduction granted under this part shall not be available for or applicable to lots created through the subdivision process that remain vested under RCW 58.17.170.
P. Setbacks—Required building separation. The provisions of this section do not apply to zero lot line development proposed pursuant to SMC 21.07.060.
Q. Setbacks—From regional utility corridors.
1. In subdivisions and short subdivisions, areas used as regional utility corridors shall be contained in separate tracts.
2. In other types of land development permits, easements shall be used to delineate such corridors.
3. All buildings and structures shall maintain a minimum distance of five feet from property or easement lines delineating the boundary of regional utility corridors, except for utility structures necessary to the operation of the utility corridor or when structures are allowed by mutual agreement in the utility corridor.
R. Setbacks—From alley.
1. Structures may be built to a property line abutting an alley, except as provided in subsection 2. of this section.
2. Vehicle access points from garages, carports or fenced parking areas shall be set back from the alley property line to provide a straight line length of at least 26 feet, as measured from the centerline of the garage, carport or fenced parking area, from the access point to the opposite edge of the alley. No portion of the garage or the door in motion may cross the property line.
S. Setbacks—Required modifications. The following setback modifications are required:
1. In addition to providing the standard street setback, a lot adjoining a half-street or designated arterial shall provide an additional width of street setback sufficient to accommodate construction of the planned half-street or arterial; and
2. Where the standard setback for a property is modified within an adopted neighborhood plan area zoning, the applicable setback shall be that specified therein.
T. Setbacks—Projections and structures allowed. Provided, that the required setbacks from regional utility corridors of SMC 21.04.030.Q, as allowed in the environmentally critical areas of SMC 21.03.020.S, the adjoining half-street or designated arterial setbacks of SMC 21.04.030.S and the sight distance requirements of SMC 21.04.030.W are maintained, structures may extend into or be located in required setbacks, as follows:
1. Fireplace structures, bay or garden windows, enclosed stair landings, closets, or similar structures may project 30 inches into a rear yard or front yard setback and 18 inches into a side yard setback, provided such projections are:
a. Limited to two per facade; and
b. Not wider than 10 feet;
2. Uncovered porches and decks that exceed 18 inches above the finished grade may project five feet into the front yard setback;
3. Uncovered porches and decks not exceeding 18 inches above the finished grade may project to the street property line;
4. Eaves may not project more than:
a. Twenty-four inches into a rear yard or front yard setback; or
b. Eighteen inches across a lot line in a zero lot line development, provided there are appropriate easements, and that any neighboring building and its associated eaves are 10 feet from the lot line; or
5. Fences in accord with SMC 21.06.020.E.1;
6. Rockeries, retaining walls and curbs may project into or be located in any setback provided these structures:
a. Do not exceed a height of six feet in the R-1 through R-18 zones;
b. Do not exceed the building height for the zone in commercial zones, measured in accordance with the standards established in the International Building Code, SMC Title 16; and
c. Are in accordance with the requirements in SMC 21.03.020, Environmentally Critical Areas;
7. Fences located on top of rockeries, retaining walls or berms are subject to the requirements of SMC 21.06.020.E;
8. Telephone poles and lines; power poles and lines; cable TV and Internet lines; light and flagpoles; trellises not exceeding eight feet in height, not wider than 10 feet; culverts; underground water facilities; underground sewer facilities; and accessory facilities for the provision of utilities, such as drains, but excluding electrical and cellular equipment cabinets, and similar utility boxes and vaults;
9. The following may project into or be located within a setback, but may only project into or be located within a rear yard or side yard setback area if an agreement documenting consent between the owners of record of the abutting properties is recorded with the King County Department of Records and Elections prior to the installment or construction of the structure:
a. Sprinkler systems, heat pumps, air conditioning units, electrical and cellular equipment cabinets and other similar utility boxes and vaults;
b. Security system access controls;
c. Structures, except for buildings, associated with trails and on-site recreation spaces and play areas required in SMC 21.02.030.I and SMC 21.02.030.K such as benches, picnic tables and drinking fountains; and
d. Surface water management facilities as required by Chapter 9.04 KCC as adopted by SMC 21.03.050;
10. Mailboxes and newspaper boxes may project into or be located within front yard setbacks;
11. Fire hydrants and associated appendages;
12. Metro bus shelters may be located within front yard setbacks;
13. Unless otherwise allowed in SMC 21.06.050.F.1, freestanding and monument signs four feet or less in height, with a maximum sign area of 20 square feet, may project into or be located within front yard setbacks; and
14. Stormwater vaults, structures, and conveyance systems, both above and below ground, provided such projections are:
a. Consistent with setback, easement and access requirements specified in the current Surface Water Design Manual; or
b. In the absence of said specifications, not within 10 feet of the property line for stormwater vaults and structures, and not within five feet of the property line for conveyance systems.

U. Height—Exceptions to limits. The following structures may be erected above the height limits of SMC 21.04.030.C through SMC 21.04.030.E:
1. Roof structures housing or screening elevators, stairways, tanks, ventilating fans or similar equipment required for building operation and maintenance; and
2. Fire or parapet walls, skylights, flagpoles, public athletic field lighting, chimneys, smokestacks, church steeples, crosses, spires, communication transmission and receiving structures, utility line towers and poles, and similar structures.
3. Netting or fencing and support structures for the netting or fencing used to contain golf balls in the operation of golf courses or golf driving ranges may have a maximum height of 75 feet.
4. In the R-18 zone, structures may be up to 80 feet in height for projects using residential density incentives and transfer of density credits pursuant to this title.
5. For school and government uses, structure height may exceed the maximum structure height by one foot for every one foot the front, side, and rear yard setbacks are increased above the minimum setbacks; provided, however, the maximum structure height may not exceed 75 feet.
V. Lot divided by zone boundary. When a lot is divided by a zone boundary, the following rules shall apply:
1. When a lot contains both residential and nonresidential zoning, the zone boundary between the zones shall be considered a lot line for determining permitted building height and required setbacks on the site;
2. When a lot contains residential zones of varying density:
a. Any residential density transfer within the lot shall be allowed from the portion with the lesser residential density to that of the greater residential density;
b. Residential density transfer from the higher density zone to the lower density zone may be allowed only when:
i. The units transferred from any R-12 or R-18 zoned portion of the lot are maintained in an attached dwelling unit configuration on the lower density portion receiving such units;
ii. The transfer does not reduce the minimum density achievable on the lot;
iii. The transfer enhances the efficient use of needed infrastructure;
iv. The transfer does not result in significant adverse impacts to the low density portion of the lot;
v. The transfer contributes to preservation of environmentally sensitive areas, wildlife corridors, or other natural features; and
vi. The transfer does not result in significant adverse impacts to adjoining lower density properties;
c. Compliance with these criteria shall be evaluated during review of any development proposals in which such a transfer is proposed; and
3. Uses on each portion of the lot shall only be those permitted in each zone pursuant to Chapter 21.05 SMC.
W. Sight Distance Requirements. Except for utility poles and traffic control signs, the following sight distance provisions shall apply to all street intersections and site access points:
1. A sight distance triangle area as determined by paragraph 2. below shall contain no fence, berm, vegetation, on-site vehicle parking area, signs or other physical obstruction between 42 inches and 8 feet above the existing street grade.

2. The sight distance triangle at:
a. A street intersection shall be determined by measuring 15 feet along both street property lines beginning at their point of intersection. The third side of the triangle shall be a line connecting the endpoints of the first two sides of the triangle; or
b. A site access point shall be determined by measuring 15 feet along the street lines and 15 feet along the edges of the driveway beginning at the respective points of intersection. The third side of each triangle shall be a line connecting the endpoints of the first two sides of each triangle.
c. The Director may require modification or removal of structures or landscaping located in required street setbacks, if:
d. Such improvements prevent adequate sight distance to drivers entering or leaving a driveway; and
e. No reasonable driveway relocation alternative for an adjoining lot is feasible.
X. Impervious Surface Standards.
1. Regional uses shall establish impervious surface standards at the time of permit review.
2. Nonresidential uses in residential zones shall comply with SMC 21.04.030.M.
3. A lot may increase beyond the total amount of permitted impervious surface in SMC 21.04.030 subject to approval of a conditional use permit.
4. In the R-1 zoning district:
a. Lots smaller than one-half acre in area shall comply with standards of the nearest comparable R-4 through R-8 zone.
b. For lots that are one-half acre in area or larger, the impervious surface area allowed shall be 10,000 square feet or 30 percent of the property, whichever is greater.
c. On any lot over one acre in area, an additional five percent of the lot area may be used for buildings related to agricultural or forestry practices.
d. For lots smaller than two acres but larger than one-half acre, an additional 10 percent of the lot area may be used for structures which are determined to be medically necessary, provided the applicant submits with the permit application a notarized affidavit, conforming with the requirements of SMC 21.05.030.H.1.b.
e. Public projects shall be subject to the applicable impervious surface provisions of the R-4 zone.
5. For school and government uses, maximum impervious surface limitations, minimum yard area requirements, and maximum lot coverage restrictions may be increased as part of the review of a Type 1, Type 2, or Type 3 permit application to accommodate instances where they render a necessary component of a project infeasible. Deviation from the maximum impervious surface limitations, minimum yard area requirements, and maximum lot coverage restrictions shall be granted if the following are satisfied:
a. the proposed increase is the minimum necessary to resolve the design conflict as demonstrated through written engineering analysis prepared by a qualified consultant and verified by the City;
b. the proposed increase will not result in impact to the root zone and tree protection areas required for retained significant trees under SMC 21.03.060.I; and
c. the project is compliant with applicable stormwater regulations.
Y. Site Planning Standards – Middle Housing Overlays.
1. Applicability. All residential development under this subsection must comply with the mandatory affordable housing requirements established in Chapter 21.10 SMC. When an affordable housing unit is built on site meeting the requirements of subsection Y.2 of this section, the affordable housing requirements of Chapter 21.10 SMC have been met.
2. Maximum Density. Allowable density in the middle housing overlays is defined by unit density (the number of units per lot) or net density (the number of units per acre), whichever results in the greater number of units. The maximum number of units in a single structure in any overlay is six.
MHO-1 | MHO-2 | MHO-3 | |||
|---|---|---|---|---|---|
Units/Lot | Units/Lot | Units/Acre | Units/Lot | Units/Acre | |
All lots | 3* | 3 | 12 | 3 | 18 |
Lots with one affordable unit or if existing home is retained** | 4* | 4 | 12 | 4 | 18 |
Lots 1/4-mile walking distance from an existing or planned transit stop | 4* | 4 | 12 | 4 | 18 |
*MHO-1 cottage allowance permitted in SMC 21.04.030.E.
**The unit density must not exceed 4 units in MHO-1 unless using the cottage allowance permitted in SMC 21.04.030.E.
3. Density Calculation Example. Three possible lot sizes in R-6 are used below to demonstrate how unit density and net density allowed under this section are calculated to determine which method results in the greatest number of units allowed by MHO-3. Additional calculation standards for allowable dwelling units and rounding of fractions are specified in subsection G of this section.
a. Seven thousand two hundred sixty square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (7,260/43,560) * 18 = 3 units.
b. Five thousand square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (5,000/43,560) * 18 = 2.1 units.
c. Nine thousand square-foot lot (net area excluding critical areas):
i. Unit density = 3 units.
ii. Net density (9,000/43,560) * 18 = 3.7 units.
4. Floor Area Ratio. Floor area ratio limits are based on the underlying district standards established in subsection C of this section with an increase of 0.15 FAR permitted per unit above one unit:
Floor Area Ratio (FAR) | |
|---|---|
Two Units | 0.65 |
Three Units | 0.80 |
Four Units | 0.95 |
Five Units | 1.10 |
Six Units | 1.25 |
5. Floor Area Ratio Calculation Example. The floor area ratio limitations are used to calculate the maximum allowable gross floor area across one or multiple structures on a site, based on the net lot area. For example, the total allowable gross floor area for three units on a 10,000 square-foot lot is 9,500 square feet (10,000 x 0.95). This area can be distributed in any way across the three units provided the buildings comply with the development regulations specified below. Gross square footage for the purpose of calculating FAR includes all gross square footage that is above grade including garages.
6. Unit Types. Unit types are used to establish general intensity options for each lot within MHO-1 and MHO-2. Possible configurations for each lot type are shown to encourage creative site and building design and to help expand housing options across Sammamish’s neighborhoods. The configurations shown are not an exhaustive list; additional configurations that fit within the rules of the overlays are encouraged.
a. Two-Unit Retaining Existing Structure.

b. Two-Unit Redevelopment.

c. Three-Unit Retaining Existing Structure.

d. Three-Unit Redevelopment.

e. Four-Unit Retaining Existing Structure.

f. Four-Unit Redevelopment.

7. Lot – Detached Configuration.

Note: Letters in each diagram correspond to letters in the tables below.
Lot – Detached Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table SMC 21.04.030.C | ||
D | |||
E | |||
F | Space Between Buildings (min) | 15 ft | 10 ft |
8. Parking and Access – Detached Configuration.

Parking and Access – Detached Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
9. Amenity Space – Detached Configuration.

Amenity Space – Detached Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
10. Building Form – Detached Configuration.

11. Lot – Attached Configuration.

Lot – Attached Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table 21.04.030.C | ||
D | |||
E | |||
12. Parking and Access – Attached Configuration.

Parking and Access – Attached Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
13. Amenity Space – Attached Configuration.

Amenity Space – Attached Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
14. Building Form – Attached Configuration.

Building Form – Attached Configuration
Height | ||
|---|---|---|
A | Height (max stories/feet) | 3/35 ft |
Massing | ||
Building Footprint (max per building) | 3,000 SF | |
Primary Street Width (up to 4 Units) | 60 ft | |
5+ Units (max) | 15 ft add’l per unit | |
Up to 2 Units (min) | 1 | |
3 – 4 Units (min) | 2 | |
5 – 6 Units (min) | 4 | |
B | Street-Facing Entry Spacing (max) | 20 ft |
C | Active Entry Depth (min) | 6 ft |
15. Lot – Stacked Configuration.

Lot – Stacked Configuration
Frontage | MHO-1 | MHO-2 | |
|---|---|---|---|
A | Lot Frontage (min) [driveway/no driveway] | 50 ft/30 ft | 50 ft/30 ft |
Coverage | |||
B | Hardscape Coverage (up to 2 units) | 40% | 60% |
3+ Units (max) | 50% | 70% | |
Building Placement | |||
C | Refer to underlying zone in table SMC 21.04.030.C | ||
D | |||
E | |||
16. Parking and Access – Stacked Configuration.

Parking and Access – Stacked Configuration
Pedestrian Access | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. | ||
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of one curb cut is permitted per street frontage. | ||
Parking Lot Location | ||
A | 5 ft behind building facade closest to street | |
B | 5 ft | |
C | 5 ft/10 ft | |
Required Parking Spaces | ||
Parking reduction allowed when sufficient street parking is available, as determined by parking study criteria established in SMC 21.06.030. | ||
Lots within 1/4 mile of existing or planned transit stop | No parking req. | |
All other lots | 1 stall per unit | |
17. Amenity Space – Stacked Configuration.

Amenity Space – Stacked Configuration
Amenity Space Required | |||
|---|---|---|---|
Amenity space must be exterior and may be provided either at grade as shared or private space, and/or on the structure as private balconies or roof decks. If a combination of amenity space types is being used, all spaces should add up to the greatest required total. | |||
Shared | |||
A | Area – at grade (min) | 15% of lot size | 150 sf per unit |
B | Area – on structure (min) | N/A | 30 sf per unit |
C | Minimum of smallest dimension | 10 ft | 8 ft at grade/4 ft on structure |
At Grade Amenity Space Location | |||
Amenity space at grade cannot be located within the front or side yard setbacks. | |||
18. Building Form – Stacked Configuration.

Z. MHO-1 Cottage Allowance.
1. Purpose. The purpose of this subsection is to provide additional density for cottage housing beyond the middle housing densities specified in subsection Y of this section. Cottage housing enhances the existing development pattern in the R-1 zone and is appropriate for an additional density allowance compared to other middle housing types. The MHO-1 cottage allowance only applies to cottage housing projects exceeding middle housing densities proposed within the MHO-1 overlay.
More extensive design standards are established for cottage housing to accommodate the increased density allowance. Unless specified below, all other development standards in the Sammamish Development Code apply.
2. Intent. Cottage housing is intended to be a more community-minded, smaller scale alternative to typical R-1 development. Smaller buildings create opportunities for higher densities while also allowing for a more sensitive response to vegetation, topography, and drainage.
Ideally, cottage housing will take the form of compact homes clustered in pockets around shared yards, scattered through the lush forest environment that defines the City. Unit clustering promotes a sense of community while providing flexibility to preserve site topography by minimizing grading, maintaining natural drainage patterns, and retaining existing vegetation. New landscaping should blend with or reinstate existing forest ecosystems. The presence of vehicles should be minimized. Opportunities to walk and bike around the site should be prioritized, and connections to existing trail systems within the neighborhood are encouraged.
See SMC 21.02.030, Neighborhood Design Standards, for further site design standards.
3. Application Requirements. In addition to the application requirements established in SMC 21.09.010, a tree retention and root zone protection plan is required as part of the preapplication process for cottage housing developments. The plan must include:
a. Location and size of all existing trees.
b. Approximate proposed building footprint locations demonstrating how the cottage cluster layout has been optimized using design flexibility to retain meaningful clusters of significant trees and associated middle and understory vegetation.
c. Clear indication of trees intended to be removed and retained, including replanting plans demonstrating compliance with the City’s tree preservation requirements in SMC 21.03.060.
4. Site Design Principles.
a. Site Entry. Cottage developments should have welcoming pedestrian entrances facing the ROW. Pedestrian entrances may incorporate gates, trellises, landscaping, benches, stacked stones, pillars, or other inviting ornamental features.
b. Private Yards. Private yards help to ensure the ongoing maintenance and sense of ownership within the site. Each unit must have an associated private yard that is clearly defined through the use of low fences, low stone walls, plantings, paving, or similar features. Private yards should encompass a series of spaces around the perimeter of a unit, creating a transitional buffer zone between the unit and the rest of the development. Providing private yard space with several different exposures, and access to sunlight at different times of year, is encouraged. Private yards may encroach into setbacks. Private yards may be forested.
c. Roofs. Gables, dormers, shed roofs, shed dormers, and upper level decks are all permitted as long as all roofs conform to the minimum pitch standards.
d. Community Buildings. Community buildings are intended to provide an indoor gathering place for residents, allowing for a variety of uses and serving as a location for events that individual units may not be able to accommodate. Community buildings are optional but strongly encouraged.
5. Lot – MHO-1 Cottage Allowance.

Lot – MHO-1 Cottage Allowance
Unit Density per Cluster | ||
|---|---|---|
Developments may have multiple clusters. | ||
A | Lot Line | |
Minimum Units per Cluster | 4 units | |
Maximum Units per Cluster | 12 units | |
Coverage | ||
B | Hardscape Coverage (max) | 40% |
Building Placement | ||
C | 20 ft | |
D | 25 ft | |
E | 20 ft/30 ft | |
F | Space Between Buildings (min) | 10 ft |
G | Unit Clustering (min) | 75% of all units must be included in a cluster |
6. Parking and Access – MHO-1 Cottage Allowance.

Parking and Access – MHO-1 Cottage Allowance
Pedestrian Access and Walkway Setbacks | ||
|---|---|---|
A walkway must connect the sidewalk or driveway to the main entrance. The first 80 sf of each walkway connecting to an existing trail will not be included in hardscape calculations. | ||
A | Walkway Setback From Primary Entrance Facade (min) | 10 ft |
B | Walkway Setback from Sides of Buildings (min) | 4 ft with landscaped privacy buffer or 8 ft of open space |
Vehicle Access | ||
If access is available from an alley which is open to traffic, there shall be no access allowed from the street. If allowed, a maximum of two curb cuts are permitted per street frontage with a minimum spacing of 100 ft. | ||
Parking Lot Location | ||
C | Set behind at least 1 building or screened with min. 15 ft landscape buffer so as not to be visible from the street. Buffer may be in setback. | |
D | 5 ft | |
E | Setback From Building (min) | 4 ft with landscaped privacy buffer or 8 ft of open space |
Required Parking Spaces | ||
Parking should be located and designed to preserve trees wherever possible. | ||
Minimum Off-Street Parking Required | 1 stall per unit | |
F | Parking Clusters Required (max) | 4 stalls per parking cluster or 5-ft-wide landscaped buffers every 3 stalls |
Garages | ||
G | Setback (min) | 10 ft from front of dwelling unit |
H | Orientation and Access | Vehicle access to the garage is not permitted from the front of the unit. |
I | Footprint (max) | 1 stall per unit/240 sf |
Building footprint/area calculations | Garages count toward hardscape coverage, but do not count towards building footprint or area calculations. | |
7. Amenity Space – MHO-1 Cottage Allowance.

Amenity Space – MHO-1 Cottage Allowance
Shared and Private Amenity Space Required | |||
|---|---|---|---|
Required amenity space must take the form of a shared yard as well as private yards for each unit. | |||
Shared Yards | |||
A | Area – at grade (min) | 300 sf per unit, 3,000 sf total minimum | 800 sf per unit |
B | Minimum of Smallest Dimension | 25 ft | none |
Community Buildings | |||
Community buildings must be located on the same site as the cottage housing development and be commonly owned by the residents. Community buildings must be enclosed structures and must contain at a minimum bathroom and kitchen facilities. Community buildings may also include event space, guest rooms, laundry facilities, or any other community-oriented amenity. | |||
Shared Yard Calculations | Community building floor area may be counted towards the shared yard calculation, provided the total minimum shared yard is still achieved. | ||
Density and Coverage Calculations | Community buildings count towards hardscape coverage calculations. | ||
Building Dimensional Standards | Community buildings must conform to the same dimensional standards as Type A cottages, with the exception of the building footprint. Upper levels must be 0.5 stories and will still conform to the upper-level ratio standard for Type A cottages. | ||
Footprint (min/max) | 500 sf minimum/80 sf per cottage maximum. | ||
8. Building Form – MHO-1 Cottage Allowance.

Building Form – MHO-1 Cottage Allowance
Two types of cottages are permitted to maximize flexibility in building placement and lot coverage while retaining existing site features. Projects are encouraged to mix cottage types to provide increased housing diversity. | |||
Type A Cottages | Type B Cottages | ||
|---|---|---|---|
Height | |||
A | Height (max stories/feet) | 1.5/26 ft | 2/28 ft |
Massing | |||
Building Footprint/Floor Area (max per building) | 900 sf | 1,000 sf total floor area | |
Partially Below Grade Floor Area: The floor area of portions of a cottage that are no more than 4 ft above grade will not be counted towards footprint or area calculations. This includes upper level ratio calculations, so that below grade floor area will not increase the potential size of an upper level. | |||
Upper-Level Habitable Space Ratio | Cannot exceed 80% of lower level gross floor area | Cannot exceed 100% of lower level floor area | |
B | Roof Pitch (min) | primary roof: 6:12 | primary roof: 6:12 |
Attached Units: Duplexes (no more than 2 attached units) are allowed. Attached units must each, individually, conform to the requirements of Column A or B. For example two attached cottages could have a combined footprint of up to 1,800 sf. | |||
Front Porches: Every unit must have a covered entry porch oriented toward common space or street. The porch must be open on at least two sides, and not be enclosed. Each porch must have a minimum area of 70 sf and a minimum dimension of 6 ft on all sides. Porches must be associated with primary point of entry. Porches may encroach into primary and side street setbacks. | |||
Orientation: At least 75% of interior-unit entries must face a shared yard. | |||
C | Active Entry Depth (min) | 6 ft | 6 ft |
(Ord. O2025-583 § 2 (Att. A.5, A.6); Ord. O2024-578 § 2 (Att. A); Ord. O2023-553 § 1 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Scope of Chapter. This chapter contains definitions of technical and procedural terms used throughout the code and definitions of land uses listed in tables in Chapter 21.05 SMC. The definitions in this chapter supplement the Standard Industrial Classification Manual (SIC). See Chapter 21.01 SMC for rules on interpretation of the code, including use of these definitions. Development standards are found in SMC 21.02.050, 21.03.020, 21.03.030, 21.03.060, 21.04.030, 21.05.020, 21.06.010 through 21.06.070, and 21.09.130. The city of Sammamish adopts by reference the definitions contained in WAC 197-11-700 through 197-11-799.
B. Definitions.
Abandoned vehicle. Any vehicle left upon the property of another without the consent of the owner of such property for a period of 24 hours or longer, except that a vehicle shall not be considered abandoned if its owner or operator is unable to remove it from the place where it is located and so notifies law enforcement officials and requests assistance.
Accessible electric vehicle charging station. An electric vehicle charging station where the battery charging station equipment is located within accessible reach of the barrier-free access aisle (minimum 36-inch width) and the electric vehicle.
Accessory dwelling unit. An attached, detached, or stacked dwelling unit located on the same lot as a single-family or multifamily dwelling unit.
Accessory living quarters. Living quarters in an accessory building for the use of the occupant or persons employed on the premises, or for temporary use of guests of the occupant. Such quarters have no kitchen and are not otherwise used as a separate dwelling unit.
Accessory use, commercial.
a. A use that is subordinate and incidental to a commercial use, including, but not limited to, the following uses:
i. Administrative offices;
ii. Employee exercise facilities;
iii. Employee food service facilities;
iv. Incidental storage of raw materials and finished products sold or manufactured on site;
v. Business owner or caretaker residence;
vi. Cogeneration facilities; and
vii. Ground maintenance facilities.
b. Some accessory uses within the scope of this section may be defined separately to enable the code to apply different conditions of approval.
Accessory use, residential.
a. A use, structure, or activity that is subordinate and incidental to a residence on the same parcel including, but not limited to, the following uses:
i. Accessory living quarters and dwellings;
ii. Fallout/bomb shelters;
iii. Keeping household pets;
iv. On-site rental office;
v. Pools, private docks, piers;
vi. Antennas for private telecommunication services;
vii. Storage of yard maintenance equipment;
viii. Storage of private vehicles, e.g., motor vehicles, boats, trailers or planes;
ix. Greenhouses;
x. Garages.
b. Some accessory uses within the scope of this section may be defined separately to enable the code to apply different conditions of approval.
Adjustment factor. A factor that, when applied to the reference evapotranspiration, adjusts for plant factors and irrigation efficiently.
Adult use facility. An enterprise predominantly involved in the selling, renting, or presenting for commercial purposes of books, magazines, motion pictures, films, video cassettes, cable television, live entertainment, performance, or activity distinguished or characterized by a predominant emphasis on the depiction, simulation, or relation to “specified sexual activities” as defined in this chapter for observation by patrons therein. Examples of such facilities include, but are not limited to, adult book or video stores and establishments offering panorams, peep shows, or topless or nude dancing.
“Affordable housing” and “affordable unit.” A dwelling unit(s) reserved for occupancy by eligible households and having monthly housing expenses to the occupant no greater than 30 percent of a given monthly household income, adjusted for household size, as follows:
a. Low Income. Eighty percent of the area median income.
b. Very Low Income. Fifty percent of area median income.
c. Extremely Low Income. Thirty percent of the area median income.
d. Pursuant to the authority of RCW 36.70A.540, the City finds that the higher income levels specified in the definition of “affordable housing” in this chapter, rather than those stated in the definition of “low-income households” in RCW 36.70A.540, are needed to address local housing market conditions in the City.
Agricultural product sales. The retail sale of items resulting from the practice of agriculture, including crops such as fruits, vegetables, grains, seed, feed, and plants, or animal products such as eggs, milk, and meat.
Airport/heliport. Any runway, landing area, or other facility, excluding facilities for the primary use of the individual property owner that are classified as helistops, designed or used by public carriers or private aircraft for the landing and taking off of aircraft, including the following associated facilities:
a. Taxiways;
b. Aircraft storage and tie-down areas;
c. Hangars;
d. Servicing; and
e. Passenger and air freight terminals.
AKART. All known, available, and reasonable methods of prevention, control, and treatment.
Alley. An improved thoroughfare or right-of-way, whether public or private, usually narrower than a street, that provides vehicular access to an interior boundary of one or more lots, and is not designed for general traffic circulation.
Alteration. Any human activity that results or is likely to result in an impact upon the existing condition of a critical area is an “alteration” that is subject to specific limitations as specified for each critical area. Alterations include, but are not limited to, grading, filling, dredging, draining, channelizing, applying herbicides or pesticides or any hazardous substance, discharging pollutants, except stormwater, grazing domestic animals, paving, constructing, applying gravel, modifying for surface water management purposes, cutting, topping, relocating or removing vegetation or any other human activity that results or is likely to result in an impact to existent vegetation, hydrology, fish or wildlife, or fish or wildlife habitat. Alterations do not include walking, fishing, or any other passive recreation or other similar activities.
Alternative water sources. Stored rainwater or treated or recycled wastewater of a quality suitable for uses such as landscape irrigation. Such water is not considered potable.
Amenity space. A designated space intended for recreational and social use, and the enjoyment and benefit of on-site residents and their guests. Shared amenity spaces are shared among all the units and must include some combination of seating, open lawn, barbeques, plantings, gardens for the use of residents, water features, or other recreational facilities. Private amenity spaces are for the exclusive use of one unit and may include some combination of the shared amenity space features.
Amusement arcades. A building or part of a building in which five or more pinball machines, video games, or other such player-operated amusement devices (excluding juke boxes or gambling-related machines) are operated.
Anadromous fish. Those that live part or the majority of their lives in saltwater, but return to freshwater to spawn.
Ancillary structure. For the purposes of this chapter, any form of development associated with a wireless communications facility, including but not limited to: foundations, concrete slabs on grade, guy anchors, generators, and feed lines; however, specifically excluding base stations.
Animal, small. Any animal other than livestock or animals considered to be predatory or wild that are kept outside a dwelling unit all or part of the time. Animals considered predatory or wild, excluding those in zoo animal breeding facilities, shall be considered small animals when they are taken into captivity for the purposes of breeding, domestication, training, hunting, or exhibition.
Applicant. A property owner or a public agency or public or private utility that owns a right-of-way or other easement or has been adjudicated the right to such an easement pursuant to RCW 8.12.090, or any person or entity designated or named in writing by the property or easement owner to be the applicant, in an application for a development proposal, permit or approval.
Application rate. The depth of water applied to an area expressed in inches per hour.
Area median income. The area median income for the Seattle-Bellevue, WA Metro Fair Market Rent (FMR) Area as most recently determined by the Department of Housing and Urban Development (HUD). In the event that HUD no longer publishes area median income figures for the Seattle-Bellevue FMR Area or King County, the City may use any other method for determining the median income.
Artist studio. An establishment providing a place solely for the practice or rehearsal of various performing or creative arts, including, but not limited to, acting, dancing, singing, drawing, painting, and sculpting.
Attached housing. Horizontal residential building configuration in which individual dwelling units share at least one wall. Examples include fee-simple or condominium townhomes or side-by-side duplexes, triplexes, or fourplexes. Accessory dwelling units attached to a principal residence are also considered attached housing.
Auction house. An establishment where the property of others is sold by a broker or auctioneer to persons who attend scheduled sales periods or events.
Barn. A large agricultural building for storage of agricultural products and sheltering livestock.
Base flood. A flood having a one percent chance of being equaled or exceeded in any given year, often referred to as the “100-year flood.”
Base flood elevation. The water surface elevation of the base flood in relation to the National Geodetic Vertical Datum of 1929.
Battery charging station. An electrical component assembly or cluster of component assemblies designed specifically to charge batteries within electric vehicles, which meets or exceeds applicable state and federal standards.
Battery electric vehicle (BEV). Any vehicle that operates exclusively on electrical energy from an off-board source that is stored in the vehicle’s batteries, and produces zero tailpipe emissions or pollution when stationary or operating (see “Electric vehicle”).
Battery exchange station. A fully automated facility that will enable an electric vehicle with a swappable battery to enter a drive lane and exchange the depleted battery with a fully charged battery through a fully automated process, which meets or exceeds applicable state and federal standards.
Bed and breakfast guesthouse. A dwelling unit or accessory building within which bedrooms are available for paying guests.
Beehive. A structure designed to contain one colony of honey bees (Apis mellifera).
Berm. A constructed area of compacted earth.
Best available science. The process used and information developed consistent with requirements in RCW 36.70A.172 and WAC 365-195-900 through 365-195-925. Additionally, consistent with federal guidance to recognize and incorporate indigenous knowledge (IK) in decision making, best available science may include IK as appropriate.
Billboard. A sign, including both the supporting structural framework and attached billboard faces, used principally for advertising a business activity, use, product, or service unrelated to the primary use or activity of the property on which the billboard is located; excluding off-premises directional, or temporary real estate signs.
Biologist. A person who has earned at least a Bachelor of Science degree in the biological sciences from an accredited college or university or who has equivalent educational training and experience.
Bioretention. A flow control best management practice consisting of a shallow landscaped depression designed to temporarily store and promote infiltration of stormwater runoff. Standards for bioretention design, including soil mix, plants, storage volume and feasibility criteria, are specified in Appendix C of the King County Surface Water Design Manual.
Book, stationery, video, and art supply store. An establishment engaged in the retail sale of books and magazines, stationery, records and tapes, video, and art supplies, including only uses located in SIC Industry Nos.:
a. 5942 – Book stores;
b. 5943 – Stationery stores;
c. 5999 – Architectural supplies and artists’ supply and materials stores;
d. 7841 – Video tape rental;
e. 5735 – Record, compact disc, and prerecorded tape stores; and
f. 5736 – Musical instrument stores.
Broadleaf tree. A tree characterized by leaves that are broad in width and may include both deciduous and evergreen species.
Buffer. A designated area contiguous to a steep slope or landslide hazard area intended to protect slope stability, attenuation of surface water flows and landslide hazards, or a designated area contiguous to a habitat conservation area, stream or wetland intended to protect the habitat, stream or wetland and be an integral part of the habitat, stream or wetland ecosystem.
Building. Any structure having a roof, including every building, house, structure, or other like object.
Building envelope. Area of a lot that delineates the limits of where a building may be placed on the lot.
Building facade. That portion of any exterior elevation of a building extending from the grade of the building to the top of the parapet wall or eaves, for the entire width of the building elevation
Building, hardware, and garden materials store. An establishment engaged in selling lumber and other building materials, feed, or lawn and garden supplies, including, but not limited to, uses located in SIC Major Group No. 52, Building materials, hardware, garden supply; excluding mobile home dealers.
Bulk gas storage tank. A tank from which illuminating, heating, or liquefied gas is distributed by piping directly to individual users.
Bulk retail. An establishment offering the sale of bulk goods to the general public, including limited sales to wholesale customers. These establishments offer a variety of lines of merchandise including but not limited to food, building, hardware and garden materials, dry goods, apparel and accessories, home furnishings, housewares, drugs, auto supplies, hobby, toys, games, photographic, and electronics.
Campground. An area of land developed for recreational use in temporary occupancy, such as tents or recreational vehicles without hook-up facilities.
Capacity, school. The number of students a school district’s facilities can accommodate district-wide, based on the district’s standard of service, as determined by the school district.
Capital facilities plan, school. A district’s facilities plan adopted by the school board consisting of:
a. A forecast of future needs for school facilities based on the district’s enrollment projections;
b. The long-range construction and capital improvements projects of the district;
c. The schools under construction or expansion;
d. The proposed locations and capacities of expanded or new school facilities;
e. At least a six-year financing plan component, updated as necessary to maintain at least a six-year forecast period, for financing needed school facilities within projected funding levels, and identifying sources of financing for such purposes, including bond issues authorized by the voters and projected bond issues not yet authorized by the voters;
f. Any other long-range projects planned by the district;
g. The current capacity of the district’s school facilities based on the district’s adopted standard of service, and a plan to eliminate existing deficiencies, if any, without the use of impact fees; and
h. An inventory showing the location and capacity of existing school facilities.
Catastrophic collapse. The collapse of the ground surface by overburden caving into underground voids created by mining. Catastrophic collapse does not include the effects from trough subsidence.
Cattery. A place where adult cats are temporarily boarded for compensation, whether or not for training. An adult cat is of either sex, altered or unaltered, that has reached the age of six months.
Cemetery, columbarium or mausoleum. Land or structures used for interment of the dead or their remains. For purposes of the code, pet cemeteries are considered a subclassification of this use.
Certified arborist. An individual that has successfully passed the certified arborist examination administered by the International Society of Arboriculture (ISA) and possesses a minimum of three years’ full-time experience working in the professional tree care industry.
Channel relocation and stream meander areas. Those areas subject to risk due to stream bank destabilization, rapid stream incision, stream bank erosion, and shifts in the location of stream channels.
Charging levels. The standardized indicators of electrical force or voltage at which an electric vehicle’s battery is recharged. Levels 1, 2, and 3 are the most common EV charging levels, and include the following specifications:
a. Level 1 is considered slow charging.
b. Level 2 is considered medium charging.
c. Level 3 is considered fast or rapid charging.
Church, synagogue, or temple. A place where religious services are conducted, including those uses located in SIC Industry No. 866 and including accessory uses in the primary or accessory buildings such as religious education, reading rooms, assembly rooms, and residences for nuns and clergy. This definition does not include facilities for training of religious orders.
City Council. The Sammamish City Council.
Classrooms, school. Educational facilities of the district required to house students for its basic educational program. The classrooms are those facilities the district determines are necessary to best serve its student population. Specialized facilities as identified by the district, including but not limited to gymnasiums, cafeterias, libraries, administrative offices, and child care centers, shall not be counted as classrooms.
Clearing. The limbing, pruning, trimming, topping, cutting or removal of vegetation or other organic plant matter by physical, mechanical, chemical or other means.
Co-living housing. A residential development with sleeping units that are independently rented and lockable and provide living and sleeping space, and residents share kitchen facilities with other sleeping units in the building. Co-living housing includes, but is not limited to, congregate living facilities, single room occupancy, rooming house, boarding house, lodging house, and residential suites.
Code interpretation. A formal statement regarding the meaning or requirements of a particular provision in the City of Sammamish’s development regulations.
Cogeneration. The sequential generation of energy and useful heat from the same primary source or fuel for industrial, commercial, or residential heating or cooling purposes.
Collective garden. Any area or location where qualifying patients engage in the production, processing, transporting, and delivery of marijuana for medical use.
Community identification sign. A sign identifying the location of a community or geographic area such as unincorporated activity centers or rural towns designated by the comprehensive plan or communities recognized and delineated by a recognized unincorporated area council.
Commuter parking lot. Vehicle parking specifically for the purpose of access to a public transit system or for users of carpools or vanpools.
Compensatory storage. New, excavated storage volume equivalent to any flood storage which is eliminated by building filling or grading within the floodplain. For the purpose of this definition, equivalent flood storage capacity is that which is replaced by equal volume between corresponding one-foot contour intervals that are hydraulically connected to the floodway through their entire depth.
Conditional use permit. A permit granted by the City to locate a permitted use on a particular property subject to conditions placed on the permitted use to ensure compatibility with nearby land uses.
Conference center. An establishment developed primarily as a meeting facility, including only facilities for recreation, overnight lodging, and related activities provided for conference participants.
Conservation easement. A legal agreement between a landowner and a land trust or government agency that permanently limits uses of the land in order to protect its nondevelopment values. It allows the landowner to continue to own and use the land, to sell it, or to pass it on to heirs. A conservation easement is placed on a sending site at the time development rights are sold from the property. The conservation easement typically prohibits any further development of the property but allows resource uses, such as farming and forestry, to continue.
Construction and trades. Establishments that provide services related to construction of buildings and infrastructure, and other improvements to property. Such establishments include SIC Major Group Nos. 15 – 17, and SIC Industry Group No. 078, Landscape and horticultural services.
Construction cost per student, school. The estimated cost of construction of a permanent school facility in the district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
Conversion factor. A number that converts the water budget allowance from acre-inches per acre per year to gallons per square foot per year or cubic feet per year.
Cooperative. An entity with up to four members located in the domicile of one of the members, registered with the Washington State Liquor and Cannabis Board, and meeting the requirements under Chapter 69.51A RCW where qualifying patients and designated providers share responsibility for acquiring and supplying the resources needed to produce and process marijuana for medical use of members of the cooperative.
Cottage cluster. A cottage cluster, or “cluster” when referred to in the context of cottage housing, refers to all units oriented towards and within 25 feet of a shared yard.
Courtyard apartment. Up to four attached dwelling units arranged on two or three sides of a yard or court.
Critical aquifer recharge areas. Those areas in the City of Sammamish with a critical recharging effect on aquifers used for potable water as defined by WAC 365-190-0302. CARAs have prevailing geologic conditions associated with infiltration rates that create a high potential for contamination of groundwater resources or contribute significantly to the replenishment of groundwater. CARAs shall be classified based on the following criteria:
a. Class 1 CARAs include those areas located within the mapped one- or five-year capture zone of a wellhead protection area.
b. Class 2 CARAs include those areas located within the mapped 10-year capture zone of a wellhead protection area.
c. Class 3 CARAs include those areas outside wellhead protection areas that are identified as high aquifer recharge potential areas based on characteristics of surficial geology and soil types.
Critical area enhancement. The manipulation of the physical, chemical, or biological characteristics of a critical area to heighten, intensify, or improve specific function(s). Enhancement does not result in a gain in the size of a critical area.
Critical area restoration. Voluntary measures taken to restore an altered or damaged natural feature, including:
a. Active steps taken to restore damaged wetlands, streams, protected habitat, or their buffers to the functioning condition that existed prior to an unauthorized alteration; and
b. Actions performed to reestablish structural and functional characteristics of a critical area that have been lost by alteration, past management activities, or catastrophic events.
Critical areas. Those areas in the City that are geologically hazardous areas, including erosion hazard areas, landslide hazard areas, seismic hazard areas (WAC 365-190-120); frequently flooded areas; critical aquifer recharge areas; wetlands, streams; and fish and wildlife habitat conservation areas.
Critical facility. A facility necessary to protect the public health, safety, and welfare and that is defined under the occupancy categories of “essential facilities,” “hazardous facilities,” and “special occupancy structures” in the Uniform Building Code. Critical facilities also include nursing homes, public roadway bridges, and sites for hazardous substance storage or production, not including the temporary storage of consumer products containing hazardous substances intended for household use or for retail sale on the site.
Daily care. Medical procedures, monitoring and attention that are necessarily provided at the residence of the patient by the primary provider of daily care on a 24-hour basis.
Daycare. An establishment for group care of nonresident adults or children.
a. Daycare shall include only SIC Industry No. 835, Child daycare services, SIC Industry No. 8322, Adult daycare centers, and the following:
i. Adult daycare, such as adult day health centers or social daycare as defined by the Washington State Department of Social and Health Services;
ii. Nursery schools for children under minimum age for education in public schools;
iii. Privately conducted kindergartens or pre-kindergartens when not a part of a public or parochial school; and
iv. Programs covering after-school care for school children.
b. Daycare establishments are subclassified as follows:
i. Daycare I – a maximum of 12 adults or children in any 24-hour period; and
ii. Daycare II – over 12 adults or children in any 24-hour period.
DBH. The diameter of a tree as measured at breast height (54 inches above the ground).
Deciduous. A plant species with foliage that is shed annually.
Demolition. Removal of more than 50 percent of a structure. For residential buildings, the removal of more than 50 percent of exterior walls. A wall, or portion of a wall, is deemed “removed” when its structure is removed or moved to another location or elevation on site, or when the wall is enclosed behind newly constructed space.
Density credit, transfer (TDC). The ability to transfer potentially buildable dwelling units from an eligible sending site to an eligible receiving site as provided in this code.
Department. The City’s Department of Community Development.
Department and variety store. An establishment engaged in the retail sale of a variety of lines of merchandise, such as dry goods, apparel and accessories, home furnishings, housewares, including only uses located in SIC Major Group and Industry Nos.:
a. 53 – General merchandise;
b. 5947 – Gift, novelty, and souvenir shops; and
c. 5948 – Luggage and leather goods stores.
Designated accessible space. A WAC 51-50-005 required accessible parking space designated for the exclusive use of parking vehicles with a State Disabled Parking Permit.
Destination resort. An establishment for resource-based recreation and intended to utilize outdoor recreational opportunities, including related services, such as food, overnight lodging, equipment rentals, entertainment, and other conveniences for guests of the resort.
Detached housing. Stand-alone dwelling units in which individual units are contained within discrete structures. Examples include but are not limited to traditional single-family homes, detached accessory dwelling units, manufactured homes, and cottage housing.
Developer or “applicant.” The person or entity who owns or holds purchase options or other development control over property for which development activity is proposed. (See “Applicant.”)
Development. The construction or exterior expansion of structures or buildings; clearing or grading; paving, landscaping, or placing of obstructions; and any project of a permanent or temporary nature exterior to a building.
Development activity. Any residential construction or expansion of a building, structure or use, any change in use of a building or structure, or any change in the use of land that creates additional demand for school facilities.
Development or activity of a linear nature. One that usually involves multiple parcels and/or that runs along a corridor or pathway defined in an adopted plan. Linear development and activities may be straight, curved or a combination of both. Examples include roads, trails, sidewalks, utility corridors, and other transportation facilities such as bikeways and railroads.
Development proposal. Any activities requiring a permit or other approval from the City of Sammamish relative to the use or development of land.
Development proposal site. The legal boundaries of the parcel or parcels of land for which an applicant has or should have applied for authority from the City of Sammamish to carry out a development proposal.
Development regulation. The controls placed on development or land use activities by the City, including but not limited to zoning ordinances, critical areas ordinances, shoreline master program requirements, official controls, subdivision ordinances, and binding site plan ordinances, together with any amendments thereto. A development regulation does not include a decision to approve a project permit application, as defined in RCW 36.70B.020, even though the decision may be expressed in an ordinance by the City.
Development right. An interest in and the right under current law to use and/or subdivide a lot for any and all residential, commercial, and industrial purposes.
Director. The Director of the City of Sammamish Department of Community Development or his/her designee.
DNS. Determination of nonsignificance.
Dormitory. A residential building that provides sleeping for residents such as students or those belonging to a religious organization. The building does not contain separate dwelling units, except for those created for resident administrator habitation, and may include common dining, cooking, recreation, or bathing facilities.
Drip line. An area encircling the base of a tree, the minimum extent of which is delineated by a vertical line extending from the outer limit of a tree’s branch tips down to the ground.
Drop box facility. A facility used for receiving solid waste and recyclables from off-site sources into detachable solid waste containers, including the adjacent areas necessary for entrance and exit roads, unloading and vehicle turnaround areas. Drop box facilities normally service the general public with loose loads and may also include containers for separated recyclables.
Drug store. An establishment engaged in the retail sale of prescription drugs, nonprescription medicines, cosmetics and related supplies, including only uses located in SIC Industry Group and Industry Nos.:
a. 591 – Drug stores and proprietary stores;
b. 5993 – Tobacco stores and stands; and
c. 5999 – Cosmetics stores.
DS. Determination of significance.
Duplex. A residential building with two attached or stacked dwelling units.
Dwelling unit. One or more rooms designed for occupancy by a person or persons for living and sleeping purposes, containing kitchen facilities and rooms with internal accessibility, for use solely by the dwelling’s occupants.
Dwelling unit, apartment. A dwelling unit contained in a building consisting of two or more dwelling units that may be stacked, or one or more dwellings with nonresidential uses.
Dwelling unit, single detached. A detached building containing one dwelling unit.
Dwelling unit, townhouse. A building containing one dwelling unit that occupies space from the ground to the roof, and is attached to one or more other townhouse dwellings by common walls.
Earth station. A communication facility that transmits and/or receives signals to and from an orbiting satellite using satellite dish antennas.
EIS. Environmental impact statement.
Electric scooters and motorcycles. Any two- or three-wheeled vehicle that operates exclusively on electrical energy from an off-board source that is stored in the vehicle’s batteries and produces zero emissions or pollution when stationary or operating.
Electric vehicle. Any vehicle that operates, either partially or exclusively, on electrical energy from the grid, or an off-board source, that is stored on-board for motive purposes. “Electric vehicle” includes (but is not limited to): 1. a battery electric vehicle; 2. a plug-in hybrid electric vehicle; 3. a neighborhood electric vehicle; and 4. a medium-speed electric vehicle.
Electric vehicle charging station. A public or private parking space located together with battery charging station equipment that has as its purpose the transfer of electric energy (by conductive or inductive means) to a battery or other storage device in an electric vehicle.
Electric vehicle charging station – public. An electrical charging station that is 1. publicly owned and publicly available (e.g., park and ride lots, City Hall parking, other public lots) or privately owned and publicly available (e.g., shopping centers, apartment complexes, parking garages, etc.).
Electric vehicle charging station – restricted. An electrical charging station that is 1. privately owned and restricted access (e.g., single-family, assigned parking, etc. or 2. publicly owned and restricted (fleet parking with no access to the public).
Electric vehicle infrastructure. Structures, machinery, and equipment necessary and integral to support an electric vehicle, including battery charging stations and battery exchange stations.
Electric vehicle parking space. Any marked parking space (public or private) that identifies the use to be for an electric vehicle.
Electrical substation. A site containing equipment for the conversion of high voltage electrical power transported through transmission lines into lower voltages transported through distribution lines and suitable for individual users.
Emergency. An unforeseen occurrence during which there is imminent danger to the public health, safety, and welfare, or which poses an imminent risk to property, as a result of a natural or manmade catastrophe as so declared by the director.
Emergency housing. Temporary indoor accommodations for individuals or families who are homeless or at imminent risk of becoming homeless that is intended to address the basic health, food, clothing, and personal hygiene needs of individuals or families. Emergency housing may or may not require occupants to enter into a lease or an occupancy agreement.
Emergency shelter. A facility that provides a temporary shelter for individuals or families who are currently homeless. Emergency shelters may not require occupants to enter into a lease or an occupancy agreement. Emergency shelter facilities may include day and warming centers that do not provide overnight accommodations.
Energy resource recovery facility. An establishment for recovery of energy in a usable form from mass burning or refuse-derived fuel incineration, pyrolysis, or any other means of using the heat of combustion of solid waste.
Enhancement. An action that increases the functions and values of a stream, wetland, or other sensitive area or buffer.
Equipment, heavy. High-capacity mechanical devices for moving earth or other materials, and mobile power units including, but not limited to:
a. Carryalls;
b. Graders;
c. Loading and unloading devices;
d. Cranes;
e. Drag lines;
f. Trench diggers;
g. Tractors;
h. Augers;
i. Bulldozers;
j. Concrete mixers and conveyers;
k. Harvesters;
l. Combines; or
m. Other major agricultural equipment and similar devices operated by mechanical power as distinguished from manpower.
Erosion. The process by which soil particles are mobilized and transported by natural agents such as wind, rainsplash, frost action or surface water flow.
Erosion hazard areas. Those areas in the City underlain by soils that are subject to severe erosion when disturbed. Such soils include those on slopes 15 percent or more and mapped by the USDA as one of the following soil types:
a. The Alderwood gravelly sandy loam (AgD);
b. The Alderwood and Kitsap soils (AkF);
c. The Beausite gravelly sandy loam (BeD and BeF);
d. The Everett gravelly sandy loam (EvD);
e. The Kitsap silt loam (KpD);
f. The Ovall gravelly loam (OvD and OvF);
g. The Ragnar fine sandy loam (RaD); and
h. The Ragnar-Indianola Association (RdE).
Eutrophic. A trophic status characterized by moderately high algal productivity, more serious oxygen depletion in the bottom waters, some recreational use impairment, summer chlorophyll a concentration greater than 10 micrograms/liter, a summer Secchi depth of less than two meters, and a winter total phosphorus concentration greater than 20 micrograms/liter.
Evergreen. A plant species with foliage that persists and remains green year-round.
Examiner. The Hearing Examiner as established by SMC 21.09.020.
Existing corridors. Areas that have been previously cleared of native vegetation, have historically been used for transportation or recreation purposes, have currently little or low-quality vegetation and habitat value, or that contain improvements such as graded or filled areas. Examples include but are not limited to utility corridors, road or railroad rights-of-way, roadbeds and rail beds.
Existing grade. The existing elevation of land prior to any cuts and fills or other disturbances, which may, at the discretion of the Director, be determined by a topographic survey or soil sampling.
FAA. The Federal Aviation Administration.
Fabric shop. An establishment engaged in the retail sale of sewing supplies and accessories, including only uses located in SIC Industry Nos.:
a. 5949 – Sewing, needlework, and piece goods stores; and
b. Awning shops, banner shops, and flag shops found in 5999.
Facilities standard. The space required by grade span, and taking into account the requirements of students with special needs, which is needed in order to fulfill the educational goals of the school district as identified in the district’s capital facilities plan.
Factory-built commercial building. Any structure that is either entirely or substantially prefabricated or assembled at a place other than a building site, and designed or used for nonresidential human occupancy.
Fairground. A site permanently designated and improved for holding a county fair, as provided in Chapters 15.76 and 36.37 RCW, or for holding similar events, including, but not limited to:
a. Carnivals;
b. Circuses;
c. Expositions;
d. Animal shows; and
e. Exhibitions and/or demonstrations of farm and home products with accompanying entertainment and amusements.
Family. One or more persons, either related or unrelated, living together as a single housekeeping unit.
Farmers’ market. An outdoor market held in public spaces which allows farmers and other vendors to sell produce and other locally produced products directly to the public.
FCC. The Federal Communications Commission.
Feasible. That an action, such as a development project, mitigation, or preservation requirement, meets all of the following conditions:
a. The action can be accomplished with technologies and methods that have been used in the past in similar circumstances, or studies or tests have demonstrated in similar circumstances that such approaches are currently available, likely to achieve the intended results, and impacts to critical areas have been avoided, where applicable;
b. Any unavoidable critical area impacts can be adequately mitigated;
c. The action provides a reasonable likelihood of achieving its intended purpose;
d. The action does not physically preclude achieving the project’s primary intended legal use. In cases where these guidelines require certain actions unless they are infeasible, the burden of proving infeasibility is on the applicant. In determining an action’s infeasibility, the reviewing agency may weigh the action’s relative public costs and public benefits, considered in the short- and long-term time frames.
Feed lines. Cables used as the interconnecting media between the transmission/receiving base station and the antenna.
Feed store. An establishment engaged in retail sale of supplies directly related to the day to day activities of agricultural production.
Fence. A barrier for the purpose of enclosing space or separating lots, composed of:
a. Masonry or concrete walls, excluding retaining walls; or
b. Wood, metal, or concrete posts connected by boards, rails, panels, wire or mesh.
Financial guarantee. A form of financial security posted to ensure timely and proper completion of improvements, to ensure compliance with the interim Sammamish Development Code, and/or to warranty materials, workmanship of improvements, and design. Financial guarantees include assignments of funds, cash deposit, and surety bonds, and/or other forms of financial security acceptable to the Director. For the purposes of this chapter, the terms “performance guarantee,” “maintenance guarantee,” and “defect guarantee” are considered subcategories of financial guarantee.
Fish and wildlife habitat conservation areas. Those areas that serve a critical role in sustaining needed habitats and species for the functional integrity of the ecosystem, and which, if altered, may reduce the likelihood that the species will persist over the long term. These areas may include, but are not limited to, rare or vulnerable ecological systems, communities, and habitat or habitat elements including seasonal ranges, breeding habitat, winter range, and movement corridors; and areas with high relative population density or species richness. The City of Sammamish has designated locally important habitats and species in SMC 21.03.020.W.1.
Fish and wildlife habitat corridors. Those corridors set aside and protected for preserving connections between habitats on development proposal sites that contain streams and/or wetlands with a moderate to high habitat score greater than or equal to six on the Washington State Wetland Rating System for Western Washington (Department of Ecology 2014 or as revised) that are located within 200 feet of an on-site or off-site stream and/or wetland with a moderate to high habitat score greater than or equal to six on the Washington State Wetland Rating System for Western Washington. Fish and wildlife habitat corridors do not increase stream buffers, except as required to provide a connection between two features as described above.
Flag. A fabric sheet of square, rectangular or triangular shape which is mounted on a pole, cable or rope at one end.
Flag, government. Any flag or badge or insignia of the United States, state of Washington, King County, City of Sammamish, or official historic plaque of any governmental jurisdiction or agency.
Flood fringe. That portion of the floodplain outside of the zero-rise floodway that is covered by floodwaters during the base flood, generally associated with standing water rather than rapidly flowing water.
Flood hazard areas. Those areas in the City of Sammamish subject to inundation by the base flood and those areas subject to risk from channel relocation or stream meander including, but not limited to, streams, lakes, wetlands, and closed depressions.
Flood insurance rate map. The official map on which the Federal Insurance Administration has delineated some areas of flood hazard.
Flood insurance study for King County. The official report provided by the Federal Insurance Administration that includes flood profiles and the flood insurance rate map.
Flood protection elevation. An elevation that is one foot above the base flood elevation.
Floodplain. The total area subject to inundation by the base flood.
Floodproofing. Adaptations that will make a structure that is below the flood protection elevation substantially impermeable to the passage of water and resistant to hydrostatic and hydrodynamic loads including the impacts of buoyancy.
Floodway, zero-rise. The channel of a stream and that portion of the adjoining floodplain which is necessary to contain and discharge the base flood flow without any measurable increase in flood height. A “measurable increase in base flood height” means a calculated upward rise in the base flood elevation, equal to or greater than .01 foot, resulting from a comparison of existing conditions and changed conditions directly attributable to development in the floodplain. This definition is broader than that of the FEMA floodway, but always includes the FEMA floodway. The boundaries of the 100-year floodplain, as shown on the flood insurance study for King County, are considered the boundaries of the zero-rise floodway unless otherwise delineated by a sensitive area special study.
Floor to area ratio. A measure of development intensity which is determined by dividing gross floor area by lot area.
Florist shop. An establishment engaged in the retail sale of flowers and plants, including only uses located in SIC Industry Nos.:
a. 5992 – Florists; and
b. 5999 – Artificial flowers.
Footprint. A two-dimensional outline of a structure or building where it intersects or covers the ground surface, including upper story eaves and cantilevers where they cover or overhang the ground surface.
Forest practice. Any activity regulated by the Washington Department of Natural Resources in WAC Title 222 or Chapter 76.09 RCW for which a forest practice permit is required, together with:
a. Fire prevention, detection and suppression; and
b. Slash burning or removal.
Forest product sales. The sale of goods produced, extracted, consumed, gathered or harvested from a forest including, but not limited to:
a. Trees;
b. Wood chips;
c. Logs;
d. Fuel wood;
e. Cones;
f. Christmas trees;
g. Berries;
h. Herbs; or
i. Mushrooms.
Forest research. The performance of scientific studies relating to botany, hydrology, silviculture, biology and other branches of science in relation to management of forest lands, including only uses located in SIC Industry Nos.:
a. 8731 – Commercial physical and biological research;
b. 8733 – Noncommercial research organizations; and
c. 8734 – Testing laboratories.
Frequently flooded areas. Those lands in the City in the floodplain subject to a one percent or greater chance of flooding in any given year and those lands that provide important flood storage, conveyance, and attenuation functions, as determined by the City in accordance with WAC 365-190-0803. Frequently flooded areas perform important hydrologic functions and may present a risk to persons and property. Frequently flooded areas include all areas of special flood hazards within the jurisdiction of the City of Sammamish.
Fourplex. A residential building with four attached or stacked dwelling units.
Furniture and home furnishings store. An establishment engaged in the retail sale of household furniture and furnishings for the home, including only uses located in SIC Major Group and Industry Nos.:
a. 57 – Home furniture, furnishings, and equipment stores, except Industry Group No. 573; and
b. Baby carriages, cake decorating supplies, hot tubs, picture frames (ready-made), swimming pools (above-ground, not site-built), telephone stores and typewriter stores found in 5999.
General business service. An establishment engaged in providing services to businesses or individuals, with no outdoor storage or fabrication, including only uses located in SIC Major Group Nos.:
a. 60 – Depository institutions;
b. 61 – Nondepository credit institutions;
c. 62 – Security and commodity brokers, dealers, exchanges, and services;
d. 63 – Insurance carriers;
e. 65 – Real estate, except 653 (Real estate agents and directors);
f. 67 – Holding and other investment offices;
g. 7299 – Miscellaneous personal services, not elsewhere classified;
h. 73 – Business services, except Industry Group and Industry Nos.:
i. 7312 – Outdoor advertising services; and
i. 86 – Membership organizations, including administrative offices of organized religions found in 8661, but excluding churches and places of worship.
Geologist. A professional who holds a current geologist license from the Washington State Geologist Licensing Board.
Geotechnical engineer. A practicing geotechnical/civil engineer licensed as a professional civil engineer by the state of Washington who has at least four years of professional employment as a geotechnical engineer.
Golf course. A recreational facility, under public or private ownership, designed and developed for golf activities with accessory uses including, but not limited to:
a. A driving range;
b. Miniature golf;
c. Pro shops;
d. Caddyshack buildings;
e. Swimming pools, tennis courts and other related recreational facilities;
f. Restaurants;
g. Office and meeting rooms; and
h. Related storage facilities.
Grade span. The categories into which a district groups its grades of students; i.e., elementary, middle or junior high school, and high school.
Grading. Any excavation, filling, removing the duff layer or any combination thereof.
Grazing area. Any open land area used to pasture livestock in which suitable forage is maintained over 80 percent of the area at all times of the year.
Gross square footage, residential accessory structures. Gross square footage includes all gross area that is above grade. Any visible wall height of more than three feet shall count towards the gross building square footage.
Gross square footage, single-family residence. Gross square footage includes all gross area that is above grade including garages. Any visible wall height of more than three feet shall count towards the gross building square footage.
Groundcover. Living plants designed to grow low to the ground (generally one foot or less) and intended to stabilize soils and protect against erosion.
Habitable space. Space in a structure for human activity including living, sleeping, eating, cooking, working, shopping, or bathroom facilities. Habitable space excludes parking garages, self-service storage facilities, warehouses, display windows separated from retail activity, closets, halls, storage, or utility spaces, and similar areas.
Hardscape coverage. Any impervious surface, area covered with gravel or other material that is not vegetation, area that precludes the growth of vegetation, and areas under overhangs that exceed 18 inches.
Hazardous household substance. A substance as defined in RCW 70.105.010.
Hazardous substance. A substance as defined in RCW 70.105.010.
Hazardous trees. Those trees with a structural defect, combination of defects or disease resulting in a structural defect that, under the normal range of environmental conditions at the site, will result in the loss of a major structural component of the tree in a manner that will:
a. Damage a residential structure or accessory structure, place of employment or public assembly or approved parking for a residential structure or accessory structure or place of employment or public assembly;
b. Damage an approved road or utility facility; or
c. Prevent emergency access in the case of medical hardship.
Heavy equipment and truck repair. The repair and maintenance of self-powered, self-propelled, or towed mechanical devices, equipment, and vehicles used for commercial purposes, such as tandem axle trucks, graders, backhoes, tractor trailers, cranes, lifts, but excluding automobiles and pick-up trucks under 10,000 pounds, recreational vehicles, boats, and their trailers.
Hedge. A row of five or more trees of the same species, densely planted to provide a landscape barrier or screen, maintained with ongoing pruning and shearing.
Helistop. An area on a roof or on the ground used for the takeoff and landing of helicopters for the purpose of loading or unloading passengers or cargo but not including fueling service, hangers, maintenance or overhaul facilities.
High voltage electrical transmission tower. A structure that is designed and constructed primarily for the purpose of overhead support of high voltage transmission lines. For purposes of this term, “high voltage transmission lines” shall generally mean and refer to a 68 kV or greater electric transmission line.
Historic resource. A district, site, building, structure or object significant in national, state or local history, architecture, archaeology, and culture.
Hobby, toy, and game shop. An establishment engaged in the retail sale of toys, games, hobby and craft kits, including only uses located in SIC Industry Nos.:
a. 5945 – Hobby, toy and game shops; and
b. 5999 – Autograph and philatelist supply stores, coin shops, and stamps, philatelist-retail (except mail order).
Home business. A business or profession which is incidental to the use of a residential dwelling unit by a resident of the dwelling unit. Home businesses do not include uses where the use of the premises as a dwelling unit is secondary to the operation of the business or profession. In no case shall the area used for a home business exceed 50 percent of the area of the residential dwelling unit.
The home business use definition does not include other residential accessory uses identified in Chapter 21.05 SMC and defined in this section, including but not limited to:
b. Senior citizen assisted housing;
c. Daycare 1; and
d. Specialized instructional schools.
Home businesses are further subclassified as follows:
e. Home business, Type 1 – conducted within a building permitted within a residential zone and that will not result in odors nor obvious visible or audible business activity outside of the building. Type 1 home businesses are generally indistinguishable from other dwelling units in the vicinity.
f. Home business, Type 2 – conducted within a building permitted within a residential zone and that results in limited odors, and some obvious visible or audible business activity outside of the building. Type 2 home businesses may be characterized by the following types of activities: significantly increased deliveries beyond regular residential mail delivery activity; significantly increased client or customer visitation to the site; and/or visual or audible activity visible from adjacent properties or the street. Home businesses that cannot meet the standards established in SMC 21.05.020.E.4 for Type 1 home businesses, are Type 2 home businesses and subject to the standards of SMC 21.05.020.E.5. Home businesses engaged in a use that requires a federal or state license or permit, in addition to a business license, are Type 2 home businesses (example: home businesses engaged in the production of alcohol such that a liquor license is required).
Home size. The gross square footage of a single-family residence.
Homeless encampment. A site for a group of homeless persons temporarily residing on a site, either out of doors or in a building.
House front. The facade of the house that faces a street with a clearly defined main entrance and walkway.
House rear. The facade of the house that faces the rear lot line or in the case of a lot with double frontages, the portion of the house facing the secondary street.
House side. The facade of the house that faces a side lot line; or for a house on a corner lot the side facing the secondary street frontage without the main entrance or a walkway.
Household pets. Small animals that are kept within a dwelling unit.
Housemover. Any person, firm, or corporation engaged in the business of moving houses, buildings, structures, or other like object.
Hydroelectric generation facility. An establishment for the generation of electricity using water sources.
Hypereutrophic. A trophic status characterized by high algal productivity, intense algal blooms, fish kills due to oxygen depletion in the bottom waters, frequent recreational use impairment, summer chlorophyll a concentration greater than 10 micrograms/liter, a summer Secchi depth generally less than two meters, and a winter total phosphorus concentration greater than 30 micrograms/liter.
Imminent risk. A risk to public health, safety, welfare, or property with a high probability of occurring at any time; an active and ongoing risk. See “Emergency.”
Impervious surface. For purposes of this chapter, a hard surface area that either prevents or retards the entry of water into the soil mantle as under natural conditions before development; or that causes water to run off the surface in greater quantities or at an increased rate of flow compared to the flow present under natural conditions prior to development.
Improved public roadways. Public road rights-of-way that have been improved with at least two travel lanes and are maintained by either the City of Sammamish or the state of Washington.
Individual transportation and taxi. An establishment engaged in furnishing individual or small group transportation by motor vehicle, including only uses located in SIC Industry Group and Industry Nos.:
a. 412 – Taxicabs; and
b. 4119 – Local passenger transportation, not elsewhere classified.
Infiltration rate. The rate of water entry into the soil expressed in inches per hour.
Interested person. Any person who receives written notice of a proposed land use action under the requirements of the SMC, or has requested of the responsible City official or the Community Development Director notification of proceedings or copies of orders, reports, recommendations, or decisions issued in the particular case, or who participates in a hearing by providing evidence, comment, or argument, or who participates in a neighborhood meeting.
Interim recycling facility. A site or establishment engaged in collection or treatment of recyclable materials, which is not the final disposal site, and including:
a. Drop boxes;
b. Source-separated, organic waste processing facilities; and
c. Collection, separation and shipment of glass, metal, paper or other recyclables.
Interlocal agreement. A legal contract between two or more local jurisdictions (cities and counties) that specifies the conditions under which development rights may be transferred (typically from an unincorporated county into an incorporated city). Interlocal agreements must be endorsed by the legislative bodies of both jurisdictions.
Irrigation efficiency. The coefficient of the amount of water beneficially used divided by the amount of water applied. This coefficient is derived from actual measurements and an evaluation of the general characteristics of the type of irrigation system and management practices proposed.
Jail. A facility operated by a governmental agency, designed, staffed and used for the incarceration of persons for the purposes of punishment, correction and rehabilitation following conviction of an offense.
Jewelry store. An establishment engaged in the retail sale of a variety of jewelry products, including only uses located in SIC Industry Nos.:
a. 5944 – Jewelry stores; and
b. Gem stones and rock specimens found in 5999.
Joint use driveway. A jointly owned and/or maintained vehicular access to two residential properties.
Kennel. A place where adult dogs are temporarily boarded for compensation, whether or not for training. An adult dog is one of either sex, altered or unaltered, that has reached the age of six months.
Kitchen or kitchen facility. An area within a building intended for the preparation and storage of food and containing:
a. An appliance for the refrigeration of food;
b. An appliance for the cooking or heating of food; and
c. A sink.
Lake management plan. The plan (and supporting documents as appropriate) describing the lake management recommendations and requirements.
Lakes. An open body of surface water, not including streams or rivers, that is 20 acres or greater in total area.
Landfill. A disposal site or part of a site at which refuse is deposited.
Landscape water features. A pond, pool or fountain used as a decorative component of a development.
Landscaping. Live vegetative materials required for a development. Said materials provided along the boundaries of a development site are referred to as perimeter landscaping.
Landslide. Episodic downslope movement of a mass including, but not limited to, soil, rock or snow.
Landslide hazard areas. Those areas in the City of Sammamish potentially subject to risk of mass movement due to a combination of geologic, topographic, and hydrologic factors. These areas are typically susceptible to landslides because of a combination of factors including: bedrock, soil, slope gradient, slope aspect, geologic structure, groundwater, or other factors. Landslide hazard areas include the following:
a. Areas of historic failures, such as:
i. Those areas mapped by the Department of Ecology Coastal Zone Atlas or the Department of Natural Resources slope stability mapping as unstable (“U” or class 3), unstable old slides (“UOS” or class 4), or unstable recent slides (“URS” or class 5); or
ii. Areas designated as quaternary slumps, earthflows, mudflows, or landslides on maps published by the U.S. Geological Survey or Department of Natural Resources or as amended;
b. Areas that have shown movement during the Holocene epoch, from 10,000 years ago to the present, or which are underlain by mass wastage debris from that epoch;
c. Any area with all three of the following characteristics:
i. Slopes steeper than 15 percent; and
ii. Hillsides intersecting geologic contacts with a relatively permeable sediment overlying a relatively impermeable sediment or bedrock; and
iii. Springs or groundwater seepage;
d. Areas with a slope of 40 percent or steeper and with a vertical relief of 10 or more feet except areas composed of consolidated rock. A slope is delineated by establishing its toe and top, as defined in this section, and measured by averaging the inclination over at least 10 feet of vertical relief;
e. Slopes that are parallel or subparallel to planes of weakness (such as bedding planes, joint systems, and fault planes) in subsurface materials;
f. Slopes having gradients steeper than 80 percent subject to rock fall during seismic shaking;
g. Areas potentially unstable because of rapid stream incision, stream bank erosion or undercutting by wave action;
h. Landslide hazard areas do not include those areas composed of slopes greater than 40 percent that were created from a previously non-landslide hazard area through legal grading activity and that are confirmed to be stable by a qualified professional;
i. Unconsolidated glacial deposits subject to elevated groundwater levels after prolonged rainfall or rain-on-snow events as designation criteria for a landslide hazard area; and
j. Areas located in a canyon or an active alluvial fan, presently or potentially subject to inundation by debris flows or catastrophic flooding.
Least visually obtrusive profile. The design of a wireless communication facility intended to present a visual profile that is the minimum profile necessary for the facility to properly function.
Level of service (LOS), traffic. The City’s defined performance standards for its adopted concurrency intersections, road corridors, and road segments, as defined in the City’s Comprehensive Plan and development regulations.
Light equipment. Hand-held tools and construction equipment, such as chain saws, wheelbarrows, and post-hole diggers.
Liquor and Cannabis Board (LCB). The Washington State Liquor and Cannabis Board which carries out Washington liquor, marijuana, and tobacco laws and regulations.
Livestock. Grazing animals kept either in open fields or structures for training, boarding, home use, sales, or breeding and production, including but not limited to:
a. Cattle;
b. Riding and draft horses;
c. Hogs, excluding pigs weighing under 120 pounds and standing 20 inches or less at the shoulder that are kept as pets or small animals;
d. Sheep; and
e. Goats.
Livestock, large. Cattle, horses, and other livestock generally weighing over 500 pounds.
Livestock sales. The sale of livestock but not including auctions.
Livestock, small. Hogs, excluding pigs weighing under 120 pounds and standing 20 inches or less at the shoulder that are kept as household pets or small animals, sheep, goats, miniature horses, llamas, alpaca, and other livestock generally weighing under 500 pounds.
Loading space. A space for the temporary parking of a vehicle while loading or unloading cargo or passengers.
Lot. A physically separate and distinct parcel of property and on lakefront properties above ordinary high water mark, which has been created pursuant to SMC 21.02.060, Land Division, or state law.
Lot coverage. The amount of a lot that a building footprint may cover. Lot coverage is expressed as a percent of the total lot area that a building or buildings may cover; for example, a 45 percent lot coverage standard indicates that 45 percent of the area of a lot may be covered by a building or combination of buildings.
Lot line, front yard. The property boundary or property line abutting a street right-of-way. For property that does not abut a street right-of-way and abuts an access easement or private street the front yard is that property boundary or property line from which the lot gains primary access.
Lot line, interior. Lot lines that delineate property boundaries along those portions of the property that do not abut a street.
Lot line, rear yard. The property boundary or property line opposite the front yard lot line. Provided, lots with more than one front yard, or triangular shaped lots with three sides, shall have no rear yard lot line.
Lot line, side yard. The property boundary or property line that delineates the property boundaries along the side portion of the property.
Lot, parent. A lot which is subdivided into unit lots through the unit lot subdivision process.
Lot, unit. A subdivided lot, that allows up to one dwelling unit, created from a parent lot and approved through the unit lot subdivision process.
Low impact development (LID). A stormwater and land use management strategy that strives to mimic predisturbance hydrological processes of infiltration, filtration, storage, evaporation and transpiration by emphasizing conservation, use of on-site natural features, site planning, and distributed stormwater management practices that are integrated into a project design.
Maintenance. Those usual acts to prevent a decline, lapse or cessation from a lawfully established condition or use. Maintenance may include an activity that restores the character, scope, size, and design of a serviceable area, structure, or land use to its previously authorized and undamaged condition. Activities that change the character, size, or scope of a project beyond the original design; expand impervious surfaces; or drain, dredge, fill, flood, or otherwise alter critical areas are not included in this definition.
Managing agency. An organization that is responsible for organizing and managing a homeless encampment. (Note: The managing agency may be the same entity as the sponsor.)
Marijuana or “marihuana.” All parts of the plant Cannabis, whether growing or not, with a THC concentration greater than 0.3 percent on a dry weight basis; the seeds thereof; the resin extracted from any part of the plant; and every compound, manufacture, salt, derivative, mixture, or preparation of the plant, its seeds or resin. The term does not include the mature stalks of the plant, fiber produced from the stalks, oil or cake made from the seeds of the plant, any other compound, manufacture, salt, derivative, mixture, or preparation of the mature stalks (except the resin extracted therefrom), fiber, oil, or cake, or the sterilized seed of the plant which is incapable of germination.
Marijuana concentrates. Products consisting wholly or in part of the resin extracted from any part of the plant Cannabis and having a THC concentration greater than 10 percent.
Marijuana-infused products. Products that contain marijuana or marijuana extracts, are intended for human use, are derived from marijuana, and have a THC concentration no greater than 10 percent. The term “marijuana-infused products” does not include either marijuana concentrates or useable marijuana.
Marijuana processor. A person or entity licensed by the Washington State Liquor and Cannabis Board (“LCB”) to process marijuana into marijuana concentrates, useable marijuana and marijuana-infused products, package and label marijuana concentrates, useable marijuana and marijuana-infused products for sale in retail outlets, and sell marijuana concentrates, useable marijuana and marijuana-infused products at wholesale to marijuana retailers.
Marijuana producer. A person or entity licensed by the LCB to produce and sell marijuana at wholesale to marijuana processors and other marijuana producer.
Marijuana retailer. A person or entity licensed by the LCB to sell marijuana concentrates, useable marijuana, and marijuana-infused products in a retail outlet.
Marina. An establishment providing docking, moorage space and related activities limited to the provisioning or minor repair of pleasure boats and yachts; and accessory facilities including, but not limited to:
a. Showers;
b. Toilets; and
c. Self-service laundries.
Master telecommunications plan. A plan developed to establish public policy and applicable development standards related to the deployment of wireless telecommunications infrastructure.
Material error. Substantive information upon which a permit decision is based that is submitted in error or is omitted at the time of permit application.
Medium-speed electric vehicle. A self-propelled, electrically powered four-wheeled motor vehicle, equipped with a roll cage or crush-proof body design, whose speed attainable in one mile is more than 25 miles per hour but not more than 35 miles per hour and otherwise meets or exceeds the federal regulations set forth in 49 CFR 571.500.
Mesotrophic. A trophic status characterized by moderate algal productivity, oxygen depletion in the bottom waters, usually no recreational use impairment, summer chlorophyll a concentration averaging four to 10 micrograms/liter, a summer Secchi depth of two to five meters, and a winter total phosphorus concentration ranging from 10 to 20 micrograms/liter.
Microclimate. A climatic condition in a relatively small area, within a few feet above and below the Earth’s surface and within canopies of vegetation. Microclimates are affected by such factors as temperature, humidity, wind and turbulence, dew, frost, heat balance, evaporation, the nature of the soil and vegetation, the local topography, latitude, elevation, and season. Weather and climate are sometimes influenced by microclimatic conditions, especially by variations in surface characteristics.
Microwave. Electromagnetic waves with a frequency range of 300 megahertz (MHz) to 300 gigahertz (GHz).
Middle housing. Dwelling units that are compatible in scale, form, and character with single-family houses and contain two or more attached, stacked, or clustered homes including duplexes, triplexes, fourplexes, townhouses, stacked flats, courtyard apartments, and cottage housing.
Mitigation bank. A property that has been protected in perpetuity, and approved by appropriate City, state, and federal agencies expressly for the purpose of providing compensatory mitigation in advance of authorized impacts through restoration, creation, and/or enhancement of wetlands and, in exceptional circumstances, preservation of adjacent wetlands, wetland buffers, and/or other aquatic resources.
Mitigation banking. A system for providing compensatory mitigation in advance of authorized wetland impacts of development in the City in which credits are generated through restoration, creation, and/or enhancement of wetlands and, in exceptional circumstances, preservation of adjacent wetlands, wetland buffers, and/or other aquatic resources.
Mobile home. A structure transportable in one or more sections; that in the traveling mode is eight body feet or more in width or 32 body feet or more in length; or when erected on site is 320 square feet or more in area; built on a permanent chassis; designed to be used as a dwelling unit, with or without permanent foundation, when connected to the required utilities; which contains plumbing, heating, air-conditioning and electrical systems; and shall include any structure that meets all the requirements of this section, or of Chapter 296-150B WAC, except the size requirements for which the manufacturer voluntarily complies with the standards and files the certification required by the Department of Housing and Urban Development (HUD).
Mobile home park. A development with two or more improved pads or spaces designed to accommodate mobile homes.
Monitoring. Evaluating the impacts of development proposals on biologic, hydrologic, and geologic systems and assessing the performance of required mitigation through the collection and analysis of data for the purpose of understanding and documenting changes in natural ecosystems, functions and features including, but not limited to, gathering baseline data.
Monuments, tombstones, and gravestones sales. The retail sale of custom stonework products including only uses located in SIC Industry No. 5599, Monuments, finished to custom order, tombstones and gravestones finished.
Motor vehicle, boat, and mobile home dealer. An establishment engaged in the retail sale of new and/or used automobiles, motor homes, motorcycles, trailers, boats, or mobile homes, including only uses located in SIC Major Group and Industry Group Nos.:
a. 55 – Automotive dealers and gasoline service stations, except:
i. 553 – Auto and home supply stores;
ii. 554 – Gasoline service stations;
b. Aircraft dealers found in 5599;
c. 527 – Mobile home dealers; and
d. Yacht brokers found in 7389.
Mulch. Any material such as leaves, bark, straw left loose and applied to the soil surface to reduce evaporation.
Native vegetation. Vegetation comprised of plant species, other than noxious weeds, which are indigenous to the coastal region of the Pacific Northwest and that reasonably could have been expected to naturally occur on the site.
Neighborhood electric vehicle. A self-propelled, electrically powered four-wheeled motor vehicle whose speed attainable in one mile is more than 20 miles per hour and not more than 25 miles per hour and conforms to federal regulations 49 CFR 571.500.
Net buildable area. The “site area” less the following areas:
a. Areas within a project site that are required to be dedicated for public rights-of-way in excess of 60 feet in width;
b. Sensitive areas and their buffers to the extent they are required by the City to remain undeveloped;
c. Areas required for stormwater control facilities other than facilities that are completely underground, including but not limited to retention/detention ponds, biofiltration swales and setbacks from such ponds and swales;
d. Areas required by the City to be dedicated or reserved as on-site recreation areas;
f. Other areas, excluding setbacks, required by the City to remain undeveloped.
Nonconformance. Any use, improvement or structure established in conformance with the City’s rules and regulations in effect at the time of establishment that no longer conforms to the range of uses permitted in the site’s current zone or to the current development standards of the code due to changes in the code or its application to the subject property.
Nonelectric vehicle. Any motor vehicle that does not meet the definition of “electric vehicle.”
Noxious weed. Any plant that is highly destructive, competitive, or difficult to control by cultural or chemical practices, limited to those plants on the state noxious weed list contained in Chapter 16-750 WAC.
Off-street required parking lot. Parking facilities constructed to meet the off-street parking requirements of SMC 21.06.030 for land uses located on a lot separate from the parking facilities.
Oligotrophic. A trophic status characterized by low algal productivity, algal blooms are rare, water clarity is high, all recreational uses unimpaired, summer chlorophyll a concentration average less than four micrograms/liter, a summer Secchi depth greater than five meters, and a winter total phosphorus concentration ranging from zero to 10 micrograms/liter.
One and one-half story. A building with an uppermost story containing space completely within a sloping roof, with rafters meeting the exterior wall not more than two feet from the top plate of the story below, and broken only by dormers.
Open-work fence. A fence in which the solid portions are evenly distributed and constitute no more than 50 percent of the total surface area.
Ordinary high water mark. The mark found by examining the bed and banks of a stream, lake, or tidal water and ascertaining where the presence and action of waters are so common and long maintained in ordinary years as to mark upon the soil a vegetative character distinct from that of the abutting upland. In any area where the ordinary high water mark cannot be found, the line of mean high water shall substitute. In any area where neither can be found, the top of the channel bank shall substitute. In braided channels and alluvial fans, the ordinary high water mark or line of mean high water shall be measured so as to include the entire stream feature.
Organic materials management facility. A facility that manages organic materials through composting, anaerobic digestion, vermiculture, black soldier fly, or similar technologies.
Outdoor performance center. An establishment for the performing arts with open-air seating for audiences. Such establishments may include related services such as food and beverage sales and other concessions.
Overspray. Irrigation water applied beyond the landscape area.
Park. A developed or undeveloped site designed or developed for recreational use by the public including, but not limited to:
a. Indoor facilities, such as:
i. Gymnasiums;
ii. Swimming pools; or
iii. Activity centers;
b. Outdoor facilities, such as:
i. Playfields;
ii. Fishing areas;
iii. Picnic and related outdoor activity areas; or
iv. Approved campgrounds;
c. Areas and trails for:
i. Hikers;
ii. Equestrians;
iii. Bicyclists; or
iv. Off-road recreational vehicle users;
d. Recreation space areas required under SMC 21.02.030.I;
e. Play areas required under SMC 21.02.030.K; and
f. Facilities for on-site maintenance.
Park service area. An area established by the Department, within which the dedications of land and fees received from new residential developments for the benefit of residents within such service area.
Parking lot aisle. That portion of the off-street parking area used exclusively for the maneuvering and circulation of motor vehicles and in which parking is prohibited.
Parking lot unit depth. The linear distance within which one parking aisle is flanked by accessible rows of parking stalls as measured perpendicular to the parking aisle.
Parking space. An area accessible to vehicles, improved, maintained and used for the sole purpose of parking a motor vehicle.
Parking space angle. Reference line, generally the property line or center line of an aisle, at which motor vehicles are to be parked.
Partially developed. A lot or lots where a portion of the lot or lots has been improved with a single-family home and associated appurtenances consistent with the underlying zoning designation, and the remaining portion of the lot or lots is unimproved and retains additional development right(s).
Party. The applicant, proponent, or petitioner; the owner(s) of property subject to a hearing; the responsible City official; or any other City official with jurisdiction or review authority over a proposal or proceeding; or anyone who has notified the Department in writing requesting to be a party to the proceeding.
A property owner who has authorized another individual to act as an agent for the development of a parcel of property is not a party unless he or she requests the Community Development Director to be designated as such. Persons joining in or concurring with an appeal or petition are not parties unless they have separately filed the requisite documents and fees for an appeal or petition.
Party of record. A person who has submitted written comments, testified, asked to be notified or is the sponsor of a petition entered as part of the official City record on a specific development proposal.
Peak hour. The hour during the morning or afternoon with the highest traffic volumes for a particular roadway or intersection.
Permanent school facilities. Facilities of a school district with a fixed foundation that are not relocatable facilities.
Permanent supportive housing. Subsidized, leased housing with no limit on length of stay that prioritizes people who need comprehensive support services to retain tenancy and utilizes admissions practices designed to use lower barriers to entry than would be typical for other subsidized or unsubsidized rental housing, especially related to rental history, criminal history, and personal behaviors. Permanent supportive housing is paired with on-site or off-site voluntary services designed to support a person living with a complex and disabling behavioral health or physical health condition who was experiencing homelessness or was at imminent risk of homelessness prior to moving into housing to retain their housing and be a successful tenant in a housing arrangement, improve the resident's health status, and connect the resident of the housing with community-based health care, treatment, or employment services.
Person. Includes individuals, corporations, partnerships, other formal associations, and governmental agencies.
Personal medical supply store. An establishment engaged in the retail sale of eyeglasses, contact lenses, hearing aids, and artificial limbs, including only uses located in SIC Industry Nos.:
a. 5995 – Optical goods stores; and
b. 5999 – Hearing aids and orthopedic and artificial limb stores.
Pet shop. An establishment engaged in the retail sale of pets, small animals, pet supplies, or grooming of pets, including only uses located in SIC Industry No. 5999, Pet shops.
Phosphorus. Elemental phosphorus and shall be measured as total phosphorus.
Phosphorus concentration. The mass of phosphorus per liquid volume.
Phosphorus loading. The total mass of phosphorus per time basis.
Photographic and electronic shop. An establishment engaged in the retail sale of cameras and photographic supplies, and a variety of household electronic equipment, including only uses located in SIC Industry No.:
a. 5946 – Camera and photographic supply stores;
b. 5999 – Binoculars and telescopes;
c. 5731 – Radio, television, and consumer electronics stores; and
d. 5734 – Computer and computer software stores.
Plant associations of infrequent occurrence. One or more plant species of a landform type that does not often occur in the City because of the rarity of the habitat and/or the species involved or for other botanical or environmental reasons.
Plant factor. A factor that when multiplied by reference evapotranspiration estimates the amount of water used by plants.
Plug-in hybrid electric vehicle (PHEV). An electric vehicle that 1. contains an internal combustion engine and also allows power to be delivered to drive wheels by an electric motor; 2. charges its battery by connecting to the grid or other off-board electric source; 3. may additionally be able to sustain battery charge using an on-board internal-combustion-driven generator; and 4. has the ability to travel short distances powered entirely by electricity.
Potable water. Water suitable for human consumption.
Private. Solely or primarily for the use of residents or occupants of the premises; e.g., a noncommercial garage used solely by residents or their guests is a private garage.
Private stormwater management facility. A surface water control structure installed by a project proponent to retain, detain or otherwise limit runoff from an individual or group of developed sites specifically served by such structure.
Professional office. An office used as a place of business by licensed professionals, or persons in other generally recognized professions, which use training or knowledge of a technical, scientific, or other academic discipline as opposed to manual skills, and that does not involve outside storage or fabrication, or on-site sale or transfer of commodities, including only the following SIC Major Group and Industry Nos.:
a. 64 – Insurance agents, brokers and service;
b. 653 – Real estate agents and directors;
c. 7291 – Income tax return preparation services;
d. 81 – Legal services;
e. 871 – Engineering, architectural and surveying services;
f. 872 – Accounting, auditing and bookkeeping services; and
g. 874 – Management and public relations services.
Public agency. Any agency, political subdivision, or unit of local government of this state including, but not limited to, municipal corporations, special purpose districts and local service districts, any agency of the state of Washington, the United States or any state thereof or any Indian tribe recognized as such by the federal government.
Public agency animal control facility. A facility for the impoundment and disposal of stray or abandoned small animals.
Public agency archive. A facility for the enclosed storage of public agency documents or related materials, excluding storage of vehicles, equipment, or similar materials.
Public agency or utility office. An office for the administration of any governmental or utility activity or program, with no outdoor storage and including but not limited to uses located in SIC Major Group, Industry Group and Industry Nos.:
a. 91 – Executive, legislative, and general government, except finance;
b. 93 – Public finance, taxation, and monetary policy;
c. 94 – Administration of human resource programs;
d. 95 – Administration of environmental quality and housing program;
e. 96 – Administration of economic programs;
f. 972 – International affairs;
g. 9222 – Legal counsel and prosecution; and
h. 9229 – Public order and safety.
Public agency or utility yard. A facility for open or enclosed storage, repair, and maintenance of vehicles, equipment, or related materials owned by a public agency or public utility, excluding document storage.
Public agency training facility. An establishment or school for training state and local law enforcement, fire safety, National Guard or transit personnel and facilities including but not limited to:
a. Dining and overnight accommodations;
b. Classrooms;
c. Shooting ranges;
d. Auto test tracks; and
e. Fire suppression simulations.
Qualified professional. A person with experience and training in the applicable field or critical area. A qualified professional must have obtained a B.S. or B.A. or equivalent degree in biology, engineering, environmental studies, fisheries, geomorphology or a related field, and two years of related work experience.
a. A qualified professional for watercourses, wetlands, and wildlife habitat conservation areas must have a degree in biology or a related field and relevant professional experience.
b. A qualified professional for preparing geotechnical reports and geotechnical design recommendations for erosion hazard areas must be a civil engineer with geotechnical certification licensed by the state of Washington. Where specified in code, a qualified professional for preparing geotechnical reports and geotechnical design recommendations for landslide hazard areas must be both a geotechnical engineer with a professional civil engineering license and a licensed geologist, licensed by the state of Washington, or geotechnical reports and geotechnical design recommendations must be prepared jointly by a licensed geotechnical engineer with a professional civil engineering license and a licensed geologist, licensed by the state of Washington.
c. A qualified professional for preparing critical aquifer recharge reports must be a professional hydrogeologist or geologist licensed in the state of Washington.
Rapid charging station. An industrial grade electrical outlet that allows for faster recharging of electric vehicle batteries through higher power levels and that meets or exceeds applicable state and federal standards.
Reasonable alternative. In determining what is a “reasonable alternative” to a proposed development, alteration or activity, the Department may consider the purpose, effectiveness, engineering feasibility, commercial availability of technology, best management practices, safety and cost of the alternative action or proposal. Reasonable alternatives are those that are capable of being carried out, taking into consideration the overall project purposes, needs and objectives.
Reasonable use. A legal concept articulated by federal and state courts in regulatory taking cases.
Receiving site. Those lots where the procurement of development rights enables a permissible change in the allowed intensity on the property pursuant to SMC 21.06.070 and all other controlling policies and law.
Recreational vehicle (RV). A vehicle designed primarily for recreational camping, travel, or seasonal use that has its own motive power or is mounted on or towed by another vehicle, including but not limited to:
a. Travel trailer;
b. Folding camping trailer;
c. Park trailer;
d. Truck camper;
e. Motor home; and
f. Multi-use vehicle.
Recreational vehicle parks. The use of land upon which two or more recreational vehicle sites, including hook-up facilities, are located for occupancy by the general public of recreational vehicles as temporary living quarters for recreation or vacation purposes.
Recyclable material. A nontoxic, recoverable substance that can be reprocessed for the manufacture of new products.
Reference evapotranspiration (Eto). A standard measurement of environmental parameters that affect the water use of plants.
Regional stormwater management facility. A surface water control structure installed in or adjacent to a stream or wetland of a basin or sub-basin by the surface water management (SWM) division. Such facilities protect downstream areas identified by SWM as having previously existing or predicted significant regional basin flooding or erosion problems.
Regional utility corridor. A right-of-way tract or easement other than a street right-of-way that contains transmission lines or pipelines for utility companies. Right-of-way tracts or easements containing lines serving individual lots or developments are not regional utility corridors.
Religious organization. The federally protected practice of a recognized religious assembly, school, or institution that owns or controls real property.
Relocatable facilities cost per student. The estimated cost of purchasing and siting a relocatable facility in a school district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
Relocatable facility. Any factory-built structure, transportable in one or more sections that is designed to be used as an education space and is needed to prevent the overbuilding of school facilities, to meet the needs of service areas within a district or to cover the gap between the time that families move into new residential developments and the date that construction is completed on permanent school facilities.
Responsible City official. The City of Sammamish official who has primary responsibility for coordinating the review of an application or appeal, or who issued the decision or recommendation, or took the action, which is the subject of the proceeding.
Retail, comparison. Provides for the sale of comparison goods and services and is centrally located in the community.
Retail, convenience. Provides for daily living goods, is easy to access and use and is close to residential neighborhoods.
Retaining wall. Any wall used to resist the lateral displacement of any material.
Riparian area. The area adjacent to flowing or standing freshwater aquatic systems. Riparian habitat encompasses the area beginning at the ordinary high water mark and extends to that portion of the terrestrial landscape that is influenced by, or that directly influences, the aquatic ecosystem. In riparian systems, the vegetation, water tables, soils, microclimate, and wildlife inhabitants of terrestrial ecosystems are often influenced by perennial or intermittent water. Simultaneously, adjacent vegetation, nutrient and sediment loading, terrestrial wildlife, as well as organic and inorganic debris, influence the biological and physical properties of the aquatic ecosystem. Riparian habitat includes the entire extent of the floodplain and riparian areas of wetlands that are directly connected to stream courses or other freshwater.
Runoff. Water not absorbed by the soil in the landscape area to which it is applied.
Salmonid. A member of the fish family Salmonidae, including:
a. Chinook, coho, chum, sockeye and pink salmon;
b. Rainbow, steelhead and cutthroat salmon;
c. Brown trout;
d. Brook and Dolly Varden char;
e. Kokanee; and
f. Whitefish.
Satellite public agency or utility yard. A small facility for open or enclosed storage and limited maintenance of vehicles or equipment used to maintain specific neighborhoods, parks, or areas of the City.
School bus base. An establishment for the storage, dispatch, repair, and maintenance of coaches and other vehicles of a school transit system.
School district. Any school district whose boundaries include the City of Sammamish.
School district support facility. Uses (excluding schools and bus bases) that are required for the operation of a school district. This term includes school district administrative offices, centralized kitchens, and maintenance or storage facilities.
Schools, elementary, and middle/junior high. Institutions of learning offering instruction in the several branches of learning and study required by the Education Code of the state of Washington in grades kindergarten through nine, including associated meeting rooms, auditoriums and athletic facilities.
Schools, secondary or high school. Institutions of learning offering instruction in the several branches of learning and study required by the Education Code of the state of Washington in grades nine through 12, including associated meeting rooms, auditoriums and athletic facilities.
Security or floodlighting fixtures. Generally intended to provide lighting that is designed and used to discourage crime and undesirable activity. Security or floodlighting fixtures are characterized by a broad intense beam of artificial light directed to illuminate a large area of a site.
Seismic hazard areas. Those areas determined to have susceptibility to liquefaction, surface rupture, seismically induced landslides, or lateral spreading as determined by a geotechnical investigation, or mapped as moderate to high and high liquefaction susceptibility and peat deposits on the Liquefaction Susceptibility Map of King County, Washington, Washington Division of Geology and Earth Sciences, OFR 2004-20, Palmer et al., September, 2004, as revised.
Self-service storage facility. An establishment containing separate storage spaces that are leased or rented as individual units.
Sending site. Designated lot or lots with development rights which landowners may sell in exchange for placing a conservation easement on the property or a portion of the property.
Senior assisted housing. Housing in a building consisting of two or more dwelling units or sleeping units restricted to occupancy by at least one senior per unit, and including the following support services:
a. Food preparation and dining areas;
b. Group activity areas;
c. Medical supervision; and
d. Similar activities.
Senior-oriented housing without these services is considered a type of co-housing.
Senior citizen. A person aged 62 or older.
Setback. The minimum required distance between a structure or a building and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures or buildings.
Setback, detached accessory dwelling unit. The minimum required distance between a detached accessory dwelling unit and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures.
Setback, single detached dwelling unit. The minimum required distance between a single detached dwelling unit and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures.
Setback, structure. The minimum required distance between a structure and a specified line such as a property line, lot line, access easement line, or buffer line that is required to remain free of structures or buildings.
Shelters for temporary placement. Housing units within the City that provide housing to persons on a temporary basis for a duration not to exceed four weeks.
Sign. Any device, structure, fixture, or placard that is visible from a public right-of-way or surrounding properties and uses graphics, symbols, or written copy for the purpose of advertising or identifying any establishment, product, goods, or service.
Sign, A-frame. A freestanding, two-panel, foldable, portable temporary sign made of rigid material.
Sign, awning. A sign painted on or attached directly to and supported by an awning. An awning may be constructed of rigid or nonrigid materials and may be retractable or nonretractable.
Sign, commercial. A sign erected for a business transaction or advertising the exchange of goods and services.
Sign, community banner. A temporary sign, located on City banner poles, which advertises an event that would provide civic, cultural, educational, philanthropic, or service opportunities hosted or promoted by the City or a community group that is not-for-profit or nonprofit and nonpolitical with an IRS designation of Section 501c. or d.
Sign, directional. A sign that is primarily designed to guide or direct pedestrian or vehicular traffic to an area, business, place, or convenience, and may include incidental graphics such as trade names and trademarks.
Sign, freestanding. A permanent sign fixed directly to the ground, or having one or more supports fixed directly to the ground, and being detached from any building or fence.
Sign, fuel price. A manually or electronically controlled sign utilized to advertise the price of gasoline and/or diesel fuel.
Sign, incidental. A sign, emblem or decal designed to inform the public of goods, facilities, or services available on the premises, and may include but not be limited to signs designating:
a. Restrooms;
b. Hours of operation;
c. Acceptable credit cards;
d. Property ownership or management;
e. Phone booths; and
f. Recycling containers.
Sign, indirectly illuminated. A sign that is illuminated entirely from an external artificial source.
Sign, monument. A freestanding sign that is above ground level and is anchored to the ground by a solid base, with no open space between the sign and the ground.
Sign, noncommercial. Any sign that is not a commercial sign. This definition also includes signs regarding fund raising or membership drive activities for noncommercial or nonprofit entities or groups.
Sign, off-premises directional. A sign that contains no advertising of a commercial nature that is used to direct pedestrian or vehicular traffic circulation to a facility, service, or business located on other premises within 660 feet of the sign.
Sign, on-premises. A sign that displays a message that is incidental to and directly associated with the use of the property on which it is located.
Sign, permanent. Any sign which is intended to be lasting and is constructed from an enduring material such as masonry and metal which remains unchanged in position, character, and condition (beyond normal wear), and is permanently affixed to the ground, wall or building, provided the sign is listed as a permanent sign in the ordinance.
Sign, permanent residential development identification. A permanent sign identifying the residential development upon which the sign is located.
Sign, pole. A freestanding sign having one or more supports standing directly upon the ground, and being detached from any building or fence.
Sign, portable. A sign that is capable of being moved and is not permanently affixed to the ground, a structure, or building.
Sign, projecting. Any sign that is attached to and supported by the exterior wall of a building with the exposed face of the sign on a plane perpendicular to the wall of the building, projecting more than one foot from the wall of a building and vertical to the ground.
Sign, temporary. Any sign, banner, pennant, or valance not permanently attached to the ground, wall or building, intended to be displayed for a limited period of time only.
Sign, wall. Any sign painted on, or attached directly to and supported by, the wall of a building or structure. All wall signs are building-mounted signs.
Sign, window. Any sign applied to or mounted on a window.
Site. A single lot, or two or more contiguous lots that are under common ownership or documented legal control, used as a single parcel for a development proposal in order to calculate compliance with the standards and regulations of this chapter.
Site area. The total horizontal area of a project site, less the following:
a. Areas below the ordinary high water mark;
b. Areas that are required to be dedicated on the perimeter of a project site for public rights-of-way.
Site cost per student. The estimated cost of a site in the district for the grade span of school to be provided, as a function of the district’s facilities standard per grade span and taking into account the requirements of students with special needs.
SITUS file. Information on an individual parcel of land, including its size, known extent of existing development, known environmental constraints, approval conditions and other site-specific information; a SITUS file is a King County file.
Source-separated organic material. Vegetative material, scrap lumber or wood, or other materials that provide a source for recycled or composted products. This does not include chemically treated wood products and/or toxic organic substances.
Special use permit. A permit granted by the City to locate a regional land use at a particular location, subject to conditions placed on the proposed use to ensure compatibility with adjacent land uses.
Specialized instruction school. Establishments engaged in providing specialized instruction in a designated field of study, rather than a full range of courses in unrelated areas; including, but not limited to:
a. Art;
b. Dance;
c. Music;
d. Cooking;
e. Driving; and
f. Pet obedience training.
Specified sexual activities. Human genitalia in a state of sexual stimulation or arousal; acts of human masturbation, sexual intercourse or sodomy; or erotic fondling, touching or display of human genitalia, pubic region, buttock, or female breast.
Sponsor. An entity that is hosting a homeless encampment on property it owns or controls and that serves as a liaison with the surrounding community.
Sporting goods store. An establishment engaged in the retail sale of sporting goods and equipment, including only uses located in SIC Industry Nos.:
a. 5941 – Sporting goods stores and bicycle shops; and
b. 5999 – Tent shops and trophy shops.
Sports club. An establishment engaged in operating physical fitness facilities and sports and recreation clubs, including only uses located in SIC Industry Nos.:
a. 7991 – Physical fitness facilities; and
b. 7997 – Membership sports and recreation clubs.
Stacked flat. Dwelling units in a residential building in which each floor may be separately rented or owned.
Stacked housing. Vertical residential building configuration with two or more dwelling units in which each floor may be separately rented or owned. Examples include vertically stacked duplexes, triplexes, fourplexes, sixplexes, or other mutliplex structures with at least one unit per floor.
Stable. A structure or facility in which horses or other livestock are kept for:
a. Boarding;
b. Training;
c. Riding lessons;
d. Breeding;
e. Rental; or
f. Personal use.
Standard of service, school districts. The standard adopted by each school district that identifies the program year, the class size by grade span and taking into account the requirements of students with special needs, the number of classrooms, the types of facilities the district believes will best serve its student population, and other factors as identified by the school district. The district’s standard of service shall not be adjusted for any portion of the classrooms housed in relocatable facilities that are used as transitional facilities or for any specialized facilities housed in relocatable facilities. Except as otherwise defined by the school board pursuant to a board resolution, “transitional facilities” shall mean those facilities that are used to cover the time required for the construction of permanent facilities; provided, that the “necessary financial commitments” as defined in SMC 21.06.040 are in place to complete the permanent facilities called for in the capital plan.
Steep slope hazard areas. Those landslide hazard areas in the City on slopes 40 percent or steeper within a vertical elevation change of at least 10 feet. A slope is delineated by establishing its toe and top and is measured by averaging the inclination over at least 10 feet of vertical relief. For the purpose of this definition:
a. The toe of a slope is a distinct topographic break in slope that separates slopes inclined at less than 40 percent from slopes 40 percent or steeper. Where no distinct break exists, the toe of a steep slope is the lowermost limit of the area where the ground surface drops 10 feet or more vertically within a horizontal distance of 25 feet; and
b. The top of a slope is a distinct, topographic break in slope that separates slopes inclined at less than 40 percent from slopes 40 percent or steeper. Where no distinct break exists, the top of a steep slope is the uppermost limit of the area where the ground surface drops 10 feet or more vertically within a horizontal distance of 25 feet.
c. A distinct topographic break occurs when the change in gradient is less than five feet vertically within a horizontal distance of 25 feet.
STEP housing. Collectively refers to emergency shelter, transitional housing, emergency housing, and permanent supportive housing.
Stream functions. Natural processes performed by streams including functions that are important in facilitating food chain production, providing habitat for nesting, rearing, and resting sites for aquatic, terrestrial, and avian species, maintaining the availability and quality of water, such as purifying water, acting as recharge and discharge areas for groundwater aquifers, moderating surface and stormwater flows and maintaining the free flowing conveyance of water, sediments, and other organic matter.
Streams. Those areas in the City where surface waters meet the criteria contained within WAC 222-16-030 and produce a defined channel or bed, not including irrigation ditches, canals, storm or stormwater runoff conveyance devices or other entirely artificial watercourses, unless they contain fish habitat or are used to convey streams naturally occurring prior to construction of such watercourses. For the purpose of this definition, a defined channel or bed is an area that demonstrates clear evidence of the passage of water and includes, but is not limited to, bedrock channels, gravel beds, sand and silt beds, and defined-channel swales. The channel or bed need not contain water year-round. For the purpose of defining the following categories of streams, normal rainfall is rainfall that is at or near the mean of the accumulated annual rainfall record, based upon the water year for King County as recorded at the Seattle-Tacoma International Airport.
a. Streams shall be classified according to the following criteria:
i. Type S streams are all streams inventoried as “shorelines of the state” under the City’s shoreline master program.
ii. Type F streams are segments of natural waters other than Type S waters, which are within the bankfull widths of defined channels and periodically inundated areas of their associated wetlands, or within lakes, ponds, or impoundments having a surface area of 0.5 acre or greater at seasonal low water and which in any case contain fish habitat as defined in WAC 222-16-030 (and WAC 222-16-031 as adopted by reference). Streams of special significance are those perennial reaches designated by the City based on historic fish presence and/or the probability of restoration of the following:
a) George Davis Creek;
b) Ebright Creek;
c) Pine Lake Creek; and
d) Laughing Jacobs Creek, below Laughing Jacobs Lake.
iii. Type Np streams are all segments of natural waters within the bankfull width of defined channels that are perennial nonfish habitat streams. Perennial streams are flowing waters that do not go dry any time of a year of normal rainfall and include the intermittent dry portions of the perennial channel below the uppermost point of perennial flow (WAC 222-16-030). If the uppermost point of perennial flow cannot be identified with simple, nontechnical observations, then the point of perennial flow should be determined using the best professional judgment of a qualified professional.
iv. Type Ns streams are all segments of natural waters within the bankfull width of the defined channels that are not Type S, F, or Np waters. These are seasonal, nonfish habitat streams in which surface flow is not present for at least some portion of a year of normal rainfall and are not located downstream from any stream reach that is a Type Np water. Ns waters must be physically connected by an above-ground channel system to Type S, F, or Np waters (WAC 222-16-030).
Street. A public or recorded private thoroughfare providing pedestrian and vehicular access through neighborhoods and communities and to abutting property.
Street frontage. Any portion of a lot or combination of lots that directly abuts a public right-of-way.
Street, primary. A primary street is the street with a higher street classification such as an arterial or collector street. Lots with two frontages on streets of the same classification may choose either street as the primary street frontage.
Structure. Anything permanently constructed in or on the ground, or over the water, excluding fences six feet or less in height, uncovered decks less than 18 inches above grade, uncovered paved areas, and structural or nonstructural fill.
Student factor. The number derived by a school district to describe how many students of each grade span are expected to be generated by a dwelling unit. Student factors shall be based on district records of average actual student generated rates for new developments constructed over a period of not more than five years prior to the date of the fee calculation; if such information is not available in the district, data from adjacent districts, districts with similar demographics, or countywide averages must be used. Student factors must be separately determined for single-family and multifamily dwelling units, and for grade spans.
Submerged land. Any land at or below the ordinary high water mark.
Substantial improvement. Any maintenance, repair, structural modification, addition, or other improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure either before the maintenance, repair, modification or addition is started or before the damage occurred, if the structure has been damaged and is being restored.
TDR certificate. A form of currency that represents development rights available for sale and use.
TDR certificate of intent. A document issued to a landowner upon approval of a TDR sending site application. The letter contains a determination of the number of development rights calculated for the sending site and an agreement by the City to issue a corresponding number of TDR certificates in exchange for a conservation easement. The sending site owner may use the TDR certificate letter of intent to market development rights to potential purchasers, but the letter of intent document has no value itself and cannot be transferred or used to obtain increased development rights within receiving areas.
TDR program. A market-based program that permanently conserves lands with important public benefits by establishing a means to transfer development rights from eligible sending sites to eligible receiving sites through a voluntary process that fairly compensates landowners while providing a public benefit for communities.
TDR sending site application. An application that a sending site landowner must file in order to be eligible for consideration for designation as a TDR sending site.
Temporary use permit. A permit to allow a use of limited duration and/or frequency, or to allow multiple related events over a specified period.
Theater. An establishment primarily engaged in the indoor exhibition of motion pictures or of live theatrical presentations.
Theatrical production services. An establishment engaged in uses located in SIC Industry No. 792, Theatrical producers (except motion picture), bands, orchestras, and entertainers, except establishments primarily engaged in providing live theatrical presentations, such as road companies and summer theaters.
Tightline sewer. A sewer trunk line designed and intended specifically to serve only a particular facility or place, and whose pipe diameter should be sized appropriately to ensure service only to that facility or place. It may occur outside the local service area for sewers, but does not amend the local service area.
Tiny houses. Including tiny houses on wheels, are defined as dwellings to be used as permanent housing with permanent provisions for living, sleeping, eating, cooking, and sanitation built in accordance with the State Building Code.
Total phosphorus. The phosphorus concentration as determined by a state-certified analytical laboratory using EPA 365.3 or SM 4500-P-B, E or an equivalent method.
Townhouses. Buildings that contain three or more attached single-family dwelling units that extend from foundation to roof and that have a yard or public way on not less than two sides.
Trails. Manmade pathways designed and intended for use by pedestrians, bicyclists, equestrians, and/or recreational users. Trails may be paved or unpaved, and may be intended and constructed for transportation, recreation, and nature contact and enjoyment. Types of trails are described and defined in the park and recreation plan, trails, bikeways and paths plan, or elsewhere in the city Comprehensive Plan.
Transfer of development rights (TDR). The transfer of the right to develop or build from sending sites to receiving sites.
Transfer station. A staffed collection and transportation facility used by private individuals and route collection vehicles to deposit solid waste collected off-site into larger transfer vehicles for transport to permanent disposal sites, and may also include recycling facilities involving collection or processing for shipment.
Transit bus base. An establishment for the storage, dispatch, repair and maintenance of coaches, light rail trains, and other vehicles of a public transit system.
Transit stop, existing. An existing public transit stop identified in the City’s Transportation Master Plan or Citywide Transit Plan.
Transit stop, planned. A planned public transit stop identified in the City’s Transportation Master Plan or Citywide Transit Plan.
Transitional housing. A project that provides housing and supportive services to homeless persons or families and that has as its purpose facilitating the movement of homeless persons and families into independent living, generally in less than two years.
Transitional housing facilities. Housing units within the City owned by public housing authorities, nonprofit organizations or other public interest groups that provide housing to persons on a temporary basis for a duration not to exceed 24 months in conjunction with job training, self sufficiency training, and human services counseling, the purpose of which is to help persons make the transition from homelessness to placement in permanent housing.
Transportation system management (TSM). Low-cost projects that can be implemented in a short time frame designed to increase the efficiency of existing transportation facilities. This also includes transit and/or ride sharing measures to decrease single occupancy vehicle trips.
Tree, heritage. A tree that is equal to or greater than 22 inches DBH.
Tree, landmark. A tree that is equal to or greater than 32 inches DBH.
Tree, significant. A tree that is in a healthy condition and is a noninvasive species, including those trees defined as a heritage tree and landmark tree, that is:
a. A coniferous tree with a diameter of eight inches or more DBH; or
b. A deciduous tree with a diameter of 12 inches or more DBH.
Triplex. A residential building with three attached or stacked dwelling units.
Trophic state index. A classification system which uses algal biomass as the basis for classification which can be independently measured by chlorophyll a, Secchi depth, and total phosphorus concentration.
Trophic status. A classification which defines lake quality by the degree of biological productivity.
Ultimate roadway section. A designation by the City that the maximum roadway or intersection capacity has been reached and further right-of-way acquisition and/or improvements are not feasible to increase peak hour vehicle capacity.
Underground injection control (UIC) well. A well that is used to discharge fluids from the ground surface into the subsurface and is one of the following:
a. A bored, drilled or driven shaft, or dug hole whose depth is greater than the largest surface dimension; or
b. A dug hole whose depth is greater than the largest surface dimension; or
c. An improved sinkhole; which is a natural crevice that has been modified; or
d. A subsurface fluid distribution system which includes perforated pipes, drain tiles or other similar mechanisms intended to distribute fluids below the surface of the ground.
Examples of UIC wells or subsurface infiltration systems include:
Drywells;
On-site septic drainfields;
Infiltration trenches with perforated pipe;
Storm chamber systems with the intent to infiltrate;
French drains;
Bioretention systems intending to infiltrate water from a perforated pipe below the treatment soil; and
Other similar devices that discharge to the ground.
Underground storage tank (UST). A tank and any underground piping connected to the tank that has at least 10 percent of its combined volume underground and is used for the storage of hazardous substances. USTs are generally associated with industrial/commercial land uses and can be found at filling stations, airports, hospitals, automotive repair shops, industrial plants, residential areas and other facilities. The definition of UST does not include underground facilities for the storage or treatment of stormwater or for the storage of nonhazardous substances, such as drinking water.
Unit density. The number of dwelling units allowed on a lot, regardless of lot size.
Unit lot subdivision. A subdivision process by which boundary lines and use areas are defined within a larger “parent” lot to establish individual sellable lots, allowing for the creation of fee simple lots.
Use. Activity or function carried out on an area of land, or in a building or structure located thereon. Any use subordinate or incidental to the primary use on a site is considered an accessory use.
Utility facility. A facility for the distribution or transmission of services to an area, including, but not limited to:
a. Telephone exchanges;
b. Water pumping or treatment stations;
d. Water storage reservoirs or tanks;
e. Municipal groundwater well-fields;
g. Natural gas gate stations and limiting stations;
h. Propane, compressed natural gas and liquefied natural gas storage tanks serving multiple lots or uses from which fuel is distributed directly to individual users;
i. Sewer lift stations; and
j. Pipes, electrical wires and associated structural supports.
Vactor waste. Liquid or solid waste material collected from catch basins, retention/detention facilities or drainage pipes.
Vactor waste receiving facility. A facility where vactor waste is brought for treatment and storage prior to final disposal.
Variance. An adjustment in the application of standards of a zoning code to a particular property.
Vegetation. Any and all plant life growing at, below or above the soil surface.
Vocational school. Establishments offering training in a skill or trade to be pursued as a career, including only uses located in SIC Industry Group Nos.:
a. 824 – Vocational schools; and
b. 8222 – Technical institutes.
Warehousing and wholesale trade. Establishments involved in the storage and/or sale of bulk goods for resale or assembly, excluding establishments offering the sale of bulk goods to the general public that is classified as a retail use in SMC 21.05.010.S. These establishments shall include only SIC Major Group Nos. 50 and 51 and SIC Industry Group Nos. 422 and 423.
Wastewater treatment facility. A plant for collection, decontamination, and disposal of sewage, including residential, industrial, and agricultural liquid wastes, and including any physical improvement within the scope of the definition of “water pollution control facility” set forth in WAC 173-90-0154, as amended.
Water budget. The upper limit of irrigation water applied to the established landscape area.
Water-dependent use. A use or portion of a use which cannot exist in a location that is not adjacent to the water and which is dependent on the water by reason of the intrinsic nature of its operations.
Water-enjoyment use. A recreational use or other use that facilitates public access to the shoreline as a primary characteristic of the use; or a use that provides for recreational use or aesthetic enjoyment of the shoreline for a substantial number of people as a general characteristic of the use and which, through location, design, and operation, ensures the public’s ability to enjoy the physical and aesthetic qualities of the shoreline. In order to qualify as a water-enjoyment use, the use must be open to the general public and the shoreline-oriented space within the project must be devoted to the specific aspects of the use that fosters shoreline enjoyment.
Water-oriented use. A use that is water-dependent, water-related, or water-enjoyment, or a combination of such uses.
Water-related use. A use or portion of a use which is not intrinsically dependent on a waterfront location but whose economic viability is dependent upon a waterfront location because:
a. The use has a functional requirement for a waterfront location such as the arrival or shipment of materials by water or the need for large quantities of water; or
b. The use provides a necessary service supportive of the water-dependent uses and the proximity of the use to its customers makes its services less expensive and/or more convenient.
Wetland creation. The manipulation of the physical, chemical, or biological characteristics present to develop a wetland that did not previously exist at an upland site. Creation results in a gain in wetland area and functions. A typical action is the excavation of upland soils to elevations that will produce a wetland hydroperiod and hydric soils, and support the growth of hydrophytic plant species.
Wetland edge. The line delineating the outer edge of a wetland, as determined by application of the federal 1987 Wetland Delineation Manual (Environmental Laboratory, 1987) and the United States Army Corps of Engineers (USACE) Interim Regional Supplement for Western Mountains, Valleys, and Coast Region (USACE, 2010), or such other manual(s) adopted by the Department consistent with RCW 90.58.380 and WAC 173-22-035, as amended.
Wetland functions. Natural processes performed by wetlands including functions that are important in facilitating food chain production, providing habitat for nesting, rearing, and resting sites for aquatic, terrestrial, and avian species, maintaining the availability and quality of water, acting as recharge and discharge areas for groundwater aquifers and moderating surface and stormwater flows, as well as performing other functions including, but not limited to, those set forth in 33 CFR 320.4(b)(2), 1988.
Wetland, isolated. A wetland that is hydrologically isolated from other aquatic resources. Isolated wetlands may perform important functions and are protected by state law (Chapter 90.48 RCW), whether or not they are protected by federal law. The term “isolated wetland” shall not apply within the City’s shoreline jurisdiction as set forth in Chapter 25.05 SMC.
Wetland mosaic. An area with a concentration of multiple small wetlands, in which each patch of wetland is less than one acre; patches are less than 100 feet from each other; and areas delineated as wetland are more than 50 percent of the total area of the entire mosaic, including uplands and open water.
Wetland reestablishment. The manipulation of the physical, chemical, or biological characteristics of a site with the goal of returning natural/historic functions and environmental processes to a former wetland. Reestablishment results in rebuilding a former wetland and results in a gain in wetland area and functions.
Wetland rehabilitation. The manipulation of the physical, chemical, or biological characteristics of a site with the goal of repairing natural/historic functions and environmental processes to a degraded wetland. Rehabilitation results in a gain in wetland function, but does not result in a gain in wetland acres.
Wetlands. Wetlands are areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetlands generally include swamps, marshes, bogs and similar areas. Wetlands do not include those artificial wetlands intentionally created from nonwetland sites, including, but not limited to, irrigation and drainage ditches, grass-lined swales, canals, detention facilities, wastewater treatment facilities, farm ponds, and landscape amenities, or those wetlands created after July 1, 1990, that were unintentionally created as a result of the construction of a road, street, or highway. Wetlands may include those artificial wetlands intentionally created from nonwetland areas to mitigate the conversion of wetlands.
Wetlands of local significance. The wetland identified in the King County Council Wetlands Inventory (1990) as the East Lake Sammamish No. 21 wetland (North Beaver Lake Bog), and others as designated by the City Council. Wetlands of local significance shall be subject to greater protection and environmental education efforts where possible.
Wetpond. An artificial water body constructed as a part of a surface water management system.
Wildlife shelter. A facility for the temporary housing of sick, wounded, or displaced wildlife.
Work release facility. A facility that allows the opportunity for convicted persons to be employed outside of the facility, but requires confinement within the facility when not in the place of employment.
Wrecked, dismantled, or inoperative vehicle. A motor vehicle or the remains or remnant parts of a motor vehicle that is mechanically inoperative and cannot be made operative without the addition of vital parts or mechanisms or the application of a substantial amount of labor, and meets at least three of the following requirements:
a. Is three years old or older;
b. Is extensively damaged, such damage including but not limited to any of the following: missing wheels, tires, motor, or transmission;
c. Is apparently inoperable;
d. Has an approximate fair market value equal only to the approximate value of the scrap in it.
Yard. Any surface area that is not structured or hardened. Yard areas may be landscaped, contain uncovered decks of less than 18 inches above grade, and artificial turf, but do not include areas covered by pervious concrete or other similar materials.
Yard or organic waste processing facility. A site where yard and garden wastes, including wood and land clearing debris, are processed into new products such as soil amendments and wood chips. (Ord. O2025-583 § 2 (Att. A.7); Ord. O2024-578 § 2 (Att. A); Ord. O2024-571 § 2 (Att. A); Ord. O2023-553 § 1 (Att. A); Ord. O2021-540 § 2 (Att. A))
A. Purpose. The purpose of this chapter is to provide a set of general terms and designations, including definitions and standards, for terminology primarily used in this chapter. Definitions and standards for terms used more broadly throughout the code are found in SMC 21.04.040.
B. Street Designation.
1. Primary Street, Side Street, and Alley Designations.
a. All streets abutting a lot must be designated as either a primary street, side street, or alley.
b. When a lot abuts only one street, the street is considered a primary street.
c. A lot abutting multiple streets must designate at least one as a primary street but may abut more than one primary street.
d. For lots that abut multiple streets, the Director will determine the primary street using the following criteria, which are listed from most important to least important:
i. The street or streets with the highest classification according to the Street Typology Map (SMC 21.02.030.G);
ii. The established orientation of the block;
iii. The street abutting the longest face of the block; and
e. Any street not designated as a primary street is designated as a side street. (Ord. O2024-578 § 2 (Att. A))