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Silverton City Zoning Code

ARTICLE 2

LAND USE ZONING DISTRICTS

§ 2.1.100 Classification of land use districts.

Every parcel, lot, and tract of land within the city of Silverton is designated with a land use (zoning) district. The use of land is limited to the uses allowed by the applicable comprehensive plan designation, land use designation and zoning district and/or overlay zone. The applicable districts and overlay zone(s) are determined based on the city of Silverton zoning map and the provisions of this chapter, which shall be consistent with the city of Silverton comprehensive plan, as indicated in Table 2.1.100.
Table 2.1.100
Comprehensive Plan Designation
Applicable Land Use District(s)
Residential – Single-Family
Acreage Residential (AR)
Single-Family Residential (R-1)
Low Density Residential (R-5)
Residential – Multiple-Family
Multiple-Family Residential (RM-10)
Multiple-Family Residential (RM-20)
Commercial
Downtown Commercial (DC)
Downtown Commercial Fringe (DCF)
General Commercial (GC)
Industrial
Industrial Park (IP)
Light Industrial (LI)
Industrial (I)
Overlay Zones
Floodplain (/FP) Overlay
Hillside Protection (/H) Overlay
Public Use (/P) Overlay
Wetlands and Riparian (/WR) Overlay
(Ord. 08-06 § 3, 2008)

§ 2.1.200 Land use district map.

A. 
Consistency with Zoning Map. The boundaries of the land use districts contained within this chapter shall coincide with the boundaries identified on the city’s official zoning map, retained by the city recorder. Said map by this reference is made a part of this development code. The official zoning map, and any map amendments, shall be maintained by the city.
B. 
Applicability. Each lot, tract, and parcel of land or portion thereof within the land use district boundaries designated on the official zoning map is classified, zoned and limited to the uses hereinafter specified and defined for the applicable land use district.
(Ord. 08-06 § 3, 2008)

§ 2.1.300 Determination of land use district boundaries.

When amending land use district boundaries, the city’s comprehensive plan map is the primary source for determining appropriate boundaries. Where the plan map does not provide sufficient detail or direction, district locations and boundaries shall be guided by the purpose and applicability statements at the beginning of each land use chapter (Chapters 2.2 through 2.8). Where, due to the scale, lack of scale, lack of detail or illegibility of the city zoning map, or due to any other reason, there is uncertainty, contradiction or conflict as to the existing or intended location of a district boundary line, the boundary line shall be determined by the planning official in accordance with all of the following criteria:
A. 
Rights-of-Way. Boundaries indicated as approximately following the center lines of streets, highways, railroad tracks, alleys, irrigation canals, bridges, or other rights-of-way shall be construed to follow such center lines. Whenever any public right-of-way is lawfully vacated, the lands formerly within the vacated right-of-way shall automatically be subject to the same land use district designation that is applicable to lands abutting the vacated areas. In cases where the right-of-way formerly served as a land use district boundary, the lands within the right-of-way now vacated shall be allocated proportionately among the subject land use districts;
B. 
Parcel, Lot, Tract. Boundaries indicated as approximately following the boundaries of a parcel, lot, or tract shall be construed as following such boundaries;
C. 
Jurisdiction Boundary. Boundaries indicated as approximately following a city or county boundary, or the urban growth boundary, shall be construed as following said boundary; and
D. 
Natural Features. Boundaries indicated as approximately following a river, stream, drainage channel, drainage basin, topographic contour or other changeable natural feature not corresponding to any feature listed in subsection (A) through (C) of this section shall be construed as following such feature, except that the location may be corrected administratively through a Type II (code interpretation) procedure under Chapter 4.8 SDC.
(Ord. 08-06 § 3, 2008)

§ 2.2.100 Residential districts – Purpose and applicability.

A. 
Purpose. The residential districts promote the livability, stability and improvement of the city’s neighborhoods. The districts are intended to:
1. 
Promote the orderly development of neighborhoods.
2. 
Make efficient use of land and public services and implement the comprehensive plan.
3. 
Designate land for the range of housing types and densities needed by the community, including owner-occupied and rental housing.
4. 
Allow for convenient neighborhood access to parks, schools, places of worship, and other supportive services, compatible with planned residential densities.
5. 
Provide flexible lot standards that encourage compatibility between land uses, efficiency in site design, and environmental compatibility.
6. 
Provide for compatible building and site design at an appropriate neighborhood scale; provide standards that are in character with the landforms and desired architectural character of Silverton.
7. 
Apply the minimum amount of regulation necessary to ensure compatibility with existing residences, schools, parks, transportation facilities, and neighborhood services.
8. 
Reduce reliance on the automobile for neighborhood travel and provide options for walking, bicycling and transit use.
9. 
Provide direct and convenient access to schools, parks and neighborhood services.
10. 
Accommodate acreage residential uses in areas not yet served with urban infrastructure.
B. 
Applicability. The land use districts shall be applied consistently with the policies and land use designations of the city of Silverton comprehensive plan text and map. Where the comprehensive plan allows for the possible application of more than one land use district (i.e., at the time of annexation or any proposed rezoning), the districts shall be applied appropriately based on the following criteria and consistent with the amendment procedures in Chapter 4.7 SDC. Densities may be transferred or adjusted through the planned development approval process under Chapter 4.5 SDC, provided the overall density on the site conforms with the density range allowed per the comprehensive plan designation. The purpose of this is to provide for exceptional development designs that conserve open spaces and meet other community planning objectives.
1. 
The single-family residential (R-1) zone is one of the land use districts that implements the single-family residential comprehensive plan land use designation. It is intended primarily for household and group living at densities generally ranging from two dwellings per acre to not more than six dwellings per acre. Hillside properties zoned R-1 shall also be subject to the hillside protection overlay zone provisions under Chapter 2.6 SDC.
2. 
The low density residential (R-5) zone is one of the land use districts that implements the single-family residential comprehensive plan land use designation. It is intended to accommodate a variety of household and group living uses, including attached and detached dwellings, on small and medium-size lots, at densities generally ranging from five dwellings per acre to not more than 10 dwellings per acre. The R-5 district is an appropriate transition between R-1 zoning and higher density residential or commercial districts.
3. 
The multiple-family residential (RM-10) zone is one of the districts that implements the multifamily comprehensive plan land use designation. It is intended to accommodate a variety of household and group living uses, including multiple-family, attached single-family and small-lot detached dwellings, at densities generally ranging from 10 dwellings per acre to not more than 20 dwellings per acre. The RM-10 district is an appropriate transition between R zoning and higher density residential or commercial districts.
4. 
The multiple-family residential (RM-20) zone is one of the zones that is intended to accommodate household and group living uses, including multifamily and attached single-family dwellings, at densities generally ranging from 20 dwellings per acre to not more than 32 dwellings per acre. The RM-20 district provides for a variety of higher density residential living options.
5. 
The acreage residential (AR) zone is intended to provide appropriate regulations governing the division and development of lands designated acreage residential in the comprehensive plan. These are properties which prior to being annexed to the city may have been developed consistent with Marion County’s rural regulations. The district allows the continued use of existing rural residential developments provided they do not exceed the environmental and public service capabilities of the area. It also recognizes that properties designated AR are in transition from rural to urban uses. Certain uses, such as farming, that may not be permitted on other lands within the city limits may otherwise be allowed on AR lands. It is not intended to be an alternative zoning designation for lands that are already designated to accommodate future urban development at higher densities.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 2, 2021)

§ 2.2.110 Residential districts – Allowed land uses.

Table 2.2.110.A identifies the land uses that are allowed in the residential districts. The specific land use categories are described and examples of uses are provided in Chapter 1.6 SDC. Land uses may not be modified through a planned development, except as provided in Chapter 4.5 SDC. Table 2.2.110.B specifies the land uses allowed in the acreage residential district.
Table 2.2.110.A – Land Uses Allowed in Residential Districts (R-1, R-5, RM-10, RM-20)
Uses
Status of Use in District
Use Categories
(Examples of uses are in Chapter 1.6 SDC; definitions are in Chapter 1.5 SDC.)
Single-Family Residential (R-1)
Low Density Residential (R-5)
Multiple-Family Residential (RM-10)
Multiple-Family Residential (RM-20)
Residential Categories
 
 
 
 
Household Living
 
 
 
 
Single-family detached (does not include cottage cluster developments)
P
P
P
P
Accessory dwelling, per SDC § 2.2.200
S
S
S
S
Duplex (2 dwellings on 1 lot)
P
P
P
P
- More than 1 duplex (4+ units) consecutively attached, per SDC § 2.2.200
N
DR
DR
DR
Single-family attached (2 or more common-wall single-family dwellings), each on its own lot, per SDC § 2.2.200
N
S
S
S
Cottage cluster (2 – 4 single-family dwellings on 1 lot), per SDC § 2.2.200
N
DR
DR
DR
Manufactured home on individual lot, per SDC § 2.2.200, except manufactured home subdivisions
S
S
S
S
Manufactured home park, per SDC § 2.2.200
 
 
 
 
- Lawfully existing as of November 5, 2008
N/A
N/A
N/A
N/A
- New manufactured home park
N
DR
DR
N
Multifamily (3 or more dwellings on lot), per SDC § 2.2.200
N
DR
DR
DR
Shipping container or converted vehicles
N
N
N
N
Group Living
 
 
 
 
Group living (dormitories, sororities, fraternities)
N
N
CU
CU
Group care home, per SDC § 2.2.200
P
P
P
P
Group care facility, per SDC § 2.2.200
N
N
DR
DR
Group care institution, per SDC § 2.2.200
N
N
DR
DR
Commercial Categories
 
 
 
 
Bed and breakfast inn
CU+S
CU+S
CU+S
CU+S
Home occupation, per the standards in SDC § 2.2.200
S
S
S
S
Kennel
N
N
N
N
Industrial Categories
N
N
N
N
Institutional Categories
 
 
 
 
Basic utilities
P
P
P
P
Jails and detention facilities
N
N
N
N
Renewable energy facilities
- Accessory use
CU+S
CU+S
CU+S
CU+S
- Primary use
N
N
N
N
Nonrenewable energy facilities
N
N
N
N
Telecommunication facilities and towers
N
N
N
N
Daycare, adult or child
- Family daycare (16 or fewer children); subject to state licensing, ORS Chapter 657A
P
P
P
P
- Nonfamily daycare
CU
CU
CU
CU
Parks and open space
- Outdoor uses, including parking
P
P
P
P
- Lighted sports fields and/or buildings exceeding 2,000 square feet
CU
CU
CU
CU
Religious institutions and houses of worship
- Facilities lawfully established as of November 5, 2008
P
P
P
P
- New facilities
CU
CU
CU
CU
- Transitional shelter communities, per the standards in SDC § 2.2.200(N)
CU
CU
CU
CU
Jails and Detention Facilities
N
N
N
N
Schools
- 20 or fewer students
P
P
P
P
- More than 20 students
CU
CU
CU
CU
Other Categories
 
 
 
 
Accessory structures (with a primary use)
- No taller than 22 ft. and no larger than 800 square feet of building footprint
S
S
S
S
- Taller than 22 ft. or larger than 800 square feet of building footprint, not to exceed primary structure’s floor area
CU
CU
CU
CU
Membrane carports/canopies are not allowed within any required setback
 
 
 
 
Farm use, keeping of livestock, except roosters and swine, if greater than 1 acre
P
N
N
N
Farm use, chickens
S
N
N
N
Farm use, sale of produce raised on premises
P
N
N
N
Agriculture – Nurseries and similar horticulture (indoor or outdoor)
P
P
P
P
Agriculture – Marijuana producers and grow sites, enclosed and nonenclosed
N
N
N
N
Radio frequency transmission facilities and telecommunication towers, excluding amateur radio antennas, when accessory to a permitted use, provided they do not exceed the permitted structure height
N
N
N
N
Nano radio frequency transmission facilities, per SDC § 2.2.200(O)
S
S
S
S
Temporary uses (limited to “P” and “CU” uses), per SDC § 4.9.100
P/CU
P/CU
P/CU
P/CU
Key:
P = Permitted, subject to land use review
S = Permitted with standards (SDC § 2.2.200), except standards may be modified with a planned development overlay
DR = Design review required (Chapter 4.2 SDC)
CU = Conditional use required (Chapter 4.4 SDC)
N = Not permitted
Table 2.2.110.B – Land Uses Allowed in Acreage Residential District (AR)
Uses
Status of Use
Use Categories
(Examples of uses are in Chapter 1.6 SDC; definitions are in Chapter 1.5 SDC.)
Residential Categories
 
Household Living
 
Single-family detached (does not include cottage cluster developments)
P
Accessory dwelling, per SDC § 2.2.200
P
Duplex (2 dwellings on 1 lot)
N
Single-family attached (2 or more common-wall single-family dwellings), each on its own lot, per SDC § 2.2.200
N
Cottage cluster (2 – 4 single-family dwellings on 1 lot), per SDC § 2.2.200
N
Manufactured home on individual lot, per SDC § 2.2.200, except manufactured home subdivisions
S
Manufactured home park, per SDC § 2.2.200
N
Multifamily (3 or more dwellings on lot), except as provided for cottage housing
N
Group Living
 
Group care home, per SDC § 2.2.200
P
Group care facility or institution, per SDC § 2.2.200
N
Commercial Categories
 
Bed and breakfast inn
CU+S
Commercial use in conjunction with a farm use, involving primarily sales of produce or goods not produced on the premises
CU
Home occupation, per the standards in SDC § 2.2.200
P
Kennels
CU
Other commercial uses not similar to those listed above
N
Industrial Categories
N
Institutional Categories
 
Basic utilities
P
Renewable energy facilities
- Accessory Use
CU+S
- Primary Use
N
Nonrenewable energy facilities
N
Telecommunication facilities and towers
N
Community services
P
Daycare, adult or child
- Family daycare (16 or fewer children); subject to state licensing, ORS Chapter 657A
P
- Nonfamily daycare
N
Parks and open space
- Outdoor uses, including parking
P
- Lighted sports fields and/or buildings exceeding 2,000 square feet
CU
Religious institutions and houses of worship
- Facilities lawfully established as of November 5, 2008
P
- New facilities, not exceeding 20,000 square feet in total floor area
CU
Jails and detention facilities
N
Schools
- 20 or fewer students
P
- More than 20 students
CU
Other Categories
 
Accessory structures (with a primary use)
- Meeting required setbacks and height regulations with a building footprint not to exceed the primary structure’s footprint
Membrane carports/canopies are not allowed within any required setback
P
Farm use, including livestock and the sale of produce that is raised on the premises; riding academies and public stables
P
Agriculture – Nurseries and similar horticulture (indoor or outdoor), except gardening that is allowed as ancillary to a permitted residential use
P
Agriculture – Marijuana producers and grow sites, enclosed and nonenclosed
N
Mining and/or excavation that is not accessory to a permitted use with applicable land use approval
N
Radio frequency transmission facilities and telecommunication towers, excluding amateur radio antennas, when accessory to a permitted use, provided they do not exceed the permitted structure height
N
Temporary uses (limited to “P” and “CU” uses), per SDC § 4.9.100
P/CU
Transportation facilities (operation, maintenance, preservation, and construction per TSP)
P
Key:
P = Permitted, subject to land use review
S = Permitted with standards (SDC § 2.2.200), except standards may be modified with a planned development overlay
DR = Design review required (Chapter 4.2 SDC)
CU = Conditional use required (Chapter 4.4 SDC)
N = Not permitted
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 16-01 § 3, 2016; Ord. 18-22 § 2, 2018; Ord. 19-05 § 1, 2019; Ord. 21-04 §§ 3, 4, 2021)

§ 2.2.120 Residential districts – Development standards.

The development standards in Table 2.2.120.A apply to all uses, structures, buildings, and development, and major remodels, in the residential districts. Table 2.2.120.B specifies development standards for the acreage residential district. The standards may be modified with approval of a planned development.
Table 2.2.120.A – Development Standards for Residential Districts
Standard
R-1
R-5
RM-10
RM-20
Density* (DU/acre) – Min. and Max.
2 – 6 DU/acre, subject to dev. standards
5 – 10 DU/acre, subject to dev. standards
10 – 20 DU/acre, subject to dev. standards
20 – 32 DU/acre, subject to dev. standards
*See also SDC § 2.2.150, Residential districts – Housing density.
Minimum Lot Area* (square feet)
Single-family detached or duplex, where vehicle access provided from street
7,000 sq. ft. interior
8,000 sq. ft. corner
5,000 sq. ft.
4,000 sq. ft.
4,000 sq. ft.
Single-family detached or duplex, where vehicle access provided from alley
6,000 sq. ft. interior
7,000 sq. ft. corner
4,000 sq. ft.
3,000 sq. ft.
3,000 sq. ft.
Single-family, attached, where vehicle access provided from street
Not permitted
5,000 sq. ft.
4,000 sq. ft.
4,000 sq. ft.
Single-family, attached, where vehicle access provided from alley
Not permitted
4,000 sq. ft.
2,200 sq. ft.
1,600 sq. ft.
Multiple-family or cottage cluster
Not permitted
2,000 sq. ft. per dwelling unit
2,000 sq. ft. per dwelling unit
1,200 sq. ft. per dwelling unit
Nonresidential uses, except tracts for open space and utilities
7,000 sq. ft.
5,000 sq. ft.
4,000 sq. ft.
4,000 sq. ft.
*Lot area is subject to min. and max. density. Sizes may be reduced by 10 percent through lot size averaging, per SDC § 4.3.115, land divisions, or SDC § 4.5.130, Planned development. Does not apply to open space and parks.
Minimum Lot Width*
Where vehicle access to be provided from street or flag lot
50 ft.
50 ft.
40 ft.
40 ft.
Where vehicle access to be provided from alley
50 ft.
40 ft.
20 ft.
16 ft.
*Width is measured at the front setback line. For flag lots, width is measured at the front setback line on the “flag” portion of the lot. The minimum width on the “pole” portion of such lots is 20 feet. See also SDC § 4.3.115, Flexible lot size – Lots without street frontage – Flag lots – Minisubdivisions. All applicable setbacks, lot area, coverage and other standards must be met.
Minimum Lot Depth
60 ft.
60 ft.
60 ft.
60 ft.
Maximum Building Stories
2.5
2.5
3.0
3.0
Building/Structure Height
See also: SDC § 2.2.130, Residential districts – Setback yards – Exceptions, reverse frontage lots and flag lots; SDC § 2.2.200(A), Accessory Dwellings (Attached, Interior, Separate Cottage, or Above Detached Garage); SDC § 3.1.200(N), Vision Clearance; SDC § 3.2.500, Fences and walls.
Standard maximum height
35 ft.
35 ft.
35 ft.
35 ft.
Accessory structure and accessory dwelling height
22 ft.
22 ft.
22 ft.
22 ft.
Interior lot: fences, hedges, retaining/garden walls*
Max. height – Front yard
42 inches
42 inches
42 inches
42 inches
Max. height – Interior side
6 ft.
6 ft.
6 ft.
6 ft.
Max. height – Rear yard
6 ft.
6 ft.
6 ft.
6 ft.
Max. height – Reverse frontage lot (rear)
42 inches, or 6 ft. with 5 ft. landscape buffer between fence/wall and sidewalk
42 inches, or 6 ft. with 5 ft. landscape buffer between fence/wall and sidewalk
42 inches, or 6 ft. with 5 ft. landscape buffer between fence/wall and sidewalk
42 inches, or 6 ft. with 5 ft. landscape buffer between fence/wall and sidewalk
Corner lot: fences, retaining/garden walls
Max. height – Front yard within 50 ft. of through-curb intersection
42 inches
*see Figure 3.2.500
42 inches
*see Figure 3.2.500
42 inches
*see Figure 3.2.500
42 inches
*see Figure 3.2.500
Max. height – Front yard outside 50 ft. of through-curb intersection, at least 5 ft. from property line
6 ft.
6 ft.
6 ft.
6 ft.
Max. height – Side yard
6 ft.
6 ft.
6 ft.
6 ft.
Max. height – Rear yard
6 ft.
6 ft.
6 ft.
6 ft.
Alley
6 ft.
6 ft.
6 ft.
6 ft.
*Retaining walls taller than 4 feet and fences taller than 6 feet require a building permit.
1. Basic lot coverage standards
Lot coverage by buildings and structures exceeding 30 inches above grade (foundation plane divided by lot area)
50%
50%
65%
75%
2. Lot coverage bonus
Allowable lot coverage may increase when driveways, rooftops, and/or parking surfaces are designed with approved green building methods such as vegetated swales, stormwater planter boxes, rooftop gardens, or porous paving materials approved through design review. Lot coverage may increase by a ratio of one-half (0.5) square foot for every one square foot of city-approved green building area.
Minimum landscape area (percent site area), as required under Chapter 3.2 SDC Additional usable open space area may be required for multifamily projects, per SDC § 2.2.200.
All areas not covered by structures and pavement; not less than 10 percent of site
All areas not covered by structures and pavement; not less than 12 percent of site
All areas not covered by structures and pavement; not less than 10 percent of site
All areas not covered by structures and pavement; not less than 8 percent of site
Minimum Setbacks (feet):
See also: SDC § 2.2.130, Residential districts – Setback yards – Exceptions, reverse frontage lots and flag lots; SDC § 3.1.200(N), Vision Clearance; and SDC § 3.2.500, Fences and walls.
Front/Street Setback
Primary structure
15 ft.
Garages and carport entries
20 ft.
Accessory structure and accessory dwelling
20 ft.
Front porch, balcony, portico, patio/garden wall and similar architectural elements that are less than 50 percent enclosed
12 ft. from right-of-way line, provided the structure does not conflict with vision clearance at intersections, utilities or easements
Note: Other standards may preclude building at a minimum setback. Be sure to avoid utilities, easements, and clear vision areas. See also special setback for planned street improvements under Chapter 3.4 SDC.
Side Setbacks
One-story structures
5 ft.
Two-story structures
7 ft.
Three-story structures
9 ft.
Accessory structure and accessory dwelling
5 ft.
Exceptions:
Alley minimum setback
5 ft.
Common walls when allowed
0 ft.
Rear Setbacks
One-story structure
20 ft.
Two-story structures
20 ft.
Three-story structures
20 ft.
Accessory structures and accessory dwellings
5 ft.
Porches, decks and similar structures
May encroach into rear yard setback 10 ft.
Exceptions:
Alley minimum setback
5 ft.
Common walls when allowed
0 ft.
Special setback for planned street improvements in residential districts
The city may require a minimum setback of up to 50 feet measured from the street center line to any structure, when a structure abuts a street containing less than the standard right-of-way for the subject street classification. Street classification and required right-of-way width are as indicated by the city of Silverton transportation system plan.
Special setbacks for accessory structures less than 200 square feet on corner lots
10 feet from street property lines and five feet from rear property lines, at least 50 feet from through curb intersection, outside of any vision clearance area.
Note: Other standards may preclude building at a minimum setback. Be sure to avoid utilities, easements, and clear vision areas. See also special setback for planned street improvements under Chapter 3.4 SDC.
Table 2.2.120.B – Development Standards for Acreage Residential Districts
Standard
AR
Density (DU/acre) – Maximum
No new lots will be allowed to be created through the subdivision or partition process until such time as sanitary sewer is provided to serve the proposed lot, and it can be shown that a need for additional residential lots cannot be met by additional lands elsewhere inside the urban growth boundary.
Minimum Lot Area (square feet)
N/A
Maximum Building/Structure Height
 
- Dwellings
35 ft.
- Farm-related structures on farm parcels
None
- Other structures
35 ft., except as otherwise approved with a conditional use
Minimum Setbacks for New Single-Family Dwellings
 
- Rear yard
50 ft.
- Side yard
25 ft.
- Front yard
50 ft.
Minimum Setbacks for Accessory Structures and Other Nonresidential Structures
 
- Rear yard
10 ft.
- Side yard
10 ft.
- Front yard
20 ft.
Exemptions
 
Properties which are designated AR shall be exempt from the following city regulations due to the rural character and uses allowed in the AR district
SMC § 13.16.190, Privies, cesspools and septic tank prohibitions;
SMC § 8.04.050, Barbed wire and electric fence prohibitions;
SMC § 8.04.050, Hazardous containers and conditions;
SMC § 8.04.050, Attractive nuisances;
SMC § 8.04.050, Noxious vegetation;
SMC § 8.04.055, Noise disturbances;
SMC § 9.16.010, Discharging guns or other weapons prohibition.
*Except that the owner shall be responsible for complying with all applicable county, state and federal rules and regulations pertaining to the above topics.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 16-04 § 2, 2016; Ord. 21-04 § 5, 2021)

§ 2.2.130 Residential districts – Setback yards – Exceptions, reverse frontage lots and flag lots.

A. 
Residential Yard Setbacks – Purpose. Residential setback yards provide space for private yards and building separation for fire protection/security, building maintenance, sunlight and air circulation. The setback yard standards contained in Table 2.2.120 are also intended to promote human-scale design and traffic calming by diminishing the visual presence of garages along the street and encouraging the use of pedestrian amenities, such as extra-wide sidewalks and street furnishings in multiple-family developments and in residential-commercial projects. The standards also encourage the orientation of buildings to provide street visibility for public safety and neighborhood security.
B. 
Setback Yards – Exceptions. Eaves, chimneys, bay windows, overhangs, and similar architectural features may encroach into a side yard setback by not more than 36 inches; provided, that a setback of not less than 36 inches is preserved, all applicable building and fire codes are met, and the clear vision standards in SDC § 3.1.200 are met. Porches, decks and similar structures not exceeding 30 inches in height are not subject to setback provisions. Porches, decks and similar structures exceeding 30 inches in height may encroach into the rear setback no more than 10 feet and may encroach into the front yard as provided in Table 2.2.120. Walls and fences built on property lines are subject to the height standards in Table 2.2.120 and the provisions of SDC § 3.1.200(N), Vision Clearance, and 3.2.500, Fences and walls.
C. 
Setback Yards – Reverse Frontage Lots. Buildings on reverse-frontage lots (through lots) shall be required to meet the street yard setback on both streets; a rear yard setback is not required. Reverse frontage lots are subject to the fence height and setback requirements in SDC § 2.2.120 and the landscape buffer requirements in SDC § 3.2.300.
D. 
Setback Yards – Flag Lots. Where flag lots are allowed, the front yard of the flag lot shall conform to one of the following, as designated by the approval body:
Option 1. Adjacent to the street from which access is taken, or
Option 2. Adjacent to the flag pole from which access is taken.
The applicant for a building permit may request either Option 1 or Option 2, except as otherwise prescribed by conditions of a partition or subdivision approval, and provided adequate setbacks and privacy screening or fencing are provided. The city may impose such conditions of approval as provided under SDC § 4.3.115.
(Ord. 08-06 § 3, 2008)

§ 2.2.140 (Reserved)

(Ord. 08-06 § 3, 2008)

§ 2.2.150 Residential districts – Housing density.

A. 
Residential Density Standard. To ensure efficient use of buildable lands and to provide for a range of needed housing in conformance with the comprehensive plan, all new developments in the residential districts shall conform to the minimum and maximum densities prescribed in Tables 2.2.120.A and 2.2.120.B, except as provided in subsections (A)(1) through (3) of this section:
1. 
Residential care homes/facilities/institutions, senior housing, including assisted living, accessory dwellings, and developments in areas with significant natural resources or physical constraints (e.g., wetlands, unstable soils, steep slopes, etc.) are exempt from the minimum density standard.
2. 
The density standards may be averaged over more than one development phase when approved through a planned development.
3. 
Accessory dwellings are exempt from the density standards. Duplexes shall be counted as one dwelling unit for the purpose of determining compliance with maximum density standards. Duplexes may be counted as one or two dwelling units for the purpose of determining compliance with minimum density standards.
4. 
Partitions and construction of single-family homes on lots exceeding 20,000 square feet, except within the hillside protection overlay district, shall be planned so that infill development can occur in the future and such development can occur in accordance with other adopted plans (e.g., the city of Silverton transportation system plan) and the minimum lot size and other dimensional standards of the district. See also SDC § 4.3.110(C), Future Redivision Plan. Densities may be transferred or adjusted through the planned development approval process under Chapter 4.5 SDC, to provide for exceptional development designs that conserve open spaces and meet other community planning objectives.
B. 
Residential Density Calculation.
1. 
Minimum and maximum housing densities are calculated by multiplying the total parcel or lot area by the applicable density range. Properties must be developed within the minimum and maximum range. Some properties may not be capable of accommodating development at maximum densities. Properties that cannot meet maximum density standards may consider transferring density and modifying allowable lot sizes and/or housing types through a planned development process. Typical constraints include street right-of-way requirements, parcel configuration, or the presence of natural features or physical constraints.
2. 
Areas reserved for flag lot access (flag poles) are not counted for the purpose of calculating minimum lot area.
3. 
Duplexes shall be counted as one dwelling unit for the purpose of determining compliance with maximum density standards. Duplexes may be counted as one or two dwelling units for the purpose of determining compliance with minimum density standards.
4. 
Housing density calculations resulting in fractions of dwelling units shall be rounded to the nearest whole number.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 6, 2021)

§ 2.2.160 Residential districts – Lot coverage and impervious surfaces.

A. 
Lot Coverage. The maximum allowable lot coverage shall be as provided in Table 2.2.120. Lot coverage by buildings is calculated as the percentage of a lot or parcel covered by buildings and structures exceeding 30 inches above grade, including enclosed and unenclosed structures (as defined by the foundation plane).
B. 
Impervious Surfaces. Impervious surface shall not exceed 50 percent of the required setback yards. Impervious surfaces are calculated as the percentage of a lot or parcel covered by building foundations, patios, decking, asphalt, concrete, gravel, and similar surfaces, except where such surfaces allow stormwater infiltration and are approved by the city for such purpose. Impervious area does not include planted areas, porous non-plant ground covers (e.g., mulch) and landscaped areas under eaves.
(Ord. 08-06 § 3, 2008)

§ 2.2.170 Residential districts – Building height, measurement and exceptions.

Building heights shall conform to the standards in Table 2.2.120, and subsections (A) through (C) of this section:
A. 
Building Height Measurement. The vertical distance from the grade plane to the average height of a pitched (gable or hip) roof, or the top of a mansard or flat roof including the parapet walls.
B. 
Exclusions from Maximum Building Height Standards. Rooftop structures, including towers, spires, steeples and other structures when built according to Section 1509 of the International Building Code, may extend 20 feet past the roof height requirement when approved by the planning commission and fire department.
C. 
Sloped Lots (Hillside Overlay District). The maximum allowable height on a sloping lot (12 percent or greater slope averaged from front to rear property line) shall be 35 feet and three stories.
(Ord. 08-06 § 3, 2008; Ord. 16-04 § 3, 2016)

§ 2.2.180 Residential districts – Building orientation.

A. 
Purpose. The following standards are intended to orient buildings close to streets to promote pedestrian-oriented development where walking is encouraged. Placing residences and other buildings close to the street also encourages neighborhood crime prevention, natural surveillance or security, and safety by having more “eyes on the street.”
B. 
Applicability. This section applies to all new primary structures.
C. 
Building Orientation Standards. All primary structures shall conform to the following:
1. 
Except as provided below, all primary structures shall have at least one primary entrance (i.e., dwelling entrance, lobby entrance, or breezeway/courtyard entrance serving a cluster of dwellings) facing an adjacent street, or if on a side elevation, not more than 30 feet from a street sidewalk. See Figure 2.2.180.C(1);
Figure 2.2.180.C(1) – Residential District Building Orientation
Acceptable
Not Acceptable
2. 
Except as allowed for single-family detached dwellings and duplexes, or as provided below, off-street parking, driveways, and other vehicle areas shall not be placed between buildings and the street(s) to which they are oriented, as per subsection (C)(1) of this section and Figure 2.2.180.C(1). Off-street parking and driveways may be placed between buildings and streets where the approval body finds that one of the following exemptions in subsections (C)(2)(a) through (e) of this section applies and allowing the exemption will not adversely affect pedestrian access, safety or convenience:
a. 
Schools, group care facilities, and public uses may have one drive aisle with parking, including ADA accessible spaces, located between the street and the primary building entrance; provided, that the building’s primary entrance is connected to an adjacent street by a pedestrian walkway; in such case, the driveway/parking area shall contain a clearly defined pedestrian cross-walk as specified in SDC § 3.1.300. The intent of this exception is to allow limited use of driveways for drop-off or loading zones where the functional requirements of the use require such facilities.
b. 
Attached single-family housing developments (townhomes) with street-facing garages may have not more than one driveway access located between the street and the primary building entrance for every two dwelling units, provided the access meets the following criteria, as generally shown in Figure 2.2.180.C(2):
i. 
The maximum number of consecutively attached townhomes with garages facing the same street is six (three driveways);
ii. 
Where two abutting townhomes have street-facing garages, they shall share one driveway access that does not exceed 24 feet in width where it crosses the sidewalk and intersects the street. The intent of this standard is to minimize sidewalk interruptions and maximize the space available for on-street parking;
iii. 
The townhomes’ primary entrances shall be connected to an adjacent sidewalk via pedestrian walkway of not less than three feet in width; such walkway may adjoin the driveway described in subsection (C)(2)(b)(i) of this section to minimize paving;
iv. 
Street-facing garages shall be set back at least 20 feet from the street property line; where a building is placed less than 20 feet from the street property line, the 20-foot garage setback may be accomplished by recessing the garage behind the front building elevation.
Figure 2.2.180.C(2) – Townhome Building Orientation
c. 
Parking may be placed between a building and an adjacent street where the street is a designated arterial street under the Silverton transportation system plan, and the approval body finds that such orientation provides greater pedestrian accessibility, comfort and/or safety than would otherwise be provided.
d. 
Where a development contains multiple buildings and there is insufficient street front-age to which buildings can be oriented, a primary entrance may be oriented to common green, open space, plaza, or courtyard. When oriented in this way, the primary entrance(s) and green, plaza, or courtyard shall be connected to the street by a pedestrian walkway meeting the standards in SDC § 3.1.300. See also Figure 2.2.180.C(1).
e. 
Where live-work or other commercial uses are allowed, any off-street parking shall be located behind or to the side of such building(s) and screened from abutting properties in accordance with Chapter 3.2 SDC (See Figure 2.2.180.C(3)). Off-street parking shall not be located between any building and any street.
Figure 2.2.180.C(3) – Commercial Orientation in a Residential District
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 7, 2021)

§ 2.2.190 Residential districts – Architectural design standards.

A. 
Purpose. The purpose of this section is to promote the public health, safety, and welfare by requiring at least a minimum level of design on every building and varied building elevations in large developments. The design standards are also intended to promote architectural compatibility and harmony within Silverton’s existing residential neighborhoods as infill development occurs. The standards support context-appropriate, pedestrian-scale design and crime prevention by providing street visibility from residential structures, while affording flexibility to use a variety of building styles.
B. 
Applicability. This section applies to all new primary residential structures and accessory dwellings. It does not apply to remodels of, or additions to, existing single-family dwellings including conversion of an existing single-family dwelling into a duplex, existing accessory dwellings, existing duplexes, or designated historic structures. The standards and criteria in this section are applied through the land use review or design review procedure (Chapter 4.2 SDC), as applicable, prior to building permit review. The provisions under subsection (C) of this section may be adjusted through the design performance option in SDC § 4.2.510.
C. 
Standards. All projects that are subject to this section shall meet all of the standards in subsections (C)(1) through (5) of this section, except as modified through SDC § 4.2.510, Design performance option. The graphics provided with each standard are intended to show examples of how the standards can be met and should not be interpreted as requiring a specific architectural feature or style. Other building styles and designs can be used to meet the standards when the approval body finds they are consistent with the text. An architectural feature, as shown below, may be used to comply with more than one standard.
1. 
Building Length. The continuous horizontal distance, as measured from end-wall to end-wall, of individual buildings shall not exceed 88 feet in the R-1, R-5, and RM-10 districts and 120 feet in the RM-20 district.
2. 
Articulation. All buildings shall incorporate design features such as varying roof lines, off-sets, balconies, projections (e.g., overhangs, porches, or similar features), recessed or covered entrances, window reveals, change in materials or textures (e.g., stone or faux stone, brick, wood or concrete-wood (shakes versus lap or board and batten siding, etc.)), or similar elements to break up large expanses of uninterrupted building surfaces or blank walls. Along the horizontal and vertical face of a structure, and on all building stories, such elements shall occur at least once every 20 feet, and each floor shall contain at least two elements, as generally shown in the figures in this section.
a. 
Recess (e.g., deck, patio, courtyard, entrance or similar feature) with a minimum depth of four feet;
b. 
Extension (e.g., floor area, deck, patio, entrance, overhang, or similar feature) projecting a minimum of two feet and running horizontally for a minimum length of four feet;
c. 
Offsets or breaks in roof elevation of two feet or greater in height; and/or
d. 
Change in materials, where one material is the predominant material on all elevations (e.g., where wood lap siding is the predominant material, brick, stone or faux stone could be selected for wainscoting or column accents; and wood or wood-appearance shingles could be used as accents on gable ends, etc.).
Figure 2.2.190.C(4) – Building Length and Articulation (Multifamily Housing Example)
3. 
Eyes on the Street. All building elevations visible from a street right-of-way shall provide prominent defined entrances, and a combination of windows, doors, porches, balconies, and terraces. A minimum of 40 percent of front (i.e., street-facing) elevations, and a minimum of 30 percent of side and rear building elevations, as a percentage of surface area and horizontal plane (lineal feet), shall meet this standard. Windows used to meet this standard shall be proportionately sized and evenly distributed, as generally shown in the figures above. The standard applies to each full and partial building story.
4. 
Garage. An attached or detached garage or carport with capacity for the minimum required parking required by SDC Table 3.3.300.A shall be required for all new single-family homes and duplexes.
5. 
Detailing and Design Variety. All buildings shall provide detailed design on all street-facing walls (i.e., those oriented 45 degrees or less from street lot line). Detailed design shall be provided by using at least five of the architectural features in subsections (C)(5)(a) through (u) of this section as is appropriate for the proposed building type and style. The applicant may select the desired elements. It is not within the approval body’s authority to prescribe specific elements except when the project is being reviewed as part of a planned development or conditional use request, or it is subject to the design performance option under subsection (C)(5)(v) of this section, only in these cases may the approval body require specific design elements or features, consistent with the purpose in subsection (A) of this section.
a. 
Dormers;
b. 
Gables (roof pitch minimum of 4:12);
c. 
Recessed entries;
d. 
Covered porch entries or portico;
e. 
Cupolas or towers;
f. 
Pillars or posts;
g. 
Eaves (minimum six-inch projection);
h. 
Off-sets in building face or roof (minimum 16 inches);
i. 
Window trim (minimum two inches wide);
j. 
Bay windows;
k. 
Balconies;
l. 
Decorative patterns on exterior finish (e.g., scales/shingles, wainscoting, ornamentation, and similar features);
m. 
Decorative cornice or pediment (e.g., for flat roofs);
n. 
Decorative shingles and molding on gable end;
o. 
Gable end truss;
p. 
Recessed garage;
q. 
Decorative accent (brick, stone, rock, etc.) on front facade;
r. 
Projected entries;
s. 
Window detail (mullions or other);
t. 
Pitched roof, minimum 4:12;
u. 
Shutters;
v. 
An alternative feature providing visual relief, similar to subsections (C)(5)(a) through (u) of this section, as approved through the design performance option under SDC § 4.2.510.
Figure 2.2.190.C(5) – Examples of Architectural Elements (illustrative only)
Example 1
Figure 2.2.190.C(6) – Examples of Architectural Elements (illustrative only)
Example 2
(Ord. 08-06 § 3, 2008; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 21-04 §§ 8, 9, 2021)

§ 2.2.200 Residential districts – Special use standards.

This section provides standards for specific land uses and building types, as identified in Table 2.2.110.A, that control the scale and compatibility of those uses within the residential districts. The standards in this section supplement (are in addition to and do not replace) the standards in SDC §§ 2.2.100 through 2.2.190, and applicable building codes. This section applies to the following uses and building types, as specified in subsections (A) through (K) of this section:
•
Accessory dwellings (subsection (A) of this section);
•
Attached single-family (townhouses) and attached duplexes (subsection (B) of this section);
•
Bed and breakfast inns (subsection (D) of this section);
•
Cottage cluster (subsection (E) of this section);
•
Group living (residential care homes and facilities) (subsection (F) of this section);
•
Home occupations (subsection (G) of this section);
•
Manufactured homes on individual lots (subsection (H) of this section);
•
Manufactured/mobile home parks (subsection (I) of this section);
•
Multiple-family housing (subsection (J) of this section);
•
Renewable energy facilities (subsection (K) of this section).
A. 
Accessory Dwelling (Attached, Interior, Separate Cottage, or Above Detached Garage). Accessory dwellings shall conform to all of the following standards:
1. 
Floor Area. Accessory dwellings shall not exceed 800 square feet of floor area, or 60 percent of the primary unit, whichever is less;
2. 
Exempt from Density. Accessory dwellings are exempt from the housing density standards of the residential districts;
3. 
Structure Types. The structure complies with the applicable state building code, or is a manufactured home meeting the standards of subsections (H)(2), (3), (5), (6), (7) and (8) of this section;
4. 
One Unit. A maximum of one accessory dwelling unit is allowed per detached single-family house, attached house or manufactured home outside of a manufactured home park. A lot may be developed as either a primary dwelling and an accessory dwelling unit, or as a duplex, so long as the total number of dwelling units does not exceed two;
5. 
Development Standards. The dwelling shall conform to the lot standards in Tables 2.2.120.A and 2.2.120.B.
6. 
Design Standards. The dwelling shall conform to the architectural design standards of SDC § 2.2.190.
B. 
Attached Single-Family (Townhouses) and Two or More Duplexes Attached. Attached housing with three or more dwellings, and attached duplex housing (two or more consecutively attached duplexes), shall conform to the standards in subsections (B)(1) through (2) of this section, which are intended to control development scale; avoid or minimize impacts associated with traffic, parking, and design compatibility; and ensure management and maintenance of common areas.
1. 
Alley Access Required for Subdivisions Containing Townhomes or Duplexes. Subdivisions, or blocks within subdivisions, containing more than six consecutively attached single-family dwellings, or four or more attached duplexes (eight-plus dwelling units), shall provide vehicle access to all such lots and units from an alley or parking court, as described in SDC § 3.1.200. Alley(s) and parking court(s) shall be created at the time of subdivision approval, and may be contained in private tracts or, if approved by the city, in public right-of-way, in accordance with SDC § 3.4.100, Transportation standards, and Chapter 4.3 SDC, Land Divisions and Property Line Adjustments.
2. 
Common Areas. Any common areas (e.g., landscaping, private tracts, common driveways, private alleys, building exteriors, and/or similar common areas) shall be owned and maintained by a homeowners’ association or other legal entity. A copy of any applicable covenants, restrictions and conditions shall be recorded and provided to the city prior to building permit approval.
C. 
Repealed by Ord. 21-04.
D. 
Bed and Breakfast Inns. Where bed and breakfast inns are allowed, they shall require approval through conditional use review (Type III) and conform to all of the following standards:
1. 
Accessory Use. The use must be accessory to a household already occupying the structure as a residence.
2. 
Maximum Size. In the R-1 and R-5 zones, four bedrooms for guests, and a maximum of eight guests are permitted per night; in the RM-10, RM-20 and DCF zones, 12 bedrooms are allowed for guests, with a maximum of 24 guests per night.
3. 
Length of Stay. Maximum length of stay is 28 days per guest; anything longer is classified as a hotel or commercial lodging. The bed and breakfast shall maintain a guest registry.
4. 
Employees. Up to two nonresident employees. There is no limit on resident employees.
5. 
Food Service. May be provided only to overnight guests of the business.
6. 
Owner-Occupied. Shall be owner-occupied.
7. 
Signs. Signs shall require a sign permit approved by the city of Silverton, and not exceed a total of four square feet of surface area on all sides.
8. 
Other Permit or Licensing Requirements. The owner of a bed and breakfast use shall be responsible for obtaining and complying with all other applicable permit and/or licensing requirements.
E. 
Cottage Cluster. Where a lot is developed with two or more detached dwellings, the development shall conform to the following standards which are intended to provide light, air, and open space for the occupants:
1. 
Vehicular Access. The furthermost distance from all dwellings to the closest abutting public street shall be no more than 150 feet, or an approved fire apparatus lane may be required to serve the development.
2. 
Central Green. The dwellings shall abut a central open space or green of not less than 400 square feet per dwelling (1,600 square feet for four dwellings). The green shall provide benches and other amenities for residents and have a minimum width of 20 feet, except where additional building separation is required under applicable building codes. A homeowners’ or condominium association shall be responsible for ongoing maintenance of the green and enforcement of any shared parking.
3. 
Parking. Two parking spaces are required for each dwelling, plus one space for each four units. The parking spaces for all dwellings shall be oriented away from the green. Parking may be provided in parking bays, garages or carports, attached or detached from the cottages. When provided in a parking lot, parking spaces shall be screened from abutting properties and walkways shall be provided, as specified under SDC § 3.2.300.
4. 
Design Review. Design review shall be required for new cottage developments, including conversion of existing single-family homes to cottage developments, to ensure conformance with parking, landscaping, architectural review, and other code requirements.
F. 
Group Living (Residential Care Homes, Residential Care Facilities, and Residential Care Institutions). Group living includes a variety of residential living arrangements (see SDC § 1.6.100(A)). Residential care provides lodging, care, treatment, or training for children and/or adults and is licensed by the state of Oregon. Residential care may provide residential care alone, or in conjunction with treatment and/or training, for six or fewer individuals (“homes”) or for seven to 15 individuals (“facilities”), or for 16 or more individuals (“institutions”), who need not be related. Staff persons required to meet state licensing requirements are not counted in the number of facility residents and need not be related to each other or the residents. Residential care homes and facilities consistent with ORS 197.660 through 197.670, and institutions consistent with ORS 443.400 through 443.455, shall comply with the following standards:
1. 
Licensing. All residential care homes, facilities, and institutions shall be duly licensed by the state of Oregon.
2. 
Parking. Parking in accordance with Chapter 3.3 SDC.
3. 
Design Review. Design review shall be required for new structures to be used as residential care facilities or institutions, to ensure compliance with the licensing, parking, and other requirements of this code.
G. 
Home Occupations. The purpose of this section is to encourage those who are engaged in small commercial ventures that could not necessarily be sustained if it were necessary to lease commercial quarters, or which, by the nature of the venture, are appropriate in scale and impact to be operated within a residence. Home occupations are encouraged for their contribution in reducing the number of vehicle trips often generated by conventional businesses:
1. 
Home occupations meeting the standards in subsection (G)(2) of this section are allowed outright, provided the owner has obtained and is in compliance with all applicable permit and licensing requirements, and all other uses and structures on the subject property are in conformance with all applicable city codes and requirements.
2. 
Standards for Home Occupations.
a. 
The use is carried on only by members of the family residing on the premises and not more than one outside employee or volunteer who does not exceed 40 hours per week.
b. 
The home occupation shall be continuously conducted in such a manner as not to create any public or private nuisance, including, but not limited to, offensive noise, vibration, smoke, dust, odors, heat or glare resulting from the operation noticeable at or beyond the property line, fire hazards, or electronic, electrical or electromagnetic interference. In a residential zone noise associated with the home occupation of more than 55 dba at the lot line is prohibited.
c. 
The home occupation shall be conducted entirely within the dwelling or any attached garage or within an unattached enclosed accessory building.
d. 
In residential zones, no structural alterations shall be made to the dwelling that would be inconsistent with future use of the building exclusively as a dwelling.
e. 
No alteration to or use of the premises shall be made such as to reduce the number of required on-site parking spaces.
f. 
In residential zones there shall be no display, other than the allowed sign, which would indicate from the exterior that the building is being used for any purpose other than a dwelling.
g. 
There is no visible outside storage of materials other than plant materials.
h. 
The use does not adversely affect the residential character of the neighborhood, nor infringe upon the right of neighboring residents to enjoy the peaceful occupancy of their homes.
i. 
There is not excessive generation of traffic created by the home occupation, including frequent deliveries and pickups by trucks or other vehicles.
j. 
All visits by suppliers or customers shall occur between the hours of 7:00 a.m. and 7:00 p.m.
k. 
Construction businesses may be allowed when vehicles are screened by a sight-obscuring fence, wall or hedge or vehicles are parked in a building. All repairs and storage of materials shall occur within a building. There shall not be more than two vehicles associated with the home occupation parked on the premises at one time.
l. 
Where a home occupation involves deliveries one off-street loading space shall be provided. If visits by customers occur, two additional off-street parking spaces shall be provided if the street along the lot frontage does not provide paved area for at least two parallel parking spaces within 100 feet of the residence. During normal loading/unloading or customer parking periods, the off-street loading and parking shall be reserved exclusively for that use.
m. 
The residence shall not be used as headquarters or main office for assembly or dispatch of employees to other locations.
n. 
The rental of separate living quarters within a single-family residence is limited to not more than one bedroom which does not contain separate cooking facilities and which has a maximum occupancy of two persons.
o. 
Home occupations conducted as a for-profit business shall obtain business licenses in accordance with Chapter 5.12 SMC.
3. 
Prohibited Home Occupation Uses.
a. 
Auto body repair and painting.
b. 
Ongoing mechanical repair conducted outside of an entirely enclosed building.
c. 
Storage and/or distribution of toxic or flammable materials, and spray painting or spray finishing operations which involve toxic or flammable materials which in the judgment of the fire chief of the Silverton fire district pose a dangerous risk to the residence, its occupants, and/or surrounding properties.
d. 
Junk and salvage operations.
e. 
Storage and/or sale of fireworks in quantities judged by the fire chief of the Silverton fire district to be dangerous.
f. 
Marijuana processors, producers, retailers, wholesalers, dispensaries, by any individual or businesses for commercial purposes for which a license from the OLCC is required, or grow sites.
4. 
Enforcement.
a. 
Complaints regarding home occupations may be initiated by the city of Silverton or the public. Complaints must be related to noncompliance with the standards listed above.
b. 
The community development director shall make a determination of whether the alleged violation of the home occupation provisions has occurred. The determination will result in allowing the use to continue as it exists, ordering termination, or bringing into compliance with the home occupation standards.
c. 
If a notice of termination or an order to bring the use into compliance is given, the respondent shall be provided a reasonable time to cure or remedy the alleged infraction after the notice is given. The time allowed shall not be less than 24 hours, nor more than 30 days. Where there is an extreme hardship, additional time may be granted to the respondent. Notwithstanding the remedial time period specified above, if the community development director determines that the alleged infraction presents an immediate danger to the public health, safety or welfare, or that any continuance of the violation would allow the respondent to profit from the violation or would otherwise be offensive to the public at large, the director may require immediate remedial actions.
d. 
If the community development director is unable to serve a notice of infraction on the respondent or, if after such service the respondent refuses or is unable to remedy the infraction, the city may proceed to remedy the infraction as provided in SMC § 15.08.790.
H. 
Manufactured Homes on Individual Lots. Manufactured homes are permitted on individual lots as single-family houses or duplexes, subject to all of the following design standards. Exception: The following standards do not apply to units that were lawfully placed within the city prior to the effective date of the ordinance codified in this code.
1. 
Floor Plan. The manufactured home shall be multi-sectional and have an enclosed floor area of not less than 1,000 square feet;
2. 
Roof. The manufactured home shall have a pitched roof with a slope not less than three feet in height for each 12 feet in width (14 degrees);
3. 
Residential Building Materials. The manufactured home shall have exterior siding and roofing which in color, material and appearance are similar or superior to the exterior siding and roof material used on nearby residences (e.g., horizontal wood or wood-appearance siding is considered “superior” to metal siding and roofing);
4. 
Garages and Carports. A garage or carport shall be provided and be constructed of materials like those used on the house;
5. 
Thermal Envelope. The manufactured home shall be certified by the manufacturer to meet the thermal envelope requirements equivalent to those for a single-family dwelling constructed under the State Building Code. Evidence demon-strating that the manufactured home meets current energy efficiency standards is deemed to satisfy the exterior thermal envelope certification requirement. Additional manufacturer certification shall not be required;
6. 
Placement. The manufactured home shall be placed on an excavated and backfilled foundation and enclosed at the perimeter such that the manufactured home is located not more than 16 inches above grade, unless greater height is required as a result of the floodplain overlay provisions (Chapter 2.5 SDC) and complies with the minimum set-up standards of the adopted state Administrative Rules for Manufactured Dwellings, OAR Chapter 918. Where the building site has a sloped grade, no more than 16 inches of the enclosing material shall be exposed on the uphill side of the home;
7. 
Foundation Skirt. The foundation area of the manufactured home shall be fully skirted with a decay-resistant material;
8. 
Prohibited. The manufactured home shall not be located in a designated historic district;
9. 
Design Standards. The manufactured home shall conform to the architectural design standards of SDC § 2.2.190.
I. 
Manufactured/Mobile Home Parks. Manufactured/mobile home parks (not including recreational vehicles) are permitted on parcels of one acre or larger, subject to compliance with subsections (I)(1) through (5) of this section:
1. 
Permitted Uses. Single-family residences, manufactured home park manager’s office, home occupations, and accessory structures that are necessary for the operation and maintenance of the manufactured dwelling park (e.g., landscape maintenance).
2. 
Space. The minimum size pad or space for each dwelling is 2,500 square feet; provided, that the overall density of the park does not exceed 12 units per acre. Each space shall be at least 30 feet wide and 40 feet long, in accordance with ORS 446.100(c).
3. 
Setbacks and Dwelling Separation. The minimum setback between park structures and abutting properties is five feet. The minimum setback between park structures and public street right-of-way is 15 feet. At least a 10-foot separation shall be provided between all dwellings. Dwellings shall be placed a minimum of 14 feet apart where flammable or combustible fuel is stored between units. Park structures shall be placed no closer than five feet to a park street or sidewalk/pathway. An accessory structure shall not be located closer than six feet to any other structure or dwelling, except that a double carport or garage may be built which serves two dwellings. When a double carport/garage is built, the carport/garage shall be separated from all adjacent structures by at least three feet.
4. 
Perimeter Landscaping. When manufactured dwellings are oriented with their back or side yards facing a public right-of-way, the city may require installation of fencing and planting of a landscape buffer between the right-of-way and a manufactured home park for the privacy and security of residents or aesthetics of the streetscape.
5. 
Dwelling Design (For Parks Smaller Than Three Acres). Manufactured dwellings in parks smaller than three acres shall meet the following design standards, consistent with ORS 197.314(6):
a. 
The manufactured dwelling shall have a pitched roof with a slope not less than three feet in height for each 12 feet in width (14 degrees); and
b. 
The manufactured dwelling shall have exterior siding and roofing which in color, material and appearance are similar or superior to the exterior siding and roof material used on nearby residences (e.g., horizontal wood or wood-appearance siding is considered “superior” to metal siding and roofing);
c. 
Exception. Subsections (I)(5)(a) and (b) of this section do not apply to manufactured dwellings that existed within the city prior to November 5, 2008.
J. 
Multiple-Family Housing. Where multifamily housing is allowed, it shall conform to all of the following standards, which are intended to promote livability for residents and compatibility with adjacent uses. Figure 2.2.200.H provides a conceptual illustration of the requirements listed below.
1. 
Building Design and Separation. The architectural design standards under SDC § 2.2.190 apply. In addition, when more than one multifamily building is built on a site, the buildings shall be separated from one another by a landscaped courtyard that is not less than 20 feet wide, unless the buildings are arranged end to end; in such case building separation may be reduced to 10 feet, provided no doorway or entry opens into the space between the buildings and applicable building codes are met.
2. 
Common Usable Open Space. Multiple-family developments shall incorporate not less than 15 percent common usable open space. Common usable open space shall be provided in accordance with all of the following criteria:
a. 
The site area is defined as the lot or parcel on which the development to be located, after subtracting any required dedication of street right-of-way and other land for public purposes (e.g., public park or school grounds, etc.);
b. 
In meeting the common usable open space standard, the multiple-family development shall contain one or more of the following: outdoor recreation area, protection of sensitive lands (e.g., trees preserved), playfields, outdoor playgrounds, outdoor sports courts, swimming pools, walking fitness courses, pedestrian amenities, or similar usable open space amenities for residents;
c. 
Historic buildings or landmarks within the project that are open to the public may count toward meeting the common open space requirements when approved by the planning commission;
d. 
All common open space areas shall have an average width that is not less than 20 feet and an average length that is not less than 20 feet;
e. 
The common open space requirement may be waived for a project that dedicates and improves a new public neighborhood park or playground of not less than one-quarter acre;
3. 
Private Open Space. Private open spaces shall be required for all ground-floor dwellings, and not less than 50 percent of all upper-story dwellings. “Private open space” shall be a patio, deck or other improved surface of not less than 48 square feet.
Figure 2.2.200.H – Examples of Multiple-Family Open Space
4. 
Trash Receptacles. Adequate solid waste storage and recycling facilities shall be provided. Trash receptacles shall be oriented away from building entrances, set back at least 10 feet from any public right-of-way and adjacent residences and shall be screened with an evergreen hedge or solid fence or wall of not less than six feet in height. Receptacles must be accessible to trash pick-up trucks.
K. 
Renewable Energy Facilities. Where renewable energy facilities are allowed, they shall require approval through conditional use review (Type III) and conform to all of the following standards:
1. 
Accessory Use. The use must be accessory to an allowed use within a residential district.
2. 
Maximum Height. Renewable energy facilities structures built according to the International Building Code shall be limited to a total height of 55 feet when approved by the planning commission and fire department.
3. 
Setbacks. Facilities which exceed 35 feet in height shall be set back a distance at least equal to the facility’s total height from all property lines.
4. 
Performance Standards. Renewable energy facilities shall not exceed the performance standards stated by SDC § 2.4.170(C).
5. 
Landscaping. Screening and buffering for the facility shall follow the standards of SDC § 3.2.300. When renewable energy facilities are allowed, the subject site shall be considered to be located within the IP district when applying the standards of the Screening and Buffering Matrix.
6. 
Exempt from Conditional Use Process. Installation and use of solar photovoltaic energy systems or solar thermal energy systems are exempt from the conditional use process and shall be processed as a Type I procedure if installation can be accomplished:
a. 
Without increasing the footprint of the structure.
b. 
Without increasing the peak height of the section of roofs with a slope of 6:12 or greater where the system is located.
c. 
This exemption does not apply to solar energy systems located on structures that are federally or locally designated historic buildings, on landmarks or conservation landmarks, and in a historic district or an area designated as a significant scenic resource unless the material used is designated anti-reflective or less than 11 percent reflective.
7. 
Other Permit or Licensing Requirements. The owner of the facility shall be responsible for obtaining and complying with all other applicable permit and/or licensing requirements.
L. 
Accessory Structure. Accessory structures shall conform to all of the following standards:
1. 
Floor Area. Accessory structures with a building footprint greater than 200 square feet and no more than 800 square feet are permitted under the Type I approval process. Accessory structures with a building footprint greater than 800 square feet may be permitted under the conditional use approval process.
2. 
Oregon Structural Specialty Code. The accessory structure shall comply with the Oregon Structural Specialty Code.
3. 
Development Standards. The structure shall conform to the lot standards in Table 2.2.120, except as modified below:
a. 
The height of an accessory structure shall not exceed 22 feet, unless permitted under the conditional use approval process.
b. 
Accessory structures with building footprints that exceed 200 square feet shall have exterior siding and roofing which in color, material and appearance are similar or superior to the exterior siding and roof material used on the primary residence.
c. 
The accessory structure shall be set back not less than 20 feet from the front property line, five feet from side property lines, and five feet from the rear property line.
M. 
Chickens. Where chickens are allowed, they shall conform to all of the following standards:
1. 
A lot shall be limited to the keeping of three or fewer chickens. Roosters are not permitted.
2. 
The chickens shall be housed in an enclosure behind the front facade of a house and a minimum of 10 feet from property lines and 20 feet from dwellings on adjacent properties.
3. 
The chickens shall be kept in a state that does not constitute a public nuisance, which includes, but is not limited to, chickens roaming at large, chickens kept in an unclean and unsanitary condition, and obnoxious smells and substances. If the community development director or designee determines a nuisance exists, the city shall follow the applicable regulations to abate the nuisance.
N. 
Transitional Shelter Communities. Transitional shelter communities shall comply with the following standards:
1. 
Transitional shelter communities are allowed on land that is currently in use as a religious institution or place of worship per SDC § 1.6.490.
2. 
Shelter Unit Type. Shelter units shall be stick-built structures or prefabricated structures but may not have fabric walls or roofs (e.g., tents, yurts, and membrane structures). Shelter units may not be vehicles, residential trailers, or manufactured dwellings. Each shelter unit shall be detached from any other shelter unit. Design of the units shall be compatible with the surrounding area.
3. 
Maximum Building Floor Space. The maximum building floor space for each shelter unit is 200 square feet.
4. 
Maximum Number of Units. The maximum number of units per parcel is one for every 10,000 square feet of area of the site the units are to be located on, rounded to the nearest whole number, or four units, whichever is less.
5. 
Maximum Number of Sites. Only two sites in the city are allowed to be operated as a transitional shelter community at any one time.
6. 
Length of stay is limited to 18 months for each participant.
7. 
Bathrooms and Kitchens. Bathrooms and kitchens are prohibited in the shelter units. Instead, common permanent bathroom facilities available all hours of all days shall be provided for the residents and kitchen facilities may be provided to residents.
8. 
Utilities. Water service, sanitary sewer service, natural gas service, propane heaters, and generators are prohibited in the shelter units but are permitted in common facilities. Adequate trash and recycling service is to be provided in the vicinity of the use.
9. 
Storage. No outdoor storage is permitted, excluding bicycles. Residents shall be provided with enclosed, secure storage facilities for their belongings.
10. 
Fencing. The transitional shelter community shall be adequately fenced from abutting properties (does not include adjacent properties) with sight-obscuring fencing a minimum of six feet in height.
11. 
Minimum Rear and Side Yard Depth. The minimum rear and side yard depth is five feet, except that if the rear or side yard abuts a residential district, the minimum shall be 20 feet from the abutting lot line.
12. 
Minimum Structure Separation. Structures shall be separated from one another by a minimum of six feet.
13. 
Conditional Use. Transitional shelter communities shall be reviewed as a conditional use; however, no fee shall be charged for such review.
14. 
Periodic Review and Renewal. Transitional shelter communities shall require periodic review and renewal. The first periodic review and renewal shall be conducted six months from occupancy and shall follow the conditional use review procedure. If renewal is approved, periodic review and renewal shall be conducted annually from that point, following the conditional use review procedure.
15. 
Financial security (bonds, petitions, cash, etc.) to ensure the removal of the improvements should approval not be renewed shall be provided to the city prior to occupancy.
16. 
The person in charge (owner-occupant, tenant, lessee or person other than an owner who has possession and/or control of the property) shall provide local contact information, name and telephone number, to all property owners and residents within 500 feet of the site on an annual basis. The local contact person must be available to accept and immediately respond to telephone calls during business hours. Any change in local contact person must be reported to the city and property owners and residents within 500 feet of the site at least seven days prior to the date the change takes effect.
17. 
An operations, security, and case management plan for the transitional shelter community shall be submitted to the city at the time of application for review and approval.
18. 
Code of Conduct. The managing agency shall provide to all residents of the transitional shelter community a code of conduct for living at the transitional shelter community, including information regarding the noise disturbance standards of SMC § 8.04.055, the chronic nuisance property standards of Chapter 8.06 SMC, and the Periodic Review and Renewal timetable. A copy of the code of conduct shall be submitted to the city at the time of application for review and approval.
19. 
Priority should be given to individuals that have been living within or near Silverton for the past year.
20. 
Occupancy shall be limited to one person per shelter unit.
O. 
Nano Radio Frequency Transmission Facilities. Nano radio frequency transmission facilities shall comply with the following standards:
1. 
Facilities are only allowed to be installed on existing residential dwellings or nonresidential primary structures.
2. 
Antenna size for each site is limited to 12 square feet cumulatively with no individual antenna larger than five square feet.
3. 
Antenna size on a site located on a nonresidential primary structure may be allowed up to 75 square feet in area provided the review body finds there will be no adverse impacts to the surrounding area.
4. 
Antenna shall be attached via a monopole, J-pole, or tripod to the structure or flush mounted to the structure. The monopole shall not exceed three inches in diameter, with up to three guy wires with no guy wire larger than one-quarter inch in diameter, if used. Lattice towers are not permitted.
5. 
Antenna and associated supports shall not exceed five feet in height or project more than two feet horizontally from the structure it is attached to, if flush mounted. Antenna may be up to 10 feet tall if located on a gable roof, provided the ridge line runs parallel with the street and the antenna is located on the roof section adjacent to the rear yard on an interior lot, with no part of the antenna extending five feet above the ridge line.
6. 
All support and ancillary equipment associated with the antenna larger than two cubic feet in volume with any individual dimension larger than 18 inches shall be placed underground or inside the existing structure the antenna is to be attached to. Ground cabinets are prohibited.
7. 
Brackets (mounting) and cabling shall be similar in color to the primary structure they are attached to.
8. 
Facilities may generate no more than 35 dBA within three feet of any residential dwelling or city park boundary, and no more than 40 dBA within 10 feet of any other property.
9. 
No logos or brand names shall be legible from the right-of-way.
10. 
Nano radio frequency transmission facilities are limited to devices, equipment, machinery, structures or supporting elements that produce nonionizing electromagnetic radiation within the range of frequencies from 100 KHz to 60 GHz operating as a discrete unit to produce a signal or message and which are not intended for 5G service. Antennas on residential structures are limited to 250 watts. Antennas on nonresidential primary structures are limited to 500 watts.
11. 
Facilities shall be located on the property only when the property owner has a current agreement with the provider. The facilities shall be removed by the provider when the property owner no longer has an agreement with the provider.
12. 
Facilities that do not meet the above standards may be reviewed through the conditional use process of Chapter 4.4 SDC.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 16-01 § 2, 2016; Ord. 18-22 § 6, 2018; Ord. 19-05 § 2, 2019; Ord. 21-04 §§ 10 – 13, 2021)

§ 2.3.100 Commercial districts – Purpose and applicability.

A. 
Purpose. This chapter provides three distinct commercial zones covering Silverton’s downtown commercial, downtown commercial fringe, and general commercial areas. The districts are intended to:
1. 
Maintain and enhance Silverton’s small-town character and historic resources;
2. 
Promote efficient use of land and urban services;
3. 
Create a mixture of land uses that encourages employment and housing options in close proximity to one another;
4. 
Provide formal and informal community gathering places and opportunities for socialization (i.e., along an active street front);
5. 
Encourage pedestrian-oriented development in all commercial areas;
6. 
Provide connections to and appropriate transitions between residential areas and commercial areas;
7. 
Apply land use and design standards to automobile-oriented and automobile-dependent uses that promote pedestrian safety, aesthetics, and economic development;
8. 
Provide for visitor accommodations and tourist amenities;
9. 
Reinforce downtown Silverton as the historic heart of the community.
a. 
Downtown Commercial District. The downtown commercial district is one of the zoning districts that implement the commercial comprehensive plan designation. The purpose of the downtown commercial district is to preserve and enhance Silverton’s downtown as the historic heart of the community. The DC district is intended as Silverton’s center of vital retail activity, services, entertainment, mixed use, civic buildings and public spaces. The historic character of the downtown, together with its pedestrian-oriented architecture, streets and public spaces, define the district.
b. 
Downtown Commercial Fringe District. The downtown commercial fringe district is one of the zoning districts that implement the commercial comprehensive plan designation. The purpose of the downtown commercial fringe district is to provide a transition between the DC district and adjacent neighborhoods and commercial areas. The DCF district is intended as a mixed use area, where commercial, residential and mixed use buildings co-exist and complement the downtown. Architecture reflecting the historic character of the area, and pedestrian-oriented streetscapes, define the DCF district.
c. 
General Commercial District. The general commercial district is one of the zoning districts that implement the commercial comprehensive plan designation. The purpose of the general commercial district is to provide for a wide variety of commercial and mixed uses. Design standards and options in the GC district are intended to ensure that buildings are appropriately oriented to streets and pedestrian facilities are provided in commercial developments. The GC district is Silverton’s location for larger format retailing, except where planned development overlays dictate otherwise.
B. 
Applicability. Commercial zoning districts shall be applied consistent with the land use designations on the city of Silverton comprehensive plan. The format of this section includes standards that apply to all commercial districts that are titled “commercial districts.” Standards that relate to a specific commercial district (DC, DCF and GC) are listed specifically under that district heading. Developments have an option to modify code standards through a Type III procedure by following the design review performance option per SDC § 4.2.510.
(Ord. 08-06 § 3, 2008)

§ 2.3.110 Commercial districts – Allowed land uses.

Table 2.3.110 identifies the land uses that are allowed in the commercial districts. The specific land use categories are described and uses are defined in Chapters 1.5 and 1.6 SDC.
Table 2.3.110 – Uses Permitted in Commercial Districts
Use Categories
(Examples of uses are in Chapter 1.6 SDC; definitions are in Chapter 1.5 SDC)
Downtown Commercial (DC)
General Commercial (GC)
Downtown Commercial (DCF)
Residential Categories
 
 
 
All residential uses (household living and group living) allowed, if:
 
 
 
- Lawfully existing as of September 1, 2006 (SDC § 2.3.160(E)), or
S
S
S
- Replacement or rebuilding of residential structure conforming to the same footprint as previously existed as of November 5, 2008, or
P
P
P
- New dwelling, free-standing (not above commercial use), or
N
CU
P
- New dwelling(s) built in conjunction with a permitted commercial use, including caretaker dwellings (residential use allowed above ground floor commercial only)
P
P
P
Group living uses shall conform to the provisions in SDC § 2.2.200.
Commercial Categories
 
 
 
Drive-up/drive-in/drive-through (drive-up windows, kiosks, ATMs, similar uses/facilities), per SDC § 2.3.160(A)
CU+S
CU+S
CU+S
Bed and breakfast inn, per SDC § 2.2.200
P
P
P
Educational services, not a school (e.g., tutoring or similar services)
P
P
P
Entertainment, major event
CU
CU
N
Mobile food vendor, per SDC § 2.3.160(B)
S
S
S
Offices
P
P
P
Outdoor recreation, commercial
CU
CU
CU
Parking lot (when not an accessory use)
CU
CU
CU
Quick vehicle servicing or vehicle repair. (See also drive-up/drive-in/drive-through uses, per SDC § 2.3.160)
- Fully enclosed (e.g., garage)
CU
P
N
- Not enclosed
N
CU
N
Retail sales and service (See also drive-up uses, per SDC § 2.3.160)
- Fully enclosed (e.g., garage)
P
P
P
- Not enclosed (other than accessory uses)
N
N
N
- Eating establishments as an accessory use, enclosed in same building with primary use
P
P
P
- Eating establishment not enclosed, per SDC § 2.3.160(C)
S
S
S
Self-service storage
N
CU
N
Industrial Categories
 
 
 
Industrial service (See also drive-up uses)
- Fully enclosed (e.g., office)
N
P
CU
- Not enclosed
N
CU
N
Manufacturing and production
- Fully enclosed
CU
P
CU
- Not enclosed
N
CU
N
Warehouse and freight movement
N
CU
N
Waste-related
N
N
N
Wholesale sales
 
 
 
- Fully enclosed
N
P
CU
- Not enclosed
N
CU
N
Institutional Categories
 
 
 
Basic utilities
P
P
P
Renewable energy facilities
 
 
 
- Accessory uses
CU + S
CU + S
CU + S
- Primary uses
N
S
N
Nonrenewable energy facilities
N
N
N
Funeral services
P
P
P
Cemeteries, mausoleums, and crematoriums
CU
CU
CU
Colleges
P
P
P
Community service
CU
CU
CU
Daycare, adult or child daycare; family daycare (16 or fewer children) under ORS 657A.250
CU
CU
CU
Jails and detention facilities
N
CU
N
Parks and open space
P
P
P
Religious institutions and houses of worship
 
 
 
- Lawfully existing as of November 5, 2008
P
P
P
- New facilities
CU
CU
CU
- Transitional shelter communities, per the standards in SDC § 2.2.200(N)
CU
CU
CU
Schools
 
 
 
- 20 or fewer students
P
P
P
- More than 20 students
CU
CU
CU
Other Categories
 
 
 
Accessory structures (with a primary permitted use)
P
P
P
Agriculture – Animals
N
N
N
Agriculture – Nurseries and similar horticulture (see also wholesale and retail uses)
CU
CU
N
Agriculture – Marijuana producers and grow sites enclosed, per SDC § 2.4.160(B)
N
CU
N
Agriculture – Marijuana producers and grow sites nonenclosed
N
N
N
Historic building alterations, per Chapter 3.5 SDC
S
S
S
Mining
N
N
N
Radio frequency transmission facilities and telecommunication towers and antennas, except those allowed as ancillary to a primary permitted use
N
CU
N
Nano radio frequency transmission facilities, per SDC § 2.2.200(O), provided facilities are not visible from the street.
S
S
S
Rail lines and utility corridors, except existing facilities on nonzoned railroad properties are permitted
CU
CU
CU
Temporary uses (limited to “P” and “CU” uses), per SDC § 4.9.100
P/CU
P/CU
P/CU
Transportation facilities (operation, maintenance, preservation, and construction in accordance with the city’s transportation system plan)
P
P
P
Key:
P = Permitted, subject to land use review or design review (Chapter 4.2 SDC). Other uses may be allowed with a planned development
S = Permitted with standards (SDC § 2.3.160). Other uses may be allowed with a planned development
CU = Conditional use required (Chapter 4.4 SDC). Other uses may be allowed with a planned development
N = Not permitted
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 16-01 § 4, 2016; Ord. 18-22 § 4, 2018; Ord. 19-05 § 3, 2019)

§ 2.3.120 Commercial districts – Development standards.

The development standards in Table 2.3.120 apply to all new structures, buildings, and development, and major remodels, in the commercial districts. In addition to meeting the following standards, project proposals must be reviewed through design review.
Table 2.3.120 – Development Standards for Commercial Districts
Standard
DC
GC
DCF
Minimum Lot Area* (square feet)
*Development must conform to lot width, depth, yard setback and coverage standards.
1,600 sq. ft.
6,000 sq. ft.
1,600 sq. ft.
Minimum Lot Width
Not limited
Not limited
20 ft.
Minimum Lot Depth
Not limited
Not limited
80 ft.
Building/Structure Height and Footprint
Maximum height
55 ft.
45 ft.
35 ft.
Maximum building footprint with a single user
45,000 sq. ft.
45,000 sq. ft.
45,000 sq. ft.
Fences and Walls – Maximum Height at Street Right-of-Way. See also SDC § 3.1.200(N), Vision Clearance; and SDC § 3.2.500, Fences and walls)
42 inches
42 inches
42 inches
Impervious Surface (Maximum)
100%
90%
90%
Landscape Area (Minimum)
Landscape area may include plant areas and some nonplant/hardscape areas, as allowed under SDC § 3.2.300(D).
0%
10%
10%
Minimum Setbacks:
(See also SDC § 2.3.150(E), Design Standards for Properties Adjacent to North 1st, North Water and C Streets; and SDC § 2.3.160(A), Drive-Up/Drive-In/Drive-Through Facilities.)
Per building code
Per building code
Per building code, except 5 ft. side yard and 10 ft. rear yard (minimum) when abutting residential district
Build-To Line (feet)*:
(See also SDC § 2.3.150(E), Design Standards for Properties Adjacent to North 1st, North Water and C Streets; and SDC § 2.3.160(A), Drive-Up/Drive-In/Drive-Through Facilities.)
New Buildings Only: At least one primary building entrance shall be built no farther from the street right-of-way than the build-to line; except where a greater setback is required for a planned street improvement, then the build-to line increases proportionately.
The build-to line may also be increased through design review when pedestrian amenities are provided between a primary building entrance and the street right-of-way. (See also SDC §§ 2.3.170 and 2.3.180.)
Inadequate Right-of-Way: On streets with inadequate right-of-way, the primary building entrance shall be built not farther from the intended street right-of-way. These streets include, but are not limited to, Lane, McClaine, 3rd, and Park between 2nd and 3rd.
0 ft.
0 – 20 ft. (per SDC § 2.3.150(E))
5 – 20 ft.
*Additional street setbacks beyond those required by SDC § 2.3.120 may apply, as required by the city of Silverton transportation system plan (TSP), or the TSP of other road authority(ies), for the purpose of maintaining a clear area for planned future street improvements.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.3.130 Commercial districts – Zero setbacks and build-to line.

A. 
Zero Setbacks and Build-To Line – Purpose; Fire Code; and Clear Vision. The setbacks and build-to lines, as provided in Table 2.3.120, are intended to encourage pedestrian-oriented development, while providing more flexibility in site design than what is possible with large setbacks. With buildings placed close to the street, a development affords good access for emergency service providers in the case of a fire or other emergency. Where no minimum setback is required, all structures and buildings shall conform to the vision clearance standards in Chapter 3.1 SDC and the applicable fire and building codes (e.g., for attached structures, fire walls, and related requirements).
B. 
Setback Yards – Reverse Frontage Lots. Buildings on reverse frontage lots (through lots), or lots that front onto more than one street, shall be required to meet the build-to line standard on only one street. The approval body may require that the build-to line apply to the highest-order street. Reverse frontage lots are subject to the fence height and setback requirements in this section and the landscape buffer requirements in Chapter 3.2 SDC.
(Ord. 08-06 § 3, 2008)

§ 2.3.140 Commercial districts – Lot coverage and impervious surfaces.

Impervious surfaces are regulated under Table 2.3.120. Lot coverage is not limited; provided, that impervious surface limitations are met.
(Ord. 08-06 § 3, 2008)

§ 2.3.150 Commercial districts – Building orientation and commercial block layout.

A. 
Purpose. This section orients buildings close to streets to promote pedestrian-oriented development where walking is encouraged, and to discourage automobile-dominated development. Placing commercial storefronts and other buildings close to the street also encourages crime prevention, natural surveillance or security, and safety by having more “eyes on the street.”
B. 
Applicability. This section applies to all new buildings and major remodels that are subject to design review.
Figure 2.3.150.C(1) – Building Orientation
C. 
Building Orientation Standards. Developments subject to this section shall have their buildings oriented to a street, as generally shown in Figure 2.3.150.C(1). All of the following criteria must be met:
1. 
Compliance with the setback and build-to line standards in SDC § 2.3.130, where applicable. The build-to line may be set back to provide additional space for pedestrian amenities between a building and its adjoining street. In the DC zone, the maximum setback is five feet.
2. 
Except as provided in subsections (C)(4) and (5) of this section, all buildings shall have at least one primary building entrance (i.e., a dwelling entrance, tenant entrance, lobby entrance, or breezeway/courtyard entrance) facing an adjoining street (i.e., within 45 degrees of the street property line), or if the building entrance is turned more than 45 degrees from the street (i.e., front door is on a side elevation), the primary entrance shall not be more than 60 feet in the GC district, except to provide pedestrian amenities; a walkway shall connect the primary entrance to the sidewalk. In the DCF zones, all buildings with street frontage must have at least one primary building entrance facing an adjoining street. Additionally, street-facing facades of buildings shall provide an entrance at least every 45 feet along the street.
3. 
In the DC and DCF district, off-street parking, driveways, and other vehicle areas shall not be placed between buildings and the street(s) to which they are oriented. Off-street parking shall be oriented internally to the site, with parking bays separated by landscaping, as generally shown in Figure 2.3.150.C(2). Bays shall contain no more than 10 parking spots each, as an average over all contiguous parking bays on the same parcel.
Figure 2.3.150.C(2) – Building Orientation with Internal Parking
4. 
In the GC district, the building orientation standard may be met with vehicle areas allowed between the street right-of-way and a building’s primary entrance when the approval body finds that all of the following criteria are met:
a. 
Placing vehicle areas between the street right-of-way and the building’s primary entrance will not adversely affect pedestrian safety, comfort or convenience, based on the distance from the street sidewalk to the building entrance, projected vehicle traffic volumes, and available pedestrian walkways;
b. 
The proposed vehicle areas are limited to one drive aisle of not more than 20 feet in width with adjoining bays of not more than eight consecutive parking spaces per bay (including ADA accessible spaces) on the side(s) of the drive aisle. (The intent of which is to create a drive aisle that is street-like, and to break up parking into small bays with landscaping); and
c. 
The building’s primary entrance is connected to an adjoining street by a pedestrian cross-walk as specified under SDC § 3.1.300.
5. 
Where a development contains multiple buildings and there is insufficient street frontage to which buildings can be oriented, a primary entrance may be oriented to a plaza or courtyard. When oriented in this way, the primary entrance(s) plaza or courtyard shall be connected to the street by a pedestrian walkway meeting the standards in SDC § 3.1.300.
D. 
Block Layout (Pedestrian-Orientation) Standard. Developments containing more than one building, including commercial subdivisions with outlying commercial pads, shall meet all of the following standards:
1. 
The site shall be configured into blocks having frontage onto streets, interior parking courts (as generally shown in Figure 2.3.150.C(2)), or shopping streets (as generally shown in Figure 2.3.150.C(3)). All parking courts and shopping streets shall contain on-street parking bays (parallel or angled parking), street- or plaza-facing building entrances and sidewalks with street trees, pedestrian lighting and furnishings (benches and trash receptacles) where appropriate;
2. 
In the GC district, blocks shall not exceed 400 feet in length, and shall have a perimeter not exceeding 1,400 feet. Pedestrian walkways inside buildings are not counted as block edges. In the DC and DCF districts, blocks shall not generally exceed 250 feet in length and 160 feet in width, in keeping with the historic block pattern in the downtown;
3. 
Pedestrian pathways shall connect the street right-of-way to building entrances and the interior parking courts between buildings to ensure reasonably safe, direct, and convenient access to building entrances and off-street parking.
Figure 2.3.150.C(3) – Shopping Street Example
E. 
Properties Adjacent to North 1st, North Water and C Streets. This section applies only to properties designated GC. For properties in the DC and DCF districts, the standards of SDC § 2.3.150(A) through (D) apply. A wide variety of site conditions exist along North 1st, North Water and C Streets, making it difficult to apply uniform design standards to the properties designated general commercial. Some buildings are placed right up to the highway, while others are set back behind parking. Therefore, the site layout should be designed to accomplish the following objectives:
1. 
Improve safety for all modes of transportation;
2. 
Better integrate land use and transportation planning;
3. 
Protect and enhance aesthetic values;
4. 
Promote human-scale development that is compatible with Silverton’s small-town character.
F. 
Site Design in Commercial Districts. In determining the specific access, circulation, building orientation, and street frontage standards that apply to a particular project, the applicant, in consultation with the community development director, shall select from the following prototypes:
Table 2.3.150.F – Site Design in Commercial Districts
Site Design Performance Standards (see pages that follow)
Downtown Commercial (DC)
General Commercial (GC)
Downtown Commercial Fringe (DCF)
1. Corner property
P
P
P
2. Front entrance at street
P
P
P
3. Building at street with side entrance
N
P
N
4. Building setback with side entrance
N
S
N
5. Parking in front with joint access and shared driveway
N
S
N
6. Parking in front without joint access or shared driveway
N
S
N
7. Property with grade change; retaining wall between sidewalk and building
S
S
S
Key:
P = Permitted, subject to land use or design review (Chapter 4.2 SDC)
S = Subject to community development director approval (see criteria under each standard)
N = Not permitted
1. 
Corner Property (Performance Standard No. 1). On corner properties buildings shall be oriented to the corner, with vehicle access provided from a side street. Primary building entrances shall be located within 20 feet of a street and the building shall meet transparency and weather protection standards along all street-facing elevations. If the primary building entrance is more than 20 feet from the sidewalk, then a 10-foot landscape buffer or civic space is required between the building and sidewalk.
2. 
Front Entrance at Street (Performance Standard No. 2). On noncorner parcels, the building shall be oriented to the street and have a primary entrance placed at street edge or within 20 feet of edge; this distance may be increased only where a civic space abuts the sidewalk and primary building entrance and no parking is allowed between the building and highway. The building shall meet weather protection and transparency standards along all street-facing elevations.
3. 
Building at Street with Side Entrance (Performance Standard No. 3). Where the community development director determines that a building may have its primary entrance placed on a side elevation not facing a street, a primary building entrance shall be placed within 40 feet of a street right-of-way and a pedestrian pathway shall connect the entrance directly to the right-of-way. There shall be no parking located between the building and the subject street. The building shall meet weather protection and transparency standards on all street-facing elevations.
4. 
Building Setback with Side Entrance (Performance Standard No. 4). Where the community development director determines that a building may be oriented to an internal parking area and it may have its primary entrance placed on a side elevation, the following standards shall apply: All street-facing elevations and elevations on which a primary building entrance is placed shall meet the transparency and weather protection requirements of this chapter. There shall be no parking placed between the building and subject street; buildings with primary entrances more than 40 feet from the highway edge need not meet weather protection and transparency standards along the street frontage; provided, that a landscape buffer of 20 to 30 feet in width shall be required. Plantings shall create horizontal and vertical screening of any large wall not meeting the transparency standard of this chapter in the GC and DCF only.
5. 
Parking in Front (Performance Standard No. 5). Where the community development director finds that multiple buildings and/or building pads should be set back from the street behind surface parking and oriented to internal driveways instead of streets, such driveways shall be designed as “shopping streets.” Shopping streets shall contain, at a minimum, on-street parking, sidewalks/walkways with raised curbs, street trees and pedestrian lighting, as generally shown below. Such buildings may have their primary entrance(s) placed along the shopping street instead of a public street; in such cases, primary building entrances shall be within 10 feet of a walkway (eight-foot minimum width), except where a civic space (e.g., plaza or outdoor seating area) is provided the setback may be increased accordingly. Surface parking shall be set back and screened from the street behind a 20-foot minimum landscape buffer. Buildings shall meet the weather protection and transparency standards of this chapter along all shopping streets.
6. 
Parking in Front without Shopping Street (Performance Standard No. 6). Where the community development director finds that it is necessary to place surface parking between a building’s primary entrance and the street, and it is not possible to develop an internal shopping street as described above, e.g., due to the small size of a property, its configuration, or other physical site constraints, then the following standards shall apply: All surface parking and internal drives shall be set back at least 20 feet from the street behind a landscape buffer; adequate vehicle queuing distances shall be provided between the street and all parking areas, subject to design review; a six-foot minimum width walkway shall connect the primary building entrance to a public sidewalk with four-foot minimum width planter strips placed between such walkways and abutting driveways; raised or textured paving with ADA wheelchair-accessible ramps shall be provided at all pedestrian crossings of vehicle areas; and provisions shall be made for potential future driveway extensions as adjacent properties develop or street connections can be made.
7. 
Property with Grade Change (Performance Standard No. 7). Where retaining walls are required adjacent to a public right-of-way, they shall incorporate rusticated concrete block, natural stone, or striated or battered concrete with a natural stone color. Applications for design review shall include proposed retaining wall detail drawings.
(Ord. 08-06 § 3, 2008)

§ 2.3.160 Commercial districts – Special use standards.

This section provides special use standards for those uses so designated in Table 2.3.110.
A. 
Drive-Up/Drive-In/Drive-Through Uses and Facilities. When drive-up or drive-through uses and facilities are allowed, they shall conform to all of the following standards, which are intended to calm traffic, and protect pedestrian comfort and safety:
1. 
Access to the drive-up/drive-through facility shall be from an alley, interior access way, (e.g., parking area) driveway, and/or private or public street when the other alternatives are not practicable. When access is provided from a public or private street, the drive-up/drive-in/drive-through facility shall be located on the site such that vehicles waiting to access the drive-up/drive-in/drive-through facility are not blocking the free flow of travel on the street, nor is the street being used to accommodate vehicles waiting to use the facility.
2. 
None of the drive-up, drive-in or drive-through facilities (e.g., driveway queuing areas, windows, teller machines, service windows, kiosks, drop-boxes, or similar facilities) are located within 20 feet of a street and shall not be oriented to a street corner. (Walk-up-only teller machines and kiosks may be oriented to a street or placed adjacent to a street corner).
3. 
Drive-up/drive-in queuing areas shall be designed so that vehicles do not obstruct a driveway, fire access lane, walkway, or public right-of-way.
4. 
The minimum spacing of drive-up, drive-in, and drive-through facilities receiving access onto the same street is 400 linear feet along that street’s block face (same side of street).
5. 
For restaurants, at least one designated parking space immediately beyond the service window, or other satisfactory methods, to allow customers requiring excessive waiting time to receive their food while parked.
6. 
Commercial establishments providing drive-up window facilities that do not provide for walk-in customer service (i.e., not allowing transactions within the structure) shall provide for safe, convenient and readily accessible exterior walk-up window service. At least two parking spaces shall be provided allowing convenient access to the walk-up service window.
7. 
The design of vehicle stacking areas shall allow customers’ vehicles to leave the stacking line for emergency reasons.
8. 
On-site parking for walk-in customers shall be designed to be readily accessible to all public entrances to the building and to provide safe, convenient access.
9. 
Establishments having drive-up window facilities shall have sufficient stacking area to ensure that public rights-of-way and driveways are not obstructed, as determined by the director of public works.
10. 
The communication sound system shall not exceed a measurement of 55 decibels at the adjoining property line.
B. 
Mobile Food Vendors. Where mobile food vendors are allowed, they shall conform to all of the following standards, which are intended to protect the public health, safety and welfare. The owner shall submit a site plan drawn to scale with supporting written information to the director demonstrating compliance with all of the following criteria. A mobile food vendor shall not commence operations until the city has issued approval in writing.
1. 
“Mobile food vendor,” for the purposes of this section, means any kiosk, shed, shelter, trailer, vehicle, wagon, or other similar device which is used for the purpose of preparing, processing, or converting food for immediate consumption as a drive-in, drive-through, curb, or walk-up service that remains in or on any one site or tax lot.
2. 
The use shall be limited to the preparation and/or sale of food and beverages.
3. 
The use shall not be conducted within public rights-of-way unless a special permit is issued by the city for this purpose.
4. 
The use shall be conducted on private property only with the written consent of the property owner.
5. 
Business operations shall be conducted between the hours of 7:00 a.m. and 10:00 p.m.
6. 
The use shall conform to all setback standards, vision clearance requirements and other standards of the district in which it is located.
7. 
The use shall not block driveways, entrances or parking aisles, or be placed in a landscaped planter required by this code.
8. 
Signs associated with the use shall be limited to six square feet total surface area of all sign faces including menu boards.
9. 
A trash receptacle shall be located within 10 feet of the use, which shall be maintained by the owner or operator of the mobile food vendor.
10. 
The combined floor area of the use, including all enclosed structures and decks, shall not exceed 128 square feet.
11. 
The operator of the use shall possess valid county certification of compliance with health and sanitation standards as applicable.
12. 
A city transient merchant permit is required pursuant to Chapter 5.40 SMC.
C. 
Outdoor Seating Areas within the Public Right-of-Way. Where outdoor seating areas are desired by restaurants or other business establishments, they must comply with the following procedures and criteria:
1. 
Submit a written request to the community development department identifying the area involved, a site plan of the area, a description of the operating characteristics of the proposed use or other pertinent information.
2. 
Accompanying the written request shall be a completed city of Silverton application to occupy the right-of-way and the associated review fee.
3. 
The community development director within 45 days of receipt will review the application and make a final decision.
4. 
In some cases the request may be forwarded to the city council for final approval.
5. 
Approval may be given provided the community development director or city council determine there will be no negative impact to the public, the right-of-way or nearby businesses or property owners.
6. 
Compliance with other applicable provisions of the city’s municipal code, including permits for using the public right-of-way where sidewalk cafes are allowed.
7. 
Design review approval where the outdoor eating area includes seating for more than eight patrons.
8. 
Where adjacent or abutting a residential use and/or zoning district, the outdoor eating area shall only be allowed between the hours of 8:00 a.m. and 10:00 p.m.
9. 
The outdoor eating area shall contain a trash receptacle within 10 feet of the use, which shall be maintained by the owner or operator of the restaurant.
10. 
At least four feet of open passageway is maintained on the sidewalk.
D. 
Renewable Energy Facilities. Where renewable energy facilities are allowed, they shall require approval through conditional use review (Type III) and conform to all of the following standards:
1. 
Primary or Accessory Use. The use may be primary or accessory to an allowed use within the general commercial district. Renewable energy facilities may only be accessory to an allowed use with the downtown commercial and downtown commercial fringe districts.
2. 
Maximum Height. Renewable energy facilities structures built according to the International Building Code shall be limited to a total height of 55 feet within the DC district, 65 feet within the GC district, and 55 feet within the DCF district when approved by the planning commission and fire department.
3. 
Setbacks. Facilities which exceed 35 feet in height within the DCF district shall be set back a distance at least equal to the facility’s total height from all property lines. Facilities within the DC and GC districts shall meet the standard setbacks of those districts.
4. 
Performance Standards. Renewable energy facilities shall not exceed the performance standards stated by SDC § 2.4.170(C).
5. 
Landscaping. Screening and buffering for the facilities within DC and GC districts shall follow the standards of SDC § 3.2.300. When renewable energy facilities are allowed within the DCF district, the subject site shall be considered to be located within the IP district when applying the standards of the Screening and Buffering Matrix.
6. 
Other Permit or Licensing Requirements. The owner of the facility shall be responsible for obtaining and complying with all other applicable permit and/or licensing requirements.
E. 
Special Status for Single-Family Residences in Commercial and Industrial Districts. Notwith-standing the restrictions of any other provisions of the Silverton Municipal Code, all single-family dwellings built before September 1, 2006, on commercial or industrially zoned properties are considered as pre-existing conforming uses. If any building on these properties is substantially destroyed, as defined in Chapter 5.2 SDC, it may be rebuilt to the same size as existed when it was destroyed, subject to the regulations of any applicable overlay district. If a pre-existing single-family residence is converted to a permitted commercial, office or industrial use, the special status granted here is rescinded, and the use of the property must thereafter conform to the requirements of the applicable zoning district. New dwellings may be established only in accordance with the provisions in the applicable zoning district.
People residing in a dwelling unit in a commercial district intending to start a commercial use may request the commercial use be classified as a home occupation use provided the commercial use is accessory to the residential use and the home occupation standards of SDC § 2.2.200(G) are met.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014)

§ 2.3.170 Commercial districts – Pedestrian amenities.

A. 
Purpose and Applicability. This section provides standards for pedestrian amenities when pedestrian amenities are required as part of new developments and major remodels, and when pedestrian amenities are provided to meet the requirements of other code sections. Pedestrian amenities serve as informal gathering places for socializing, resting, and enjoyment along street frontages, and they support the community’s public safety and transportation objectives through natural surveillance and walkability.
B. 
Standards. All new developments and major remodels in the GC and DC zones shall provide one or more of the “pedestrian amenities” as generally illustrated in Figure 2.3.170.B. Pedestrian amenities may be provided within a street furnishing zone, building frontage zone, or plaza, or within the pedestrian through zone, as shown in Figure 2.3.170.B; provided, that applicable minimum clearance and ADA standards are met. Use of the public right-of-way requires approval by the roadway authority.
Figure 2.3.170.B – Examples of Pedestrian Amenities
1. 
New developments and major remodels in the GC zone may use the elements listed below to fulfill this standard:
a. 
A plaza, courtyard, square or extra-wide sidewalk next to the building entrance with a minimum width of five feet.
b. 
Sitting space (e.g., dining area, benches, garden wall or ledges between the building entrance and sidewalk) with a minimum of 16 inches in height and 30 inches in width.
c. 
Public art that incorporates seating (e.g., fountain, sculpture).
d. 
Transit amenity, such as bus shelter, per the standards of the transit service provider, as applicable.
e. 
Decorative sidewalk paving.
f. 
Planters.
g. 
Covered entryway with seating.
2. 
New developments and major remodels in the DC zone may use the following amenities and streetscape elements identified in the downtown master plan to fulfill this standard, including:
a. 
A plaza, courtyard, square or extra-wide sidewalk next to the building entrance with a minimum width of five feet;
b. 
Sitting space (i.e., dining area, benches, garden wall or ledges between the building entrance and sidewalk) with a minimum of 16 inches in height and 30 inches in width;
c. 
Public art that incorporates seating (e.g., fountain, sculpture);
d. 
Transit amenity, such as a bus shelter, per the standards of the transit service provider, as applicable;
e. 
Preferred streetscape furnishings where applicable, including street lamp, bike rack, street bench, crosswalk, bollard, trash can, kiosk, tree grate and curb extension.
(Ord. 08-06 § 3, 2008)

§ 2.3.180 General commercial district design standards.

A. 
Purpose. This section promotes the public health, safety, and welfare by requiring at least a minimum level of design on every building in the general commercial district. Design is important to identifying Silverton as a unique place with successful commercial areas. The design standards are intended to:
1. 
Encourage architecture that is consistent with the character of Silverton.
2. 
Ensure that new development creates a close, intimate human scale and architectural designs address all four sides of a building.
3. 
Encourage the use of contextually appropriate materials, textures and colors.
4. 
Promote pedestrian-oriented uses by orienting buildings and their entrances to the street or to civic spaces abutting the street.
5. 
Create vibrant civic spaces (e.g., plazas, public art, cafe seating areas, etc.) oriented to take advantage of southern exposures; civic spaces should help identify the village, create intrigue, and offer weather protection and comfort to pedestrians while adding value to adjoining properties.
6. 
Break down large building masses and provide visual interest along the street.
7. 
Balance rhythm and continuity – encourage creativity in the design of building elevations, rooflines and facade elements.
8. 
Treat corner lots as focal points with vertical elements, public art, seating, and other design features.
9. 
Provide weather protection where commercial and mixed-use buildings abut the street.
B. 
Applicability. The following standards are applied through design review prior to building permit review. The applicant is required to demonstrate that the standards are met by complying with the criteria under each standard. Remodels of, or additions to, designated historic residential structures are subject to the requirements under Chapter 3.5 SDC. The provisions of this section may be adjusted through the design performance option in SDC § 4.2.510.
C. 
Pedestrian Orientation. The design of all buildings on a site shall support a safe and attractive pedestrian environment. This standard is met when the approval body finds that all of the criteria in subsections (C)(1) through (8) of this section are met. Alternatively, the approval body may approve an alternate design under SDC § 4.2.510 through a Type III procedure upon finding that the proposed design equally or better achieves the above standard.
1. 
The building orientation standards under SDC § 2.3.150 are met;
2. 
Primary building entrances shall open directly to the outside and, if not abutting a street, shall have walkways connecting them to the street sidewalk; every building shall have at least one primary entrance that does not require passage through a parking lot or garage to gain access;
3. 
Corner buildings (i.e., buildings within 20 feet of a corner as defined by the intersecting curbs) shall have corner entrances, or shall provide at least one entrance within 20 feet of the street corner or corner plaza;
4. 
At least 50 percent of a building’s street-facing elevation(s) shall be located at the build-to line or closer to the street; build-to lines are pre-scribed by SDC § 2.3.120;
5. 
Ground floor windows or window displays shall be provided along at least 50 percent of the building’s (ground floor) street-facing elevation(s). Design elements such as large, regularly spaced and similarly shaped windows with window trim, and with transom or clerestory windows above building entrances, are counted; windows and display boxes shall be integral to the building design and not mounted to an exterior wall;
6. 
Windows shall cover no more than 90 percent of the ground floor facade length, and shall not begin less than 18 inches or more than 30 inches above the walkway (except transom windows). Second and third story windows shall match the vertical and horizontal character of ground level windows;
7. 
Street-facing elevations shall be designed with weather protection, such as awnings, canopies, overhangs, or similar features. Such weather protection shall project a minimum of four feet and a maximum of eight feet over sidewalks or other pedestrian space.
a. 
Awnings shall be flat or sloping with a maximum slope of 1.5:1. Awnings shall be made of metal, wood, canvas or similar materials. Rounded bubble or plastic awnings are prohibited unless the plastic is rigid sheet.
b. 
Awnings shall not be internally illuminated. However, lighting which is intended to provide illumination to the walkway and signage is permitted provided the awning material is opaque;
8. 
Drive-up and drive-through facilities, when allowed, shall conform to SDC § 2.3.160.
D. 
Compatibility. All new buildings and major remodels shall be designed consistent with the architectural context in which they are located. This standard is met when the approval body finds that all of the criteria in subsections (D)(1) through (7) of this section are met. Alternatively, the applicant may propose different design elements as provided under SDC § 4.2.510, Design review – Adjustments (performance option).
1. 
There is continuity or effective transitions in building sizes between new and existing buildings;
2. 
A standardized prototype or franchise design and color scheme shall be modified if necessary to meet the provisions of this section;
3. 
The ground floor and upper floor elevations and architectural detailing are compatible with adjacent commercial buildings;
4. 
Roof Pitch, Materials and Parapets.
a. 
Pitched (gabled or hipped) roofs are required to have minimum pitch of 4:12. Pitched roof surfaces visible from an abutting public street shall provide a secondary roof detail every 30 feet (minimum two), such as a dormer, decorative brackets, exposed beams, etc. Visible roof materials must be wood shingle or architectural grade composition shingle, slate, vinyl, or concrete tile. Metal with standing or batten seam may also be used conforming to the Silverton color palette.
b. 
Parapet roofs shall have steps and detailed coursing shall be provided on those elevations visible from an abutting public street. Parapets shall be varied so that the length of a parapet does not exceed 30 feet without a change in the parapet height of at least two feet or as necessary to hide rooftop equipment (minimum two). A decorative cornice shall be provided along the elevations visible from an abutting street. Parapet corners shall be stepped and the parapet be designed to emphasize the center or primary entrance(s), unless the primary entrance is at the corner of the building. Decorative cornices in excess of three feet tall that include plane separation and color variation may be provided in lieu of the change in parapet height.
c. 
Mansard roofs and barrel roofs are generally not permitted as the primary roof type, unless approved by the planning commission through SDC § 4.2.510.
d. 
Back-lit or internally illuminated roofs are prohibited;
5. 
There is continuity in the rhythm of windows and doors on the proposed building(s);
6. 
The relationship of buildings to public spaces, such as streets, plazas, other areas, and public parking, including on-street parking, is strengthened by the proposed building(s);
7. 
Materials, Color and Design.
a. 
Preferred Building Materials. Building exteriors shall be constructed from high quality, durable materials. Preferred exterior building materials that reflect the city’s desired traditional character are as follows:
i. 
Brick or better.
ii. 
Basalt stone or basalt veneer.
iii. 
Narrow horizontal wood or composite siding (generally five inches wide or less); wider siding will be considered where there is a historic precedent.
iv. 
Other materials subject to approval by the community development director.
b. 
Prohibited Materials. The following materials shall be prohibited in visible locations unless an exception is granted by the planning commission through the design review performance option in SDC § 4.2.510:
i. 
Vinyl or plywood siding (including T-111 or similar plywood).
ii. 
Glass block or highly tinted, reflected, translucent or mirrored glass (except stained glass) as more than 10 percent of the building facade.
iii. 
Poured tilt up concrete.
iv. 
Corrugated fiberglass.
v. 
Chain link fencing (except for temporary purposes such as a construction site or as a gate for a refuse enclosure).
vi. 
Crushed colored rock/crushed tumbled glass.
vii. 
Noncorrugated and highly reflective sheet metal.
c. 
Special Material Standards. The following materials are allowed if they comply with the requirements found below:
i. 
Concrete Block. When used for the front facade of any building, concrete blocks shall be split, rock- or ground-faced and shall not be the prominent material of the elevation. Plain concrete block or plain concrete may be used as foundation material if the foundation material is not revealed more than three feet above the finished grade level adjacent to the foundation wall.
ii. 
Metal Siding. Metal siding shall have visible corner moldings and trim and incorporate masonry or other similar durable/permanent material near the ground level (first two feet above ground level).
iii. 
Exterior insulation and finish system (EIFS) and similar troweled finishes shall be trimmed in wood, masonry, or other approved materials and shall be sheltered from extreme weather by roof overhangs or other methods.
iv. 
Board and batten siding, and/or stucco (when trimmed in wood, masonry, or other approved materials and shall be sheltered from extreme weather by roof overhangs or other methods) are allowed as accent materials to account for no more than 40 percent of a facade visible from the street.
d. 
Color. Building exteriors shall comply with the following standards:
i. 
Permitted colors include warm earth tones (tans, browns, reds, grays and greens) conforming to the Silverton color palette.
ii. 
Primary colors, metallic colors and black may be utilized as trim, detail, and accent colors only, not to exceed five percent of the surface area of any elevation. Such colors shall not be used as primary wall colors.
iii. 
Day-glow colors, highly reflective colors, and similar colors are not permitted.
iv. 
A standardized prototype or franchise color scheme shall be modified or muted if necessary to meet the provisions of this section.
e. 
Design Elements. Each building shall incorporate at least four of the following elements listed below:
i. 
Canopies, porticos or pergolas;
ii. 
Overhangs;
iii. 
Recesses/projections;
iv. 
Raised corniced parapets over the door;
v. 
Outdoor patios;
vi. 
Window shutters;
vii. 
Transom windows;
viii. 
Corner detailing;
ix. 
Architectural details such as tile work, moldings, trellises, or lighting which are integrated into the building structure and design;
x. 
Integral planters or wing walls that incorporate landscaped areas and/or places for sitting;
xi. 
Cobbled, patterned or paved stone or enhanced concrete;
xii. 
Planter boxes and street furniture placed in the right-of-way shall be approved for use according to materials, scale and type.
E. 
Human Scale. The design of all buildings shall be to a human scale. This standard is met when the approval body finds that all of the criteria in subsections (E)(1) through (8) of this section are met. Alternatively, the applicant may propose different design elements as provided under SDC § 4.2.510, Design review – Adjustments (performance option). Figure 2.3.180.E contrasts examples of building elevations that are consistent/inconsistent with human scale criteria.
1. 
Regularly spaced and similarly shaped windows are provided on all building stories;
2. 
Ground floor retail spaces have tall ceilings (i.e., 12 to 16 feet) with display windows on the ground floor;
3. 
Display windows are trimmed, recessed, or otherwise defined by wainscoting, sills, water tables, or similar architectural features;
4. 
On multi-story buildings, ground floors are defined and separated from upper stories by appropriate architectural features (e.g., cornices, trim, awnings, canopies, arbors, trellises, overhangs, or other features) that visually identify the transition from ground floor to upper story; such features should be compatible with the surrounding architecture;
5. 
The tops of flat roofs are treated with appropriate detailing (i.e., cornice, pediment, flashing, trim, or other detailing) that is compatible with the surrounding architecture;
6. 
Pitched roofs have eaves, brackets, gables with decorative vents, or other detailing that is consistent with the surrounding architecture;
7. 
Historic design and compatibility requirements under Chapter 3.5 SDC, where applicable, are met; and
8. 
Where buildings with greater than 10,000 square feet of enclosed ground-floor space are proposed, they shall provide articulated facades on all street-facing elevations. This criterion is met when there is a major break in the building plane not less than once for every 30 feet of a building’s horizontal length. Breaks in the building plane include windows, primary entrances, weather protection (awnings, canopies, arbors, arcades), offsets/projections/changes in elevation or horizontal direction, sheltering roofs, terraces, a distinct pattern of divisions in surface materials, ornamentation, screening trees, small-scale lighting (e.g., wall-mounted lighting or up-lighting), and/or similar features as generally shown in Figure 2.3.180.E. See also subsection (C) of this section.
9. 
Utility equipment within landscaped areas or attached to structures shall be screened from view from public rights-of-way.
Figure 2.3.180.E – Design Elements on Large Commercial Buildings in GC District
Silverton Color Palette, Taken from Benjamin Moore Historic Colors. Proposed paint colors are required to match colors on the approved palette but do not need to be Benjamin Moore brand. The director will review all proposed exterior paint colors to ensure compliance with the approved palette.
Silverton Color Palette, Taken from Valspar Historic Colors. Proposed paint colors are required to match colors on the approved palette but do not need to be Valspar brand. The director will review all proposed exterior paint colors to ensure compliance with the approved palette.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 16-05 § 1, 2016)

§ 2.3.190 (Reserved)

(Ord. 08-06 § 3, 2008)

§ 2.3.200 Downtown commercial district design standards.

A. 
Purpose. This section promotes the historic storefront nature of the downtown commercial area. Design is important to identifying Silverton as a unique place with successful commercial areas. The design standards are intended to:
1. 
Encourage architecture that is consistent with the historic character of downtown Silverton.
2. 
Ensure that new development creates a close, intimate human scale and architectural designs address all four sides of a building.
3. 
Encourage the use of contextually appropriate materials, textures and colors.
4. 
Promote public access by orienting buildings and their entrances to the street or to civic spaces abutting the street.
B. 
Applicability. The following standards are applied through design review prior to building permit review. An applicant is required to demonstrate compliance with all applicable district standards, design review criteria and historic review criteria, if applicable. Remodels of, additions to, or modifications of structures within the National Register Historic District boundary are also subject to the requirements under Chapter 3.5 SDC. The provisions of this section may be adjusted through the design performance option in SDC § 4.2.510 through a Type III procedure.
C. 
Area Defined. The downtown commercial area comprises the central business district and all of the national historical district, and some contiguous areas which are not within the national historical district. See Figure 2.3.200.C.
Figure 2.3.200.C – Map of Downtown Commercial Area
D. 
Standards. Standards for new construction shall require builders to conform to the architectural form of Silverton’s historic period (1890s through 1940s). As such, new construction shall conform to the following standards listed below. Throughout the standards, reference is made to Silverton’s historic period, the 1890s through 1940s, and to buildings which display characteristics of that period. The following list of buildings is provided as a reference guide to those buildings which display characteristics intended by the standards. The list is a guide only – other buildings may be used to demonstrate the required elements and/or the basis for visual compatibility.
Examples of historic storefront buildings for determining compatibility with standards:
1. 
Wolfe Building: 201 E Main St.;
2. 
Silver Falls Bank: 217 E Main St.;
3. 
Larsen and Flynn Building: 100 S Water St.;
4. 
Silver Grill: 206 E Main St.;
5. 
Hartman Building: 210 S Water St.;
6. 
Silverton Masonic Building: 101 – 110 S Water St.
E. 
Site Development.
1. 
Building fronts and entrances shall be oriented toward the street.
2. 
Building facades shall be set at the property edge along the sidewalk. A setback of up to five feet is permitted when occupied by pedestrian amenities (e.g., plaza, outdoor seating).
3. 
Buildings shall promote public viewing of the creek by the construction of decks or balconies adjacent to Silver Creek. This shall include a continuation of a deck or walk within a public access easement. The deck/creek walk shall be a minimum of five feet in width.
F. 
Building Scale.
1. 
The overall size and proportion of new structures shall be compatible with the scale of buildings constructed during the historic period (1890s through 1940s). This standard may be met by either designing the building’s size and proportions to be similar to comparable historic structures in the downtown, or by the design of the facade so that it breaks a larger mass into smaller proportions that are similar to comparable historic structures.
2. 
The relationship between the height and width of the main facade of the building shall be visibly compatible with adjoining or nearby buildings of the historic period or style. As with subsection (F)(1) of this section, this standard may be met through either similar height and width, or, through design elements that provide visual continuity with the height and width of adjoining or nearby buildings of the historic period.
G. 
Building Height.
1. 
The facade height of all buildings shall be two to four stories and not more than 55 feet in maximum height.
H. 
Building Width.
1. 
All new buildings shall maximize lot frontage as much as is practicable.
2. 
New buildings whose street frontage is more than 45 feet wide shall be designed to convey a sense of division through the use of pilasters, windows and door openings, recessed entries, off-sets or other architectural details.
I. 
Storefronts.
1. 
Primary entrances shall be oriented to the street. Corner buildings shall have corner entrances, or shall provide at least one entrance within 20 feet of the street corner or corner plaza.
2. 
The upper windows of multi-story buildings shall use multi-pane double-hung sash windows or the equivalent style.
3. 
The relationship between solid walls and window and door openings on the main facade shall be visually compatible with adjoining or nearby structures from the historic period or style.
4. 
The relationship of width and height of window and door openings shall be visually compatible with adjoining or nearby buildings from the historic period or style.
5. 
Blank walls, walls without window or door openings, are not permitted along public streets.
6. 
Windows and doorways shall not be covered over with paper, boards, or cardboard except during times of construction or remodeling and shall be limited to a period of 120 days unless an extension is otherwise granted by the city manager.
7. 
Doors shall match the materials, design, and character of the display window framing.
8. 
Architectural features such as awnings, windows, cornices, etc., shall be provided at the second floor to differentiate the storefront from the upper levels of the building, to add visual interest, and to allow the storefront to function as the base for the rest of the building.
9. 
Utility equipment within landscaped areas or attached to structures shall be screened from view from public rights-of-way.
J. 
Facade Materials and Texture.
1. 
The materials and texture of the facade shall be compatible with those on buildings constructed during the historic period.
2. 
Permitted exterior facade materials include: brick, cast iron, relatively narrow horizontal wood siding, and stucco. Plywood siding, T-111, and vertical board and batten are prohibited.
3. 
Exposed concrete block facades facing the street are not allowed. Split-face or scored-face block may be used in small quantities for foundations or other nondominant features.
4. 
All main facade materials shall be painted (except brick, for which painting is optional).
5. 
Metal siding shall not be used as a building material on the facade facing a street.
K. 
Roofs.
1. 
Main facade roofs (lower than a 6:12 pitch) shall be concealed behind a square or stepped parapet.
2. 
All HVAC systems located on top of a roof shall be located and/or screened so that they are not visible from the street. Dish-style antennas shall be located and/or screened so that they are not visible from the street. All screening material shall be natural and shall be compatible with the facade of the front of the building.
3. 
New roofs on existing buildings, or on additions to existing buildings, shall match the pitch and form of the original roof.
4. 
Shed roofs are permitted on one-story rear additions.
5. 
Back-lit or internally illuminated roofs are prohibited.
L. 
Awnings and Canopies.
1. 
Awnings shall extend out from the building front to cover at least two-thirds of the sidewalk unless it is shown that such a distance will interfere with existing trees, poles, etc., to provide pedestrian protection from the elements.
2. 
Awnings shall be flat or sloping. Awnings shall be made of metal, wood, canvas or similar materials. Rounded bubble or plastic awnings are prohibited. Fully glazed awnings are not permitted.
3. 
Awnings shall fit within the window bays (either above the main glass or the transom light) so as not to obscure or distract from significant architectural features.
4. 
The color of the awning shall be compatible with its attached building.
5. 
Awnings shall not be internally illuminated. However, lighting which is intended to provide illumination to the sidewalk and signage is permitted.
6. 
Awnings shall be a minimum of eight feet above the sidewalk.
M. 
Color.
1. 
The painting of brick walls is permitted.
2. 
Subtle or subdued tones commonly used during the historic period shall be used. Bright or neon colors are prohibited.
3. 
Different colors shall be used to accentuate and highlight trim, windows, and other building features.
N. 
Signs/Murals. Refer to Silverton sign code, Chapter 15.16 SMC, for specific sign regulations. In the DC and DCF districts:
1. 
Murals are allowed on the side walls of buildings facing the interior of blocks and blank side walls of nonhistoric buildings.
2. 
Murals are not permitted on the main facades of either modern or historic buildings.
3. 
Existing murals shall not be altered without a conditional use.
O. 
Site Design.
1. 
Landscaping shall not obliterate street and sidewalk views of signage or architectural features on historic buildings.
2. 
The area of downtown bounded north and south between High Street and Lewis Street and bounded east and west by Water Street and First Street shall provide alternative landscape features in lieu of street trees to include one of the following for every 30 feet of frontage: plazas, planter boxes, hanging baskets, decorative sidewalk treatments or benches.
3. 
For those areas not included in subsection (O)(2) of this section there shall be one street tree for every 30 to 50 feet of frontage, depending on the crown width of the tree, chosen from the street tree list, permitted on that portion of the development paralleling the street, unless it is determined that street trees will interfere with ingress/egress, utility lines or other factors would prevent a tree from growing to healthy maturity. Tree species and size are to be consistent with the approved city of Silverton street tree list.
4. 
Container plants shall be provided if the property cannot provide any other form of landscaping. Otherwise, low-water deciduous trees, shrubs, and flowering plants shall be used.
P. 
Designated Creek Protection.
1. 
Creek protection to maintain water quality and wild animal habitat shall be incorporated in the overall design of a project.
2. 
Native riparian plant materials shall be planted adjacent to the creek to enhance creek habitat, consistent with state and federal guidelines.
Q. 
Parking.
1. 
Parking areas shall not be located between the front of the building and the street.
2. 
Parking areas with more than 10 spaces shall be divided by landscaped areas or walkways, or by a building or group of buildings.
3. 
Parking lot landscaping shall consist of a minimum of 10 percent of the total parking area. The landscaping in parking areas is in addition to that required to meet other standards or percentages of required landscaping. A minimum of one tree for every 10 parking spaces shall be provided.
4. 
“Knee walls” are required to screen street side parking lots. “Knee walls” shall not exceed three feet in height and shall be constructed with masonry. A combination of walls and landscaping may be approved if they provide an effective buffer and low-level screen of the parking area.
5. 
Parking lot orientation shall comply with requirements within SDC § 2.3.150.
R. 
Residential Development.
1. 
Development which includes second and third-story residences is compatible with historic design and use patterns and shall be allowed when other standards are met.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.3.210 Downtown commercial fringe district design standards.

A. 
Purpose. This section promotes the historic residential nature of the downtown commercial fringe area. Design is important to identifying Silverton as a unique place with successful commercial areas. The design standards are intended to:
1. 
Encourage architecture that is consistent with the historic residential character of downtown Silverton.
2. 
Ensure that new development creates a close, intimate human scale and architectural designs address all four sides of a building.
3. 
Encourage the use of contextually appropriate materials, textures and colors.
4. 
Promote pedestrian-oriented uses by orienting buildings and their entrances to the street or to civic spaces abutting the street.
5. 
Balance rhythm and continuity – encourage creativity in the design of building elevations, rooflines and facade elements.
B. 
Applicability. The following standards are applied through design review prior to building permit review. The applicant is required to demonstrate that the standards are met by complying with the criteria under each standard. Remodels of, or additions to, designated historic residential structures are subject to the requirements under Chapter 3.5 SDC. The provisions of this section may be adjusted through the design performance option in SDC § 4.2.510.
C. 
Area Defined. The “downtown commercial fringe” includes four subsections that surround the downtown commercial district. See Figure 2.3.210.C.
Figure 2.3.210.C Map of Downtown Commercial Fringe District
D. 
Standards. Standards for new construction shall require builders to conform to the residential form of the historic period (1890s through 1940s) or the surrounding buildings. As such, new construction shall conform to the following standards. The following list of buildings is provided as a reference guide to those buildings which display characteristics intended by the standards. The list is a guide only; other buildings may be used to demonstrate the required elements and/or the basis for visual compatibility.
Examples of historic homes converted to commercial use for determining compatibility with standards:
1. 
Water Street Inn: 421 N Water St.;
2. 
Heron Graphics: 417 N Water St.;
3. 
Medical Data Solutions: 411 N Water St.;
4. 
Patrick Doyle House: 429 N Water St.;
5. 
Adams House: 729 S Water St.
E. 
Site Orientation.
1. 
The primary building facade shall face the street.
2. 
Buildings shall promote public viewing of the creek by the construction of decks or balconies adjacent to Silver Creek. This shall include a continuation of the five-foot-wide creek walk or trail with a public easement.
3. 
The setbacks in the DCF zone are five to 20 feet.
4. 
All sign locations shall be identified and shown on the plan submitted for review. Proposed sign locations and dimensions of signs shall comply with the Silverton sign code, Chapter 15.16 SMC.
F. 
Site Design.
1. 
Landscaping (trees, shrubs, planters, etc.) shall not obliterate street and sidewalk views of signage or architectural features on historic buildings.
2. 
Landscaping shall be continuously maintained by the property owner.
3. 
Existing healthy trees on the site shall be preserved.
4. 
One street tree shall be provided for every 30 to 50 feet of frontage, depending on the crown width of the tree, chosen from the street tree list, which shall be placed on that portion of the development paralleling the street. Where the size of the project dictates an interior street layout, a similar streetscape with street trees is required. Tree species and size are to be consistent with the approved city of Silverton street tree list.
5. 
Low-water-use trees, shrubs, and flowering plants shall be used or an irrigation system shall be installed.
G. 
Building Scale and Height.
1. 
Buildings shall be constructed to a maximum height of 35 feet. Roof style shall be architecturally compatible with the surrounding developments.
H. 
Building Width.
1. 
All new building widths shall be consistent with adjacent properties.
I. 
Roofs.
1. 
Backlit or illuminated roofs are prohibited.
2. 
All HVAC systems located on top of a roof shall be located and/or screened so that they are not visible from the street. Dish style antennas shall be located and/or screened so that they are not visible from the street. All screening material shall be compatible with the facade of the front of the building.
3. 
Roof lines should be visually compatible with the existing historic buildings in the same district. Peaked and pitched roofs are preferred in the DCF district. Refer to subsection (D) of this section for examples of residential historic buildings in the DCF.
J. 
Facade Materials/Textures.
1. 
Generally, the material and texture of the facade shall be compatible with those on buildings constructed during the designated historic period.
2. 
Permitted exterior facade materials include: relatively narrow horizontal wood siding, wood shingles, stucco facing and durable materials such as brick, stone and concrete.
3. 
Exposed concrete block and plywood material are not allowed. Split-face or textured concrete may be used on the facade facing a street.
4. 
All main facade materials shall be painted, except for durable materials such as brick, stone or concrete block which shall be sealed or otherwise appropriately treated.
5. 
Metal shall not be used as a building material on the building facade facing any street. This requirement shall not include certain types of uses such as gas station canopies, historically sensitive awnings or ornamentation.
6. 
Utility equipment within landscaped areas or attached to structures shall be screened from view from public rights-of-way.
K. 
Color.
1. 
Bright primary colors shall be prohibited. Subtle or subdued tones shall be used.
L. 
Parking.
1. 
Parking areas shall not be located between the front of the building and the street.
2. 
Parking lot landscaping shall consist of a minimum of 10 percent of the total parking area. The landscaping in parking areas is in addition to that required to meet other standards or percentages of required landscaping. A minimum of one tree for every 10 parking spaces shall be provided.
3. 
Parking lots shall comply with requirements within Chapter 3.3 SDC.
M. 
Designated Creek Protection.
1. 
Properties which abut Silver Creek shall include creek protection to maintain water quality and wild animal habitat in the overall design of a project.
2. 
Properties which abut Silver Creek shall include native riparian plant materials landscaping to be planted adjacent to the creek to enhance creek habitat.
N. 
Landscaping.
1. 
Landscaping shall be designed so that vegetation covers a minimum of 50 percent of the required landscaped area within one year of installation, and 90 percent coverage occurring within five years.
2. 
Landscaping design shall include a variety of deciduous and evergreen trees and shrubs and flowering plant species well adapted to the local climate.
3. 
During site preparation existing healthy trees shall be saved where practicable.
4. 
Landscaping shall consist of a minimum of 10 percent of the total site.
5. 
All landscaping shall be continuously maintained by the property owner. Failed plantings shall be replaced in the next appropriate planting season, but no later than within one year of the initial planting.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.4.100 Industrial districts – Purpose.

A. 
Industrial District. Provides appropriate locations for intensive industrial uses including heavy industrial uses as well as railroad yards and waste-related activities. Uses include those which involve the use of raw materials, require significant outdoor storage and generate heavy truck and/or rail traffic. Properties are carefully located to minimize impacts on established residential, commercial and light industrial areas.
B. 
Light Industrial District. Provides appropriate locations for general industrial uses, including manufacturing and production, research and development, warehousing and freight movement and wholesale sales activities with few, if any, nuisance characteristics.
C. 
Industrial Park District. Provides appropriate locations for combining light manufacturing, office and small-scale commercial uses (restaurants, personal services and fitness centers) in a campus-like setting.
(Ord. 08-06 § 3, 2008; Ord. 14-01 § 1 (Exh. A), 2014)

§ 2.4.110 Industrial district – Allowed uses.

Table 2.4.110 identifies the land uses that are allowed in the industrial districts. The specific land use categories are described and uses are defined in Chapters 1.5 and 1.6 SDC.
Table 2.4.110
Uses
Status of Use in District
Use Categories
(Examples of uses are in Chapter 1.6 SDC; definitions are in Chapter 1.5 SDC)
Industrial (I)
Light Industrial (LI)
Industrial Park (IP)
Residential Categories
 
 
 
Household Living
 
 
 
Residential uses (household living and group living) not allowed, except as follows:
 
 
 
- Lawfully existing before September 1, 2006, per SDC § 2.3.160(E); or
S
S
S
- Caretaker dwelling (accessory to a primary permitted use)
P
P
P
Group living uses shall conform to the provisions in SDC § 2.2.200
 
 
 
Commercial Categories
 
 
 
Drive-up/drive-in/drive-through (drive-up windows, kiosks, similar uses/facilities)
 
 
 
- Accessory to a primary permitted use
P
CU
CU
- Not accessory to a permitted use
CU
CU
N
Bed and breakfast inn
N
N
N
Educational services, not a school
N
CU
CU
Entertainment, major event
N
N
N
Mobile food vendor, per SDC § 2.3.160(B)
S
S
S
Offices
CU
P
P
Outdoor recreation, commercial
N
N
N
Parking lot, when not an accessory use
CU
CU
CU
Quick vehicle servicing or vehicle repair
CU
CU
CU
Retail sales and service
 
 
 
- Accessory to a primary permitted use
P
P
P
- Not accessory to a primary permitted use, limited to 30,000 square feet gross floor area (SDC § 2.4.140)
N
S
S
Indoor sports facility – no square footage limit
CU
CU
CU
Self-service storage
 
 
 
- Enclosed
P
P
P
- Unenclosed (any portion)
P
CU
N
Industrial Categories
 
 
 
Heavy industrial
P
P
PH
Industrial service
 
 
 
- Fully enclosed (e.g., office)
P
P
P
- Not enclosed
P
CU
N
Manufacturing and production
 
 
 
- Processing of marijuana
CU
CU
CU
- Fully enclosed
P
P
P
- Not enclosed
CU
N
N
Warehouse and freight movement
CU
CU
CU
Waste-related
CU
CU
N
- Composting facilities
CU
CU
CU
Wholesale sales, per SDC § 2.4.140
 
 
 
- Fully enclosed
N
S
S
- Not enclosed
CU
CU+S
CU+S
Institutional Categories
 
 
 
Basic utilities
P
P
P
Renewable energy facilities
 
 
 
- Accessory or primary use
CU+S
CU+S
CU+S
Nonrenewable energy facilities
CU
CU
CU
Colleges, including vocational schools
CU
P
P
Community service
CU
P
P
Daycare, adult or child daycare
N
N
N
Jails and detention facilities
CU
CU
CU
Parks and open space
P
P
P
Religious institutions and houses of worship
 
 
 
- Lawfully existing as of November 5, 2008
P
P
P
- New facilities
N
N
N
- Transitional shelter communities, per the standards in SDC § 2.2.200(N)
CU
CU
CU
Schools
 
 
 
- 20 or fewer students
N
P
P
- More than 20 students
N
CU
CU
Funeral services
P
P
P
Cemeteries, mausoleums, and crematoriums
CU
CU
CU
Other Categories
 
 
 
Accessory structures (with a primary use)
P
P
P
Agriculture – Animals
N
N
N
Agriculture – Nurseries and similar horticulture (see also wholesale and retail uses)
P
CU
CU
Agriculture – Marijuana producers and grow sites enclosed, per SDC § 2.4.160(B)
CU
CU
CU
Agriculture – Marijuana producers and grow sites nonenclosed, per SDC § 2.4.160(B)
N
N
N
Mining
N
N
N
Radio frequency transmission facilities
 
 
 
- Within height limit of district
P
P
P
- Exceeds height limit (free-standing or building-mounted facilities)
CU
CU
CU
Rail lines and utility corridors
CU
CU
CU
Temporary uses (limited to “P” and “CU” uses), per SDC § 4.9.100
P/CU
P/CU
P/CU
Transportation facilities (operation, maintenance, preservation, and construction in accordance with the city’s transportation system plan)
P
P
P
Key:
P = Permitted, subject to land use review or design review (Chapter 4.2 SDC)
PH = Permitted, subject to design review conducted by the planning commission in a public hearing
S = Permitted with standards (SDC §§ 2.4.140 and/or 2.4.160). Standards may be modified with a planned development
CU = Conditional use required (Chapter 4.4 SDC)
N = Not permitted
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 16-01 § 5, 2016; Ord. 18-22 § 5, 2018)

§ 2.4.120 Industrial districts – Setback yards and buffering.

A. 
Purpose. Setback yards and buffers provide separation between industrial and nonindustrial uses for fire protection/security, building maintenance, sunlight and air circulation, noise buffering, and visual separation.
B. 
Applicability. The setback yard and buffer standards in subsections (C) through (F) of this section are minimum standards that apply to buildings, accessory structures, parking areas, mechanical equipment, and other development (but not buffers as required under subsection (F) of this section). In granting a conditional use, the approval body may increase the standard yards and/or buffers consistent with the criteria in Chapter 4.4 SDC. The approval body may also decrease the standard yards and/or buffers through the CU process; provided, that all applicable building and fire safety codes are met.
C. 
Front and Street Yard Setbacks.
1. 
Industrial (I) District: Minimum of 20 feet.
2. 
Light Industrial (LI) District: Minimum of 10 feet.
3. 
Industrial Park (IP) District: Minimum of 10 feet.
D. 
Rear Yard Setbacks. A minimum of 10 feet is required, except where common wall buildings with zero setback are allowed through design review (fire codes must be met); and where abutting a residential district, a minimum of 30 feet is required.
E. 
Side Yard Setbacks. There are no required side yard setbacks, except a minimum of 30 feet is required when an industrial district (I or LI) abuts a residential district.
F. 
Buffering – Other Yard Requirements.
1. 
Buffering. The approval body may require landscaping, fences, walls or other buffering that exceeds the landscaping standards in Chapter 3.2 SDC when it finds through design review (Chapter 4.2 SDC), conditional use review (Chapter 4.4 SDC), and/or planned development review (Chapter 4.5 SDC), as applicable, that more or different buffering is necessary to mitigate adverse noise, light, glare, and/or aesthetic impacts to adjacent properties.
2. 
Pedestrian Access. The approval body may require the construction of pedestrian access ways through required buffers to ensure pedestrian connections within large developments, between multiple development phases, or connecting to public sidewalks, walkways, or multi-use pathways. Access way design shall conform to SDC § 3.1.300.
(Ord. 08-06 § 3, 2008)

§ 2.4.130 Industrial districts – Lot coverage.

A. 
Industrial (I) District. Maximum lot coverage, 90 percent; maximum area of impervious surfaces, 90 percent.
B. 
Light Industrial (LI) District. Maximum lot coverage, 85 percent; maximum area of impervious surfaces, 85 percent.
C. 
Industrial Park (IP) District. Maximum lot coverage, 85 percent; maximum area of impervious surfaces, 85 percent.
(Ord. 08-06 § 3, 2008)

§ 2.4.140 Industrial districts – Site layout and design.

A. 
Development Compatibility. Industrial uses and developments shall be oriented on the site to minimize adverse impacts (e.g., noise, glare, smoke, dust, exhaust, vibration, etc.) and to provide compatibility with adjacent uses to the extent practicable. The following standards shall apply to all development in the industrial districts:
1. 
Mechanical equipment, lights, emissions, shipping/receiving areas, and other components of an industrial use that are outside enclosed buildings shall be located away from residential areas, schools, parks and other nonindustrial areas to the maximum extent practicable; and
2. 
The city may require a landscape buffer, or other visual or sound barrier (fence, wall, landscaping, or combination thereof), to mitigate adverse impacts that cannot be avoided, as provided in SDC § 2.4.120.
B. 
Large-Scale Commercial Development. Where a commercial, retail or wholesale use is allowed (LI or IP districts), it shall meet the following standards:
1. 
Gross floor area used for commercial, retail or wholesale shall be limited to 30,000 square feet;
2. 
The architectural standards in SDC § 2.3.180 must be met on the subject commercial, retail or wholesale building(s), as applicable; and
3. 
Developments containing more than one building, including commercial or industrial subdivisions containing outlying commercial pads, shall meet the commercial block layout and building orientation standards for the general commercial district contained in Chapter 2.3 SDC, Commercial Districts.
C. 
Landscape Area.
1. 
Industrial (I) District. Minimum area: 10 percent.
2. 
Light Industrial (LI) District. Minimum area: 15 percent.
3. 
Industrial Park (IP) District. Minimum area: 15 percent.
(Ord. 08-06 § 3, 2008)

§ 2.4.150 Industrial districts – Building and structure height.

A. 
Height. The maximum allowable height of buildings and structures in the industrial districts is 45 feet, except that taller buildings and structures are allowed when approved as part of a conditional use, provided the minimum setback for such structures abutting a residential district shall be increased by one foot for every foot of structure height exceeding 45 feet.
B. 
Design Standards.
1. 
Building frontages shall have offsets, jogs, or other distinctive changes in the texture, color and size of the facade.
2. 
Metal shall not be the predominant building material on the facade facing a street.
(Ord. 08-06 § 3, 2008)

§ 2.4.160 Special use standards.

A. 
Renewable Energy Facilities. Where renewable energy facilities are allowed, they shall require approval through conditional use review (Type III) and conform to all of the following standards:
1. 
Primary or Accessory Use. The use may be primary or accessory to an allowed use within I, LI, or IP districts.
2. 
Maximum Height and Setback. Renewable energy facilities structures built according to the International Building Code shall meet the maximum height and setback standards of SDC § 2.4.150(A).
3. 
Performance Standards. Renewable energy facilities shall not exceed the performance standards stated by SDC § 2.4.170(C).
4. 
Landscaping. Screening and buffering for the facilities within IP, LI and I districts shall follow the standards of SDC § 3.2.300.
5. 
Other Permit or Licensing Requirements. The owner of the facility shall be responsible for obtaining and complying with all other applicable permit and/or licensing requirements.
B. 
Agriculture – Marijuana Producers and Grow Sites. Where marijuana produces and grow sites are allowed, they shall require approval through the conditional use process and conform to all of the following standards:
1. 
For the purposes of this section, “enclosed” means within a building, which is defined as a permanent rigid fabrication or construction, attached or affixed to land with a permanent foundation, consisting of walls, columns, girders, beams, floors, and a roof, or some combination of these elemental parts, that is enclosed on all sides, that is intended as a habitation or shelter for people or animals or a shelter for tangible personal property, and that has structural integrity independent of the tangible personal property, if any, it is designed to shelter. Greenhouses constructed out of rigid material, or greenhouses constructed out of flexible material, are not considered enclosed.
2. 
Marijuana producers, processors, and wholesalers shall not be located within 1,000 feet of a public elementary or secondary school for which attendance is compulsory under ORS 339.020; or a private or parochial elementary or secondary school, teaching children as described in ORS 339.030. “Within 1,000 feet” means a straight line measurement in a radius extending for 1,000 feet or less in any direction from the closest point anywhere on the boundary line of the real property comprising a school to the closest point of the licensed premises of a producer, processor, and/or wholesaler. “Premises” has the definition described in OAR 845-025-1015.
(Ord. 10-02 Exh. A § B, 2010; Ord. 16-01 § 5, 2016)

§ 2.4.170 Industrial districts – Performance standards.

A. 
Purpose. The following performance standards apply to all industrially zoned properties, and are intended to minimize the potential adverse impacts of industrial activities on the general public and on other land uses or activities. They are not intended to prevent conflicts between different uses or activities that may occur on the same property.
B. 
Confined Operations. All uses and operations except storage, off-street parking, loading and unloading, including the transfer of materials from outdoor storage to a building, shall be confined, contained, and conducted wholly within completely enclosed buildings, unless outdoor activities have been approved as part of a conditional use approval.
C. 
Vibration. Every use shall be so operated that the ground vibration inherently and recurrently generated from equipment other than vehicles is not perceptible without instruments at any boundary line of the property on which the use is located.
D. 
Odors. Emission of offensive odorous gases or other offensive odorous matter, to a reasonable person of normal sensitivities, in quantities as detectable at any point on any boundary line of the property on which the use is located shall be prohibited.
E. 
Heat and Glare. Uses and operations shall meet the following standards:
1. 
Operations producing heat or glare shall be conducted entirely within an enclosed building.
2. 
Exterior lighting on private property shall be screened, baffled, or directed away from adjacent residential properties. This is not intended to apply to street lighting.
F. 
Dangerous Substances. Any use which involves the presence, storage or handling of any explosive or nuclear waste product in a manner which would cause a health or safety hazard for any adjacent land use or site shall be prohibited.
G. 
Liquid and Solid Wastes. Uses and operations shall meet the following standards:
1. 
Any storage of wastes which attracts insects or rodents or otherwise creates a health hazard shall be abated as a nuisance.
2. 
Waste products which are stored outside shall be concealed from view from any property line by a sight-obscuring fence or planting as required in Chapter 3.2 SDC.
3. 
No connection with any public sewer shall be made or maintained in violation of applicable city or state standards.
4. 
No wastes conveyed shall be allowed to or permitted, caused to enter, or allowed to flow into any public sewer in violation of applicable city or state standards.
5. 
All drainage permitted to discharge into a street gutter, caused to enter or allowed to flow into any pond, lake, stream, or other natural water course shall be limited to surface waters or waters having similar characteristics as determined by the city, county, and State Department of Environmental Quality.
6. 
All operations shall be conducted in conformance with the city’s standards and ordinances applying to sanitary and storm sewer discharges.
H. 
Noise. No noise or sound in an industrial district shall be of a nature which will constitute a nuisance and shall not exceed the limits permitted under OAR 340-035-0005. Noise made by devices which are maintained and utilized solely to serve as warning devices is excluded from these regulations. Noise created by highway vehicles, trains, watercraft, and aircraft is also excluded from these regulations.
I. 
Electrical Disturbances. Except for electrical facilities wherein the city is preempted by other governmental entities, electrical disturbances generated by uses within the industrial zones which interfere with the normal operation of equipment or instruments within the industrial zones are prohibited. Electrical disturbances which routinely cause interference with normal activity in abutting residential use areas are also prohibited.
J. 
Discharge Standards. There shall be no emission of smoke, fallout, fly ash, dust, vapor, gases, or other forms of air pollution that may cause injury to human, plant, or animal life, or to property. Plans of construction and operation shall be subject to the recommendations and regulations of the State Department of Environmental Quality. All measurements of air pollution shall be by the procedures and with equipment approved by the State Department of Environmental Quality or equivalent and acceptable methods of measurement approved by the city. Persons responsible for a suspected source of air pollution upon the request of the city shall provide quantitative and qualitative information regarding the discharge that will adequately and accurately describe operation conditions.
K. 
Open Burning. This activity shall be prohibited.
L. 
Storage. Uses and operations shall meet the following standards:
1. 
Outdoor storage area shall be gravel surface or better and shall be suitable for the materials being handled and stored. If a gravel surface is not sufficient to meet the performance standards for the use, the area shall be suitably paved.
2. 
Any open storage that would otherwise be visible at the property line shall be concealed from view at the abutting property line by a sight-obscuring fence or planting not less than six feet in height.
M. 
Landscaping. Uses and operations shall meet the following standards:
1. 
Landscaping for unused property disturbed during construction shall include such things as plantings of ornamental shrubs, lawns, native plants, and mowed, seeded field grass.
2. 
Unused areas of undisturbed field grass may be maintained in their existing state. Stands of invasive weeds shall meet the noxious vegetation standards of SMC § 8.04.050. These unused areas, located within a phased development project or a future expansion, cannot be included in the area calculated to meet the landscape requirements for the initial phase(s) of the development.
3. 
Unused property shall not be left with disturbed soils that are subject to siltation and erosion. Any disturbed soil shall be seeded for complete erosion cover germination and shall be subject to applicable erosion control standards.
(Ord. 08-06 § 3, 2008. Formerly 2.4.160; Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014)

§ 2.5.100 Purpose.

It is the purpose of these regulations to promote the public health, safety and general welfare, and to minimize public and private losses due to flood conditions in specific areas.
(Ord. 08-06 § 3, 2008)

§ 2.5.110 Development to which these regulations apply.

“Development,”
as defined in Chapter 1.5 SDC, includes, but is not limited to, residential and nonresidential construction, manufactured housing, and land divisions. Excavation and fill (grading) is specifically excluded from the definition of development as used in this section. Grading is regulated by SDC § 2.6.180.
(Ord. 08-06 § 3, 2008)

§ 2.5.120 Lands to which these regulations apply.

These regulations shall apply to all areas within the city of Silverton that are subject to inundation from a 100-year flood. These areas are depicted on federal flood insurance rate maps (FIRMs) and floodway maps by the letters A, AE, or AO.
These areas have been identified by the Federal Emergency Management Agency (FEMA) in the flood insurance study for Marion County dated January 19, 2000 (Panels 243, 244, 382, and 400 of 1150). In addition, the city council may adopt by resolution more current studies or boundary information approved by the Federal Emergency Management Agency (FEMA).
Precise floodplain district boundaries may be difficult to determine from the maps referred to above due to their large scale and lack of site-specific studies. In such instances, the community development director may apply FEMA base flood elevations to topographic maps or site surveys in order to determine actual boundaries. In the absence of FEMA base flood elevations, the director shall reasonably utilize other sources of floodplain and floodway data to determine base flood elevations and boundaries. However, when elevation data is not available through FEMA or another authoritative source and the development consists of four or more lots, four or more structures, or four or more acres, the applicant shall generate and have certified by a registered engineer the base flood elevation. Any decision of the community development director regarding a determination of a base flood elevation or interpretation of a district boundary may be appealed in accordance with Chapter 4.8 SDC.
The flood insurance study and FIRM panels for the city of Silverton are maintained in the community development office. The community development office also maintains for public inspection all records pertaining to the provisions of this title, including elevation and flood-proofing certificates.
(Ord. 08-06 § 3, 2008)

§ 2.5.130 Floodplain variances.

Variances from the terms of this chapter shall be granted only when, because of special circumstances applicable to the property including size, shape, topography, location or surroundings, the strict application of this section deprives such property of privileges enjoyed by other property in vicinity and under identical zoning classifications. There will be no variance given to the standards for development in the floodway. Variances from the floodplain management regulations of this chapter shall be reviewed as a Type II procedure and shall be approved if the review body finds that all of the following criteria have been met:
A. 
The applicant can show good and sufficient cause; and
B. 
Failure to grant the variance would result in exceptional, nonfinancial hardship to the applicant; and
C. 
Issuance of the variance will not result in increased flood heights, additional threats to public safety, extraordinary public expense, create nuisances, cause fraud on or victimization of the public, or conflict with existing local laws or ordinances; and
D. 
The variance is the minimum necessary, considering the flood hazard, to afford relief; and in addition, variances from the required lowest floor elevation may be granted if the review body finds that the request meets the following criterion as well as those criteria listed above:
1. 
The parcel is one-half acre or less in size contiguous to and surrounded by lots with existing structures constructed below the base flood level.
Upon issuance of the variance, the community development director will notify the applicant in writing that the issuance of a variance to construct a structure below the base flood level will result in increased premium rates for flood insurance, and such construction below the base flood level increases risks to life and property.
(Ord. 08-06 § 3, 2008)

§ 2.5.140 Definitions.

As used in this chapter the following words and phrases shall have the following meanings:
“Base flood” or “100-year flood”
means the flood having a one percent chance of being equaled or exceeded in any given year. Map designation always includes the letter “A” (e.g., A, AE, AO).
“Federal Emergency Management Agency (FEMA)”
means the federal agency charged with implementing the National Flood Insurance Program. FEMA provides floodplain maps to the city of Silverton.
“Flood”
means a general and temporary condition of partial or complete inundation of normally dry land areas from:
1. 
The overflow of inland or tidal waters; and/or
2. 
The unusual and rapid accumulation of runoff of surface waters from any source.
“Flood fringe”
means those areas outside the floodway but within the 100-year floodplain. Zone designations on flood insurance rate maps include A, AE, and AO. Note floodway relationships diagram Figure 6-3 at the end of this section.
“Flood insurance rate map (FIRM)”
means the official map on which FEMA has delineated both the areas of special flood hazards and the insurance risk premium zones.
“Floodplain”
means the combined area of the floodway and the flood fringe.
“Floodproofing”
means any combination of structural or nonstructural provisions, changes or adjustments to structures, land or waterway for the reduction or elimination of flood damage to real estate or improved real property, water and sanitary facilities, structures, and their contents during a 100-year flood.
“Floodway”
means the channel of a river or other watercourse and the adjacent land areas that must be reserved in order to discharge the base flood without increasing the water surface elevation more than one foot. These areas are identified on the floodway maps issued by FEMA. Note floodway relationships diagram in Figure 6-3 at the end of this section.
“Lowest floor”
means the lowest floor of the lowest enclosed habitable area (including basement). An unfinished or flood-resistant enclosure, usable solely for parking vehicles, building access or storage, in any area other than a basement area, is not considered a building’s lowest floor; provided, that such enclosure is not built so as to render the structure in violation of the applicable design requirements of this title found in SDC § 2.5.210.
“Permanent foundation”
means a natural or manufactured support system to which a structure is anchored or attached. A permanent foundation is capable of resisting flood forces and may include posts, piles, poured concrete or reinforced block walls, properly compacted fill, or other systems of comparable flood resistance and strength.
“Special flood hazard area”
means areas subject to inundation during the occurrence of the 100-year flood.
“Substantial damage”
means damage of any origin sustained by a structure whereby the cost of restoring the structure to its before-damaged condition would equal or exceed 50 percent of the market value of the structure before the damage occurred.
“Substantial improvement”
means, for the purposes of this section, and notwithstanding the provisions for nonconforming uses and development pursuant to Chapter 5.2 SDC, any repair, reconstruction, or improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure before the start of construction of the improvement. This term includes structures which have incurred “substantial damage,” regardless of the actual repair work performed. The term does not, however, include either:
1. 
Any project for improvement of a structure to correct existing violations of state or local health, sanitary, or safety code specifications which have been identified by the local code enforcement official and which are the minimum necessary to assure safe living conditions; or
2. 
Any alteration of a structure identified on the city’s adopted historic inventory; provided, that the alteration will not preclude the structure’s continued designation as a historic structure.
“Watercourse”
means any natural or artificial stream, river, creek, ditch, channel, canal, conduit, culvert, drain, waterway, gully, ravine or wash in which water flows in a definite direction or course, either continuously or intermittently, and has a definite channel, bed and banks, and includes any area adjacent thereto subject to inundation by reason of overflow or flood water.
(Ord. 08-06 § 3, 2008)

§ 2.5.150 State and federal approval.

City approval of any development within the floodplain is conditioned upon receipt of any required state or federal permits. Required state and federal permits include but are not limited to:
A. 
Permits and associated wetland development regulations administered by the Oregon Department of State Lands.
B. 
Permits administered by the U.S. Army Corps of Engineers.
C. 
All discharge permits covered by the U.S. Environmental Protection Agency and Oregon Department of Environmental Quality.
(Ord. 08-06 § 3, 2008)

§ 2.5.160 Floodway restrictions.

No development is allowed in any floodway except where the review body finds that the development will not result in any increase in flood levels during the occurrence of the 100-year flood. Such finding shall be based upon applicant-supplied evidence certified by a registered professional engineer and upon documentation that one of the following three criteria has been met:
A. 
The development does not involve the construction of permanent or habitable structures.
B. 
The development is a public or private park or recreational use or municipal utility use.
C. 
The development is a water-dependent structure such as a dock, pier, bridge, or floating marina.
If a floodway boundary is not designated on an official FEMA map available to the city, the floodway boundary can be estimated from available data. Proposed development along such estimated floodway boundary shall not result in an increase of the base flood level greater than one foot as certified by a registered professional engineer.
(Ord. 08-06 § 3, 2008)

§ 2.5.170 Alteration of the flood carrying capacity of a watercourse prohibited.

No development shall diminish the flood carrying capacity of a watercourse. Subject to the foregoing regulation, no person shall alter or relocate a watercourse, without submittal of a land use review application per Chapter 4.2 SDC. The city shall provide a minimum 30-day prior written notice to any adjacent community, and the Natural Hazards Mitigation Office of the Department of Land Conservation and Development. Maintenance of the altered watercourse shall be provided so that the flood carrying capacity is not diminished over time.
(Ord. 08-06 § 3, 2008)

§ 2.5.180 General information requirements.

In addition to the information required in other sections of this code, the application for any development proposed in the floodplain district must include the following information:
A. 
Elevations of the original contours.
B. 
Final elevations of proposed fills and excavations.
C. 
Base flood (100-year flood) elevations of the site.
D. 
Location of any designated floodway and base flood boundary.
E. 
Location of any designated wetlands and/or wildlife habitat (if applicable).
F. 
Proposed elevation in relation to mean sea level of the lowest floor (including basement) of all structures (if applicable).
G. 
Which watercourse will be altered or relocated as a result of proposed development (if applicable).
H. 
If floodproofing is required, the proposed description and elevation of floodproofing.
(Ord. 08-06 § 3, 2008)

§ 2.5.190 Land division and planned development standards.

Land divisions and planned developments in the floodplain district shall be reviewed by the planning commission as a part of the land use planning process.
Notwithstanding other provisions of this code, all land division and planned development applications which propose actual development within a floodplain district shall be processed under the Type III process. An application to develop property which has a floodplain on it, but where no development is proposed in that floodplain, will be processed as otherwise required in this code. In the case of a land division, “no actual development” means the floodplain area has been excluded from the land division. This can be done by setting the property aside for some other purpose than later development, for example, as a public drainage right-of-way.
In addition to the general review criteria for land divisions and planned developments in Article 4, applications which propose actual development within the floodplain district shall also be subject to the following standards:
A. 
All land division proposals shall be consistent with the need to minimize flood damage.
B. 
All land division proposals shall have public utilities and facilities such as sewer, gas, electrical, and water systems located and constructed to minimize flood damage.
C. 
All land division proposals shall have adequate drainage provided to reduce exposure to flood damage.
D. 
Any lot created for development purposes must have adequate area created outside of the floodway to maintain a buildable site area meeting the minimum requirements of this code.
E. 
Any new public or private street providing access to a residential development shall have a roadway crown elevation not lower than one foot below the 100-year flood elevation.
F. 
All land divisions or planned developments in the floodplain district shall show the location of the 100-year flood contour line followed by the date the flood elevation was established. Where elevation data is not available, either through the Flood Insurance Study or from another authoritative source, and the development is four or more acres or results in four or more lots or structures, the elevation shall be determined and certified by a registered engineer. In addition, a statement located on or attached to the recorded map or plat shall read as follows:
Development of property within the 100-year floodplain as most currently established by the Federal Emergency Management Agency or city of Silverton may be restricted and subject to special regulations by the City.
(Ord. 08-06 § 3, 2008)

§ 2.5.200 Manufactured home parks.

Manufactured home parks and manufactured home subdivisions proposed in the floodplain district shall be reviewed by the planning commission. Notwithstanding other provisions of this code, all manufactured home park and subdivision applications which propose actual development within the floodplain district shall be processed under a Type III process. An application to develop property which has a floodplain on it, but where no development is proposed in that floodplain, will be processed as otherwise required in this code. In the case of a land division, “no actual development” means the floodplain area has been excluded from the land division. This can be done by setting the property aside for some other purpose than later development, for example, as a public drainage right-of-way. In addition to the general review criteria applicable to manufactured home parks, applications which propose actual development within the floodplain district shall include an evacuation plan indicating alternate vehicular access and escape routes. In addition, the standards listed in SDC § 2.5.210 also apply to the placement of manufactured homes within a floodplain.
(Ord. 08-06 § 3, 2008)

§ 2.5.210 Building standards.

Applications for building permits in the floodplain district shall be reviewed by the building official pursuant to locally adopted state building codes. In addition to building code criteria, all development in the floodplain district, except that exempted in SDC § 2.5.230, shall be subject to the following building standards:
A. 
The lowest floor, including basement, of any proposed structure (including manufactured homes and nonresidential structures) shall be placed at least three feet above the 100-year flood as determined by the latest Federal Insurance Study.
B. 
All new construction and substantial improvements shall be constructed with materials and utility equipment resistant to flood damage.
C. 
All new construction and substantial improvements shall be constructed using methods and practices that minimize flood damage.
D. 
Electrical, heating, ventilation, plumbing, and air conditioning equipment and other service facilities shall be designed and/or otherwise elevated or located so as to prevent water from entering or accumulating within the components during conditions of flooding.
E. 
All manufactured homes shall be on an adequately anchored, permanent foundation and be anchored to prevent flotation, collapse or lateral movement, and shall be installed using methods and practices that minimize flood damage. Anchoring methods may include, but are not limited to, the use of over-the-top or frame ties to ground anchors (reference FEMA’s “Manufactured Home Installation in Flood Hazard Areas” guidebook for additional details).
F. 
All new construction and substantial improvements shall be anchored to prevent flotation, collapse, or lateral movement and shall be installed or constructed using materials, methods, and practices that minimize flood damage.
G. 
All new and replacement public water supply systems shall be designed to minimize or eliminate infiltration of flood waters into the system.
H. 
All new and replacement public sanitary sewer systems shall be designed to minimize or eliminate infiltration of flood waters into the system and discharges from the system into flood water. On-site waste disposal systems shall be located to avoid impairment to them or contamination from them during flooding.
I. 
Property owners or developers shall file with the city a certificate whose format is acceptable to FEMA. This certificate must be approved by the building official, prepared by a registered surveyor or professional engineer, architect or surveyor, and maintained for public inspection. The certificate must contain:
1. 
The actual elevation (in relation to mean sea level) of the lowest floor including basement;
2. 
The elevation of any floodproofing; and
3. 
Whether or not the structure contains a basement.
J. 
If floodproofing methods are required as per subsection (B) of this section, the property owners or developers shall file with the city certification by a registered professional engineer or architect that the floodproofing methods meet or exceed FEMA standards.
(Ord. 08-06 § 3, 2008)

§ 2.5.220 Procedure.

A registered Oregon engineer or land surveyor shall visit the site prior to construction and set a reference datum on the site to establish the 100-year base flood elevation. This elevation shall be shown on the building plans submitted to the city for review.
Upon issuance of the building permit, the owner or contractor of record shall set the top of the foundation forms so that the floor and mechanical equipment are three feet above the reference datum that was set by the engineer or surveyor.
Foundation approval to pour will not be granted until the engineer or surveyor has verified the elevation of the top of the forms. Verification shall be written and available to the inspector on site at the time of inspection.
(Ord. 08-06 § 3, 2008)

§ 2.5.230 Flood hazard reduction standards.

All flood hazard reduction measures are required, as applicable, and must be certified as required in SDC § 2.5.210(I) and (J) to at least meet the following standards (these standards do not apply to structures exempted in this section):
A. 
All structures: fully enclosed areas below the lowest floor and lower than three feet above the 100-year flood level must meet or exceed the following minimum criteria:
1. 
A minimum of two openings, having a total net area of not less than one square inch for every square foot of enclosed area subject to flooding, shall be provided.
2. 
The bottom of all openings shall be no higher than one foot above grade.
3. 
Openings may be equipped with screens, louvers, or other coverings or devices; provided, that they permit the automatic entry and exit of floodwaters.
B. 
Nonhabitable construction meeting the certification requirements of SDC § 2.5.210(I) and (J) can have the lowest floor and attendant utility and sanitary facilities located lower than one foot above the 100-year flood elevation if:
1. 
The structure is floodproofed so that areas lower than one foot above the 100-year flood level are watertight with walls substantially impermeable to the passage of water.
2. 
The structure has structural components capable of resisting hydrostatic and hydrodynamic loads and effects of buoyancy.
3. 
The applicant is notified that flood insurance premiums will be based on rates that are one foot below the floodproofed level.
4. 
The applicant files a certification by a registered professional engineer or architect that the design and methods of construction are in accordance with accepted standards of practice for meeting provisions of this section based on their development and/or review of the structural design, specifications and plans. Such certification shall be provided to the building official as set forth in SDC § 2.5.210(I).
5. 
Nonhabitable construction that is elevated, not floodproofed, must meet the elevation standards of SDC § 2.5.210 and the standards for space below the first floor as described in subsection (A) of this section.
(Ord. 08-06 § 3, 2008)

§ 2.5.240 Accessory buildings in floodplain districts that represent a minimal investment are exempt from the standards of SDC §§ 2.5.210 and 2.5.220.

The following standards, and all other regulations that apply to development in floodplain areas, apply to those buildings. The definition of “minimal investment” for the purposes of this section is a building which costs less than $10,000 in labor and materials to construct. The value of a proposed building will be that value stated on the application for building permits.
A. 
Accessory structures shall not be used for human habitation.
B. 
Accessory structures shall be designed to have low flood damage potential.
C. 
Accessory structures shall be constructed and placed on the building site so as to offer the minimum resistance to the flow of floodwaters.
D. 
Accessory structures shall be firmly anchored to prevent flotation which may result in damage to other structures.
E. 
Service facilities such as electrical and heating equipment shall be elevated and floodproofed.
(Ord. 08-06 § 3, 2008)

§ 2.5.250 Recreation vehicles in floodplain districts.

Recreation vehicles placed on sites in the floodplain are required to either:
A. 
Meet the requirements of SDC § 2.5.210, including the elevation and anchoring requirements for manufactured homes; or
B. 
Be on the site for fewer than 180 consecutive days; or
C. 
Be fully licensed and ready for highway use, on wheels or jacking systems attached to the site only by quick-disconnect-type utilities and security devices, and with no permanently attached additions.
(Ord. 08-06 § 3, 2008)

§ 2.5.260 Warning and disclaimer of liability.

The degree of flood protection required by this chapter is considered reasonable for regulatory purposes and is based on scientific and engineering considerations. Larger floods can and will occur on rare occasions. Flood heights may be increased as a result of failure of manmade structures and/or natural causes. This chapter does not imply that the land outside the area of special flood hazards or uses permitted within such areas will be free from flooding or flood damages. This chapter does not create liability on the part of the city of Silverton or any officer or employee thereof for any flood damages that result from reliance on this chapter or any administrative decision lawfully made thereunder.
(Ord. 08-06 § 3, 2008)

§ 2.5.270 Storage of material and equipment.

No storage of material or equipment is allowed within floodway areas, unless the storage can be approved upon determination that the following criteria have been satisfied:
A. 
Site plan approval has been received.
B. 
There is no storage or processing of material that is, in time of flooding, buoyant, flammable, toxic, explosive or otherwise could be injurious to human, animal, or plant life.
C. 
The material or equipment is not subject to major damage by floods and is firmly anchored to prevent flotation or is readily removable from the area within the time available after flood warning.
(Ord. 08-06 § 3, 2008)

§ 2.6.100 Purpose.

The intent of the hillside development overlay standards is to provide for supplementary regulations to underlying zoning districts to ensure that development occurs in such a manner as to protect the natural and topographic character and identity of these areas, environmental resources, the aesthetic qualities and restorative value of lands, and the public health, safety, and general welfare of the citizens of Silverton by ensuring that development does not create soil erosion, sedimentation of lower slopes, slide damage, flooding problems, and severe cutting or scarring. It is the intent of these development standards to encourage a sensitive form of development and to allow for a reasonable use that complements the natural and visual character of the city.
(Ord. 08-06 § 3, 2008)

§ 2.6.110 Applicability.

A. 
General. The hillside development standards apply to all areas that have an average slope of 12 percent or greater and areas classified as having moderate or high susceptibility to shallow and deep seated landslides by the Department of Geology and Mineral Industries (DOGAMI). Notwithstanding any provisions of the development code to the contrary, hillside lots in subdivisions and partitions receiving tentative approval on or after the effective date of the ordinance codified in this title shall comply with the minimum lot size standards set forth in this article. Hillside lots in other areas may, at the option of the developer or owner, meet such standards in lieu of those specified elsewhere in the development code. A topographical survey of the lot shall be furnished by any person wishing to meet the standards of this article. For development of any property after the effective date of the ordinance codified in this title, the community development director or building official may require a topographic survey showing two-foot intervals wherever there is a question as to whether the lot is a hillside lot.
B. 
Exemptions.
1. 
An excavation or fill that is less than three feet in depth, or which involves less than 50 cubic yards of volume; or
2. 
Emergency actions required to prevent an imminent danger to public or private property, as determined by the community development director or designee; or
3. 
Any land use or activity that does not require a building or grading permit or land use approval.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.6.120 General.

All development proposed within the hillside development overlay district is required to provide for the preservation and, if possible, enhancement of the site’s natural features during all phases of the design and development process. This includes consideration of soils, vegetation, hydrology, wild-life habitat, views and visual orientation, both from the site and to the site, and unusual or unique natural features.
(Ord. 08-06 § 3, 2008)

§ 2.6.130 Reports required.

Prior to issuance of a land use decision or a building permit on land that exceeds 12 percent average slope or contains areas classified as having moderate or high susceptibility to shallow-seated and deep-seated landslides by DOGAMI, a geotechnical study prepared and stamped by a geotechnical engineer and certified engineering geologist, following applicable guidelines for preparing engineering geologic reports in Oregon as adopted by the Oregon State Board of Geologist Examiners, indicating that the site is stable for the proposed use and development shall be submitted to the city. Peer review of a geotechnical study required by this chapter shall be performed by a professional or professional firm of the city’s choice that meets the qualifications listed above. The peer review will occur at the applicant’s expense.
The study shall be approved for a specific development plan and shall be valid for five years. Should the time limit expire for the approved study, if environmental conditions associated with the site change, or if the proposed development activities change, an amendment to the study shall be submitted for review. The study shall include the following information:
A. 
Index map.
B. 
Project description to include location, topography, drainage, vegetation, discussion of previous work and discussion of field exploration methods.
C. 
A scale-drawing site plan of the property, showing all natural physical features, topography at two-foot contour intervals, steepness of slopes, location of all test excavations or borings, water-courses both perennial and intermittent, ravines and all existing and manmade structure or features all fully dimensioned, trees six-inch caliper or greater measured four feet from ground level, rock outcroppings and drainage facilities.
D. 
A scale-drawing map for the property showing areas with zero to 11.9 percent slopes, 12 to 14.9 percent slopes, 15 to 24.9 percent slopes, 25 to 29.9 percent slopes, 30 to 34 percent slopes, and 34.1 to 100 percent slopes. The map shall include a square foot calculation for each slope category area on the site.
E. 
Site geology, based on a surficial survey, to include site geologic maps, description of bedrock and surficial materials, including artificial fill, locations of any faults, folds, etc., and structural data including bedding, jointing and shear zones, soil depth and soil structure.
F. 
Discussion of any off-site geologic conditions that may pose a potential hazard to the site, or that may be affected by on-site development.
G. 
Suitability of site for proposed development from a geologic standpoint.
H. 
Specific recommendations for cut and fill slope stability, seepage and drainage control or other design criteria to mitigate geologic hazards.
I. 
If deemed necessary by the engineer or geologist to establish whether an area to be affected by the proposed development is stable, additional studies and supportive data shall include cross-sections showing subsurface structure, graphic logs with subsurface exploration, results of laboratory test and references.
J. 
A scale-drawing grading plan, including all of the features and detail required for the site plan listed in subsection (C) of this section, but reflecting preliminary finished grades and indicating in cubic yards whether and to what extent there will be a net increase or loss of soil.
K. 
Signature and registration number of the engineer and/or geologist.
L. 
Additional information or analyses as necessary to evaluate the site.
M. 
Inspection schedule for the project.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.6.140 Development density options.

The developer has two options for the development of steeply sloped land. The first option, Option “A,” is designed to correlate minimum lot sizes to the average slope of the development area. The second option, Option “B,” is designed to allow, through a planned development, a density transfer bonus to stimulate development on those portions of the development area where the slope of the land is less than 12 percent. A combination of Options “A” and “B” may be used through a planned development.
A. 
Option “A”: Average Slope – Minimum Lot Size. In slope areas of 12 to 14.9 percent slope, the minimum lot areas shall be 10,000 square feet. In slope area of 15 to 24.9 percent, the minimum lot size shall be 12,000 sq. ft. In slope areas of 25 to 29.9 percent slope, the minimum lot size shall be 15,000 square feet and for areas of slope between 30 and 34 percent the minimum lot size shall be 20,000 square feet. All hillside lots created by following Option “A” shall meet the lot area and dimension standards of Table 2.6.140.
Areas with average slopes of greater than 34 percent prior to grading shall not be subdivided or partitioned further unless the area being divided is included in addition to the square footage required for building envelopes. However, open space, greenways and recreational trails may be developed in these areas. For those lots of record which have an average slope of greater than 34 percent and have no area less than 34 percent slope, the maximum residential development shall be one dwelling unit per lot of record. When density is transferred from areas in excess of 34 percent slope, density transfers shall be allowed at a rate of one dwelling unit per acre.
Table 2.6.140
Average Slope
Minimum Lot Size
Minimum Lot Frontage
Minimum Lot Depth
12 – 14.9%
10,000 sq. ft.
80 feet
100 feet
15 – 24.9%
12,000 sq. ft.
85 feet
100 feet
25 – 29.9%
15,000 sq. ft.
90 feet
100 feet
30 – 34%
20,000 sq. ft.
100 feet
100 feet
B. 
Option “B”: Planned Development Density Transfer Bonus. In order to promote the preservation of natural slopes greater than 12 percent, development density transfer is encouraged when dividing land. The density transfer is only feasible where there are sizable portions of the development area which have slopes less than 12 percent through a planned development process per Chapter 4.5 SDC. Determination of the density transfer bonus is a three-step process:
1. 
Determine the area of the parcel where the average slope of the land is:
a. 
Less than 12 percent.
b. 
From 12 to 14.9 percent.
c. 
From 15 to 24.9 percent.
d. 
From 25 to 29.9 percent.
e. 
From 30 to 34 percent.
f. 
In excess of 34 percent.
2. 
Determine the number of potential lots for the total development area which could have been permitted for the portion of the parcel where the average slope is greater than 12 percent, if the average slope option had been considered by using Table 2.6.140. Fractions shall be rounded to the nearest whole number.
3. 
Multiply the number of potential lots by 1.2 to determine the density that may be transferred to those sections of the development area where the slopes are less than 12 percent. Development shall occur in conformance with the provisions of the planned development process found in Chapter 4.5 SDC. Land of greater than 12 percent average slope subject to density transfer provisions shall be maintained as permanent open space or dedicated for park use. The findings and recommendations of the report required in SDC § 2.6.130 shall be considered and utilized during the development process.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 14, 2021)

§ 2.6.150 Building location and design standards.

All buildings and buildable areas proposed for hillside lands shall be designed and constructed in compliance with the following standards:
A. 
Building Envelopes. All newly created lots, either by subdivision or partition or property line adjustment, shall contain building envelopes conforming to the following standards:
1. 
The building envelopes shall contain a buildable area with a slope of 34 percent or less unless the division or lot line adjustment is for open space or conservation purposes.
2. 
Building envelopes and lot design shall address the retention of the following percentage of the lot in landscaping or in a natural state:
Average Slope
Minimum Lot Size
Maximum Lot Coverage (Impervious Surface)
12 – 14.9%
10,000 sq. ft.
35%
15 – 24.9%
12,000 sq. ft.
35%
25 – 29.9%
15,000 sq. ft.
30%
30 – 34%
20,000 sq. ft.
25%
3. 
Building envelopes shall be designed and located to maximize tree conservation while recognizing and following the standards for fuel reduction if the development is located in wildfire lands.
4. 
Building envelope locations shall be located to avoid ridgeline exposures, and designed such that the roofline of a building within the envelope does not project above the ridgeline.
B. 
Building Setbacks. Setbacks shall be the horizontal distance from the property line to the nearest vertical wall. Site plans and building elevations submitted for building permits shall include the topography of the site at two-foot intervals and building elevations in relation to the existing and proposed finished grade.
Minimum Setback
Downhill Lot
Uphill Lot
Living Adjacent to a Street
20 feet
20 feet
Garage
20 feet
20 feet
Side
15 feet
15 feet
Rear
30 feet
30 feet
C. 
Building Design. To reduce hillside disturbance through the use of slope-responsive design techniques, buildings on hillside lands shall incorporate the following into the building design and indicate features on required building permits:
1. 
Hillside Building Height. The building height shall be determined by the vertical distance from the lowest-grade plane to the average height of the highest roof surface. In no case will the height of the structure exceed 35 feet.
2. 
Fire Suppression. All buildings served by streets or roadways in excess of 10 percent grade shall have a fire suppression system installed.
3. 
Building Plans. All structures on hillside lands in excess of 14 percent shall be designed by an engineer or architect. Foundations shall be designed in accordance with a site-specific geotechnical report.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 15, 2021)

§ 2.6.160 Revegetation standards – Slopes greater than 20 percent.

Exposed soil which is not under continuous construction must be revegetated with temporary or permanent vegetation so that the soil is not left exposed for more than 60 days. Within six months of issuance of a certificate of occupancy, vegetation must be reestablished. If irrigation is not provided, then the exposed soil must be planted with species which can survive without irrigation. Vegetative cover or any alternative cover (rock, masonry, etc.) must be maintained in perpetuity.
(Ord. 08-06 § 3, 2008)

§ 2.6.170 Grading, cut and fill standards.

All cut and fill slopes must not exceed a two (horizontal) to one (vertical) ratio. Slopes which are steeper (i.e., 1:1.5 or 1:1) may be conditionally approved by the public works director upon certification, by a qualified soils engineer or geologist, that the slope will remain stable under foreseeable conditions. The certification must delineate any specific stabilization measures deemed necessary by the soils engineer or geologist. As a condition of approval, a designated state certified person on the grading crew shall be employed by the developer to determine soil stability on all cut and fill slopes and take appropriate measure where unstable soils are encountered.
(Ord. 08-06 § 3, 2008)

§ 2.6.180 Grading and erosion control.

All development on lands classified as hillside lands shall be required to conform to the following items:
A. 
Plans. All grading, retaining wall design, drainage, and erosion control plans for development on hillside lands shall be designed by a geotechnical expert. All cuts, grading or fills shall conform to the most current State Structural Code. Erosion control measures on the development site shall be required to minimize the solids in runoff from disturbed areas. Temporary erosion control measures shall be taken throughout the course of development and construction, and permanent measures shall be taken thereafter to prevent erosion from foreseeable sources.
B. 
Time Period. For development other than single-family homes or duplexes on individual lots, all grading, drainage improvements, or other land disturbances shall only occur from May 1st to October 31st. Excavation shall not occur during the remaining wet months of the year. Erosion control measures shall be installed and functional by October 31st. Up to a 30-day modification to the October 31st date and a 45-day modification to the May 1st date may be made by the community development director, based upon weather conditions and in consultation with the project geotechnical expert. The modification of dates shall be the minimum necessary, based upon evidence provided by the applicant, to accomplish the necessary project goals.
C. 
Grading – Cuts. All cut slopes on areas classified as hillside lands shall be designed by a registered structural engineer, and the following standards shall apply:
1. 
Cut slope angles shall be determined in relationship to the type of materials of which they are composed. Where the soil permits, limit the total area exposed to precipitation and erosion. Steep-cut slopes shall be retained with stacked rock, retaining walls, or a functional equivalent to control erosion and provide slope stability when necessary. Where cut slopes are to be laid back (1:1 or less steep), the slope shall be protected with erosion control netting or a structural equivalent installed per manufacturer’s specifications, and revegetated.
2. 
Exposed cut slopes, such as those for streets, driveways, accesses, or yard areas, greater than seven feet shall be terraced. Cut faces on a terraced section shall not exceed a maximum height of four feet or five feet if building permits are obtained. Terrace widths shall be a minimum of three feet to allow for the introduction of vegetation for erosion control. Total cut slopes shall not exceed a maximum vertical height of 15 feet.
a. 
The top of cut slopes not utilizing structural retaining walls shall be located a minimum setback of one-half the height of the cut slope from the nearest property line.
b. 
Cut slopes for structure foundations encouraging the reduction of effective visual bulk, such as split pad or stepped footings, shall be exempted from the height limitations of subsection (D)(1) of this section.
3. 
Re-vegetation of cut slope terraces shall include the provision of a planting plan, introduction of topsoil where necessary, and the use of irrigation if necessary. The vegetation used for these areas shall be native or species similar in resource value, which will survive, help reduce the visual impact of the cut slope, and assist in providing long-term slope stabilization. Trees, bush-type plantings and cascading vine-type plantings may be appropriate. On slopes likely to be extensively disturbed by later construction, an interim ground cover shall be planted or other suitable temporary measures taken, to be supplemented by the permanent ground cover or shrubs and trees when the site is finally developed and landscaped.
D. 
Grading – Fills. On all fill slopes on lands classified as hillside lands, the following standards shall apply:
1. 
Fill slopes shall not exceed a total vertical height of 15 feet. The toe of the fill slope area shall be a minimum of six feet from the nearest property line.
2. 
Fill slopes shall be protected with an erosion control netting, blanket or functional equivalent. Netting or blankets shall only be used in conjunction with an organic mulch such as straw or wood fiber. The blanket shall be applied so that it is in complete contact with the soil, so that erosion does not occur beneath it. Erosion netting or blankets shall be securely anchored to the slope in accordance with manufacturer’s recommendation.
3. 
Utilities. Whenever possible, utilities shall not be located or installed on or in fill slopes. When determined that it is necessary to install utilities on fill slopes, all plans shall be designed by a geotechnical expert.
4. 
Re-vegetation of fill slopes shall utilize native vegetation or vegetation similar in resource value and which will survive and stabilize the surface. Irrigation may be provided to ensure growth if necessary. Evidence shall be required indicating long-term viability of the proposed vegetation for the purposes of erosion control on disturbed areas.
E. 
Re-vegetation Requirements. Where required, all re-vegetation of cut and fill slopes shall be installed prior to the issuance of a certificate of occupancy, signature of a required survey plat, or other time as determined by the hearing authority. Vegetation shall be installed in such a manner as to be substantially established within one year of installation. If such measures are considered ineffective, the director of public works or his designee shall prescribe alternative measures to control erosion. Upon the failure of the person responsible to institute such measures within 30 days of notice to do so, the director of public works shall obtain competitive bids and let a contract in the name of the city of Silverton for the performance of such work. All costs incurred thereby shall become a lien against the property to be assessed, collected, and enforced as provided for dangerous buildings in Chapter 15.08 SMC.
F. 
Maintenance, Security, and Penalties for Erosion Control Measures.
1. 
Maintenance. All measures installed for the purposes of long-term erosion control, including but not limited to vegetative cover, rock walls, and landscaping, shall be maintained in perpetuity on all areas which have been disturbed, including public rights-of-way. The developer or subdivider shall record covenants for the property to ensure the ongoing maintenance of erosion control measures.
2. 
Security and Penalties. Except for individual lots existing prior to December 1, 2005, after an erosion control plan is approved by the hearing authority and prior to construction, the applicant shall provide a performance bond or other financial guarantees in the amount of 120 percent of the value of the erosion control measures necessary to stabilize the site. Any financial guarantee instrument proposed other than a performance bond shall be approved by the city attorney. The financial guarantee instrument shall be in effect for a period of at least one year, and shall be released when the community development director and public works director determine, jointly, that the site has been stabilized. All or a portion of the security retained by the city may be withheld for a period up to five years beyond the one-year maintenance period if it has been determined by the city that the site has not been sufficiently stabilized against erosion.
G. 
Site Grading. The grading of a site on hillside lands shall be reviewed considering the following factors:
1. 
Hazardous or unstable portions of the site shall be avoided.
2. 
Existing natural drainage systems shall be utilized, as much as possible, in their natural state, recognizing the erosion potential from increased storm drainage.
3. 
Flow-retarding devices, such as detention ponds and recharge berms, shall be used where practical to minimize increases in runoff volume and peak flow rates due to development. The needs for an emergency overflow system to safely carry any overflow water to an acceptable disposal point shall be considered for each facility.
4. 
Stormwater facilities shall be designed, constructed and maintained in a manner that will avoid erosion on site and to adjacent and downstream properties.
5. 
Alternative stormwater systems, such as dry well systems, detention ponds, and leach fields, shall be designed by a registered engineer or geotechnical expert and approved by the city’s public works director or building official.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 16, 2021)

§ 2.6.190 Storm drainage.

In all slope areas, impervious surface drainage from roofs, driveways, and parking areas must be directed to a city storm drain or other city-approved drainage system. Development activities must not block the flow of stormwater in natural drainage ways without prior approval of an alternative solution by the public works director. With application for tentative plan approval for a subdivision or partition, the applicant shall submit a conceptual plan for stormwater control. The plans shall include but are not limited to the following items as appropriate: location of curbs, gutters, inlets, catch basins, detention facilities and stabilized outfalls. Prior to the signing of the final plat, the applicant shall submit a permanent and complete stormwater control plan.
(Ord. 08-06 § 3, 2008)

§ 2.6.200 Street standards.

A. 
Where practical, streets must be contoured to hillside areas in order to minimize environmental and scenic disruption. Street grades shall generally be 10 percent or less. Street grades of up to 12 percent may be permitted for a distance of no more than 300 feet only where topographical conditions make it impractical to meet the 10 percent standard. No intersections are permitted where street grades exceed 10 percent. Street grades over 12 percent will require variance approval by the approval authority. In no case shall a street grade exceed 15 percent for any distance. Street rights-of-way may be 40 feet in width with a minimum 28-foot-wide curb-to-curb improvement, with a five-foot-wide curb line sidewalk on one side and 10-foot-wide utility easements on both sides. The area within the utility easement shall be graded to meet the requirements of the private utilities.
B. 
A minimum three-foot-wide level shoulder shall be provided adjacent to all exposed public improvements such as sidewalks and streets in areas classified as hillside lands.
C. 
All constructed cut or fill slopes adjacent to street or sidewalk improvements must be entirely within slope easements, given to the city of Silverton, and shall be shown as such on both preliminary and final subdivision plats in areas classified as hillside lands. All retaining walls and other improvements, including landscaping, within the slope easement area shall in all cases be the property owner’s responsibility to maintain or replace.
D. 
Retaining walls necessary for public street improvements in areas classified as hillside lands and on public rights-of-way shall be designed and constructed as per the city’s standard specifications. The developer shall be required to reimburse the city for an independent geotechnical/structural design review by a qualified engineer, selected by the city, on all walls over five feet in height.
(Ord. 08-06 § 3, 2008)

§ 2.6.210 Driveway standards.

The maximum difference in elevation between the curb line and finished floor level of the garage or carport for driveways serving individual hillside lots shall be on a slope of 15 percent or less. The building official may permit a difference in elevation not exceeding a 20 percent slope; provided, that there is no slope exceeding 25 percent between any two points in the driveway, and that adequate vertical curves or ramps are used in the driveway to assure usability by a standard-size American automobile. A driveway serving a residence located more than 50 feet from the public road shall conform to the following standards, which are necessary for adequate access for emergency vehicles:
A. 
Be improved with an all weather surface with a minimum width of 12 feet and four feet of unobstructed clearance on both sides. The unobstructed clearance areas may consist of four-foot graveled shoulders on both sides;
B. 
Have a maximum grade of 12 percent for no more than 300 feet;
C. 
Driveways 150 feet in length or more shall be provided with a vehicle turnaround meeting the approval of the Silverton fire district; and
D. 
Provide adequate sight distance at the intersection with a public street.
(Ord. 08-06 § 3, 2008)

§ 2.6.220 Tree conservation, protection and removal.

Refer to Chapter 3.6 SDC for tree requirements.
(Ord. 08-06 § 3, 2008; Ord. 25-09 § 2, 2025)

§ 2.6.230 Modification of standards.

If the review body determines that the applicant’s plan adequately implements the policies of the comprehensive plan, the review body may modify the standards of this code as they apply to the entire proposed development, within the following limitations:
A. 
Front, side and rear yards may be reduced (when in conformance with the fire and building safety codes); provided, however, where attached dwellings are proposed there shall not be more than five dwelling units in any group.
B. 
The reduction of public right-of-way, pavement width, and/or requirements for the installation of sidewalks as specified in Chapter 3.4 SDC, Public Facilities, may be made if provisions are made to provide off-street parking in addition to that required in other portions of this code. Any reduction of these minimum street and sidewalk standards must be approved by the public works director. The additional parking requirements are as follows:
1. 
Detached Dwelling Units and Duplexes. Two additional off-street parking spaces.
2. 
Attached Dwelling Units. One-half additional off-street parking space for each bedroom more than one in each unit. In cases where a half space occurs in a total figure, the standard shall be increased to the next whole figure.
(Ord. 08-06 § 3, 2008; Ord. 21-04 § 17, 2021)

§ 2.6.240 Variance from hillside lands development standards.

In addition to the variance review criteria listed in Chapter 5.1 SDC, the following review criteria must also be met:
A. 
The variance is consistent with the stated purpose and intent of the physical and environmental constraints of the hillside development provisions.
B. 
The amount of deviation from standards is the least amount necessary in order to provide a practical solution to the environmental constraints of the hillside area.
C. 
The variance provides for an improvement in design or other characteristic better than would result from complying with the established hillside regulations.
(Ord. 08-06 § 3, 2008)

§ 2.7.110 Wetland – Purpose.

The wetlands overlay district is intended to ensure that wetland sites within the city are developed with all due sensitivity for the vital role these areas play in the environment.
(Ord. 08-06 § 3, 2008)

§ 2.7.120 Applicability.

The wetland area regulations apply to those areas meeting Division of State Lands criteria for wetland classification. Precise wetland boundaries may vary from those shown on the comprehensive plan map exhibit if on-site inspection and delineation by a recognized authority and/or other city-approved documentation indicate more accurate boundaries. Those more precise boundaries can be identified, mapped, and used for review and development without a change in the comprehensive plan wetlands map exhibit. All developments proposed within a designated wetland area shall be subject to the provisions of conditional use review and the wetland area regulations. If the development area is within the floodplain district, then the floodplain district regulations of Chapter 2.5 SDC shall also apply.
(Ord. 08-06 § 3, 2008)

§ 2.7.130 Restrictions on development within wetlands.

No development shall result in the elimination of a wetland area, result in eventual elimination of wetland characteristics, or be located totally within a wetland area without acquiring permit approval from federal and state regulatory agencies and the city of Silverton and, where necessary, amending the open space plan and zoning designation. Development may not infringe upon any designated wetland unless the review authority finds the following criteria have been met:
A. 
The development cannot be located outside the wetland area, or the wetland is proposed to be reconfigured such that the proposed total area is at least equal in size and quality to the wetland area existing prior to the proposed development. If the wetland area has not been substantially relocated, it is not necessary to remove the open space designation for such a modification.
B. 
The encroachment within the wetlands is the minimum required to complete the development.
C. 
Any encroachment or change in drainage which would adversely impact favorable wetland characteristics in the short- or long-term has been mitigated.
D. 
Development review is coordinated with the Division of State Lands and any other applicable agencies and other required permits have been obtained.
E. 
The applicable floodway or floodplain requirements of SDC §§ 2.5.100 through 2.5.270 have been met.
F. 
The open space, vegetation, and wildlife protection policies of the comprehensive plan have been addressed.
(Ord. 08-06 § 3, 2008)

§ 2.7.140 Floodplain district and wetlands density calculation.

Residential lands located in a floodplain district or wetland area shall not be used in calculating total project density except as follows:
A. 
Land which has been approved for development features (structures, roads, required yard areas, etc.) under the provisions of SDC §§ 2.5.190 or 2.7.130.
B. 
In planned developments, land in a flood fringe or wetland area shall be calculated at 50 percent of the allowed density; provided, that the additional units can be incorporated harmoniously into the planned development and without adverse impacts on adjoining projects; and provided further, that the floodplain lands and wetlands can be effectively utilized within the planned development or dedicated for public use.
(Ord. 08-06 § 3, 2008)

§ 2.7.150 Riparian – Purpose.

A. 
The purpose of establishing a riparian corridor is to protect and restore Silver Creek and its associated riparian areas, and any other waterway specified in the Silverton comprehensive plan as having riparian areas determined to be significant, thereby protecting and restoring the hydrologic, ecologic, and land conservation functions these areas provide for the community.
1. 
To protect fish and wildlife habitat, enhance water quality, control erosion and sedimentation, and reduce the effects of flooding.
2. 
To protect and restore the natural beauty and distinctive character of Silver Creek as a community asset.
3. 
To enhance coordination among local, state, and federal agencies regarding development activities near waterways.
(Ord. 08-06 § 3, 2008)

§ 2.7.160 Definitions.

The following definitions shall apply to SDC §§ 2.7.150 to 2.7.230:
“Fish-bearing stream”
means a stream inhabited at any time of the year by anadromous or game fish species, or fish that are listed as threatened or endangered species under the federal or state Endangered Species Act.
“Riparian area”
means lands adjacent to rivers, streams, lakes, ponds, and other water bodies. They are transitional between aquatic and upland zones, and as such, contain elements of both aquatic and terrestrial ecosystems. They have high water tables because of their close proximity to aquatic systems, soils that are usually made up largely of water-carried sediments, and some vegetation that requires free (unbound) water or conditions that are more moist than normal.
“Riparian vegetation”
means native ground cover, shrubs, trees, and other vegetation predominately influenced by their association with water.
“Top-of-bank”
means the first major change in the slope of the incline from the ordinary high water level of a water body. A major change is a change of 10 degrees or more. If there is no major change within a distance of 50 feet from the ordinary high water level, then the top of bank will be the elevation two feet above the ordinary high water level.
(Ord. 08-06 § 3, 2008)

§ 2.7.170 Riparian corridor – Applicability.

A. 
The provisions of SDC §§ 2.7.150 through 2.7.230 shall be applied to Silver Creek and any other waterway specified in the Silverton comprehensive plan as having riparian areas determined to be significant. The provisions shall apply regardless of whether or not a building permit, development permit, or plan authorization is required, and do not provide any exemption from state or federal regulations. When a locally significant wetland is located within or adjacent to a riparian corridor, the riparian corridor setback will be applied, and shall be measured from the boundary of the wetland.
B. 
Applications for plan authorizations (except annexations), development permits, or building permits, and plans for proposed public facilities on parcels containing a riparian corridor, or a portion thereof, shall contain a to-scale drawing that clearly delineates the top-of-bank and riparian corridor boundary on the entire parcel or parcels.
C. 
When reviewing plan authorization or development permit applications for properties containing a riparian corridor, or portion thereof, the approving authority shall consider the purpose statements in SDC § 2.7.150 in determining the extent of the impact on the riparian corridor.
D. 
The planning commission shall be the approving authority for applications for exceptions to the provisions herein pertaining to riparian corridors and said applications shall be processed as Type III applications in accordance with SDC § 4.1.400. In addition, said request shall be submitted to the Oregon Department of Fish and Wildlife for habitat mitigation recommendation pursuant to OAR 635-415, Fish and Wildlife Habitat Mitigation Policy.
(Ord. 08-06 § 3, 2008)

§ 2.7.180 Riparian corridor – Location.

The riparian corridor boundary shall extend 25 feet measured horizontally from the top-of-bank, as defined herein, or both sides of those waterways defined in SDC § 2.7.170(A) and having an average annual stream flow of less than 1,000 cubic feet per second (cfs), unless a request to reduce the setback has been approved according to SDC § 2.7.220. Where the top-of-bank has been relocated as part of an approved waterway restoration project, at the request of affected property owners, the riparian corridor boundary shall extend 25 feet from the original top-of-bank.
(Ord. 08-06 § 3, 2008)

§ 2.7.190 Permitted activities within riparian corridors.

A. 
Any use, sign, or structure, and the maintenance thereof, lawfully existing on the date of adoption of the provisions herein is permitted within a riparian corridor. Such use, sign, or structure may continue at a similar level and manner as existed on the date of adoption of the provisions herein. The maintenance and alteration of pre-existing ornamental landscaping is permitted within a riparian corridor as long as no additional riparian vegetation is disturbed. The provisions of this section shall not be affected by any change in ownership of properties containing a riparian corridor.
B. 
The following activities, and maintenance thereof, are permitted within a riparian corridor, subject to obtaining applicable permits, if any, from the Oregon Department of State Lands and the U.S. Army Corps of Engineers. All plans for development and/or improvements within a riparian corridor shall be submitted to the Oregon Department of Fish and Wildlife for a habitat mitigation recommendation pursuant to OAR 635-415, Fish and Wildlife Habitat Mitigation Policy.
1. 
Waterway restoration and rehabilitation activities such as channel widening, realignment to add meanders, bank grading, terracing, reconstruction of road crossings, or water flow improvements.
2. 
Restoration and enhancement of native vegetation, including the addition of canopy trees; cutting of trees which pose a hazard due to threat of falling if the tree is left in the riparian area after felling; or removal of nonnative vegetation if replaced with native plant species at the same amount of coverage or density.
3. 
Normal farm practices, other than structures, in existence at the date of adoption of the provisions herein, on land zoned for farm use.
4. 
Normal flood control channel maintenance practices within a waterway, other than structures, necessary to maintain flow.
5. 
Replacement of a permanent legal non-conforming structure in existence at the date of adoption of the provisions herein with a structure in the same location, if it does not disturb additional riparian area, and in accordance with the provisions of Chapter 5.2 SDC, Nonconforming Uses and Development.
6. 
Expansion of a permanent legal nonconforming structure in existence at the date of adoption of the provisions herein, if the area of the expansion is not within the riparian corridor, and in accordance with the provisions of Chapter 5.2 SDC.
7. 
Perimeter mowing and other cutting necessary for hazard prevention.
C. 
New fencing may be permitted subject to consideration by the community development director or his/her designee in consultation with the director of public works and applicable state and federal agencies. An application for new fencing within a riparian corridor shall contain a to-scale drawing that clearly delineates the top-of-bank and riparian corridor boundary on the entire parcel or parcels, and shall indicate why the proposal is necessary and how it minimizes intrusion into the riparian corridor.
(Ord. 08-06 § 3, 2008)

§ 2.7.200 Conditional uses within riparian corridors.

The following activities, and maintenance thereof, are allowed within a riparian corridor if compatible with SDC § 2.7.150 and if designed to minimize intrusion. Such activities shall be subject to approval of a conditional use, which may be considered separately or in conjunction with another application review. The approving authority must determine that the proposal complies with at least one of the conditional use review criteria found in Chapter 4.4 SDC. Application permits, if any, from the Oregon Department of State Lands and the U.S. Army Corps of Engineers shall subsequently be obtained. All development and improvement plans shall be submitted to the Oregon Department of Fish and Wildlife for a habitat mitigation recommendation pursuant to OAR 635-415, Fish and Wildlife Habitat Mitigation Policy.
A. 
Water-related or water-dependent uses, such as drainage facilities and irrigation pumps.
B. 
Utilities or other public improvements.
C. 
Streets, roads, or bridges where necessary for access or crossings.
D. 
Multi-use paths, access ways, trails, picnic areas, or interpretive and educational displays and overlooks, including benches and outdoor furniture.
(Ord. 08-06 § 3, 2008)

§ 2.7.210 Prohibited activities within riparian corridors.

The following activities are prohibited within a riparian corridor, except as permitted in SDC §§ 2.7.190 and 2.7.200:
A. 
Placement of new structures or impervious surfaces.
B. 
Excavation, grading, fill, stream alteration or diversion, or removal of vegetation except for perimeter mowing for fire protection purposes.
C. 
Expansion of areas of pre-existing nonnative ornamental landscaping such as lawns, gardens, etc.
D. 
Dumping, piling, or disposal of refuse, yard debris, or other material.
(Ord. 08-06 § 3, 2008)

§ 2.7.220 Riparian corridors, reduction or deviation.

A request to reduce or deviate from the riparian corridor boundary provisions of this section may be submitted to the community development director or his/her designee for consideration. A deviation request may be approved as long as equal or better protection of the riparian area will be ensured through a plan for a conservation easement, restoration, enhancement, or similar means. Such a plan shall be submitted to the Oregon Department of Fish and Wildlife for habitat mitigation recommendation pursuant to OAR 635-415, Fish and Wildlife Habitat Mitigation Policy. In no case shall activities prohibited in SDC § 2.7.210 be located any closer than 25 feet from the top-of-bank. The planning commission shall be advised of the outcome of the deviation or reduction requests. Any decision of the community development director may be appealed to the planning commission as provided in Article 4 of this title.
(Ord. 08-06 § 3, 2008)

§ 2.7.230 Conservation and maintenance of riparian corridors.

When approving applications for the following: land divisions, planned developments, conditional uses, and variances, or for development of properties containing a riparian corridor or portion thereof, the approval authority shall assure longterm conservation and maintenance of the riparian corridor through one of the following methods:
A. 
The area shall be protected in perpetuity by a conservation easement recorded on deeds and plats prescribing the conditions and restrictions set forth in SDC § 2.7.150 through this section and any imposed by state or federal permits; or
B. 
The area shall be protected in perpetuity through ownership and maintenance by a private nonprofit organization by conditions, covenants, and restrictions (CC&Rs) prescribing the conditions and restrictions set forth in SDC § 2.7.150 through this section and any imposed by state or federal permits; or
C. 
The area shall be transferred by deed to a willing public agency or private conservation organization with a recorded conservation easement prescribing the conditions and restrictions set forth in SDC § 2.7.150 through this section and any imposed by state or federal permits; or
D. 
The area shall be protected through other appropriate mechanisms acceptable to the city of Silverton which ensure long-term protection and maintenance.
(Ord. 08-06 § 3, 2008)

§ 2.8.110 Purpose.

The public overlay district (/P) is intended to identify those properties that are in public, semi-public, or governmental ownership. These properties generally contain uses that are considered essential public services or otherwise allow uses, services or facilities that enhance the livability and quality of life for the Silverton general public. These uses, facilities or services are generally non-commercial and/or not-for-profit. The intent of the public (/P) overlay district is to recognize existing facilities, allow these sites to continue to be used to meet public needs, and when these facilities, uses, or sites are no longer needed, provide a system that allows for transfer into private ownership in accordance with established zoning. Typical types of uses that may occur within the public overlay zone are: fairground; exposition center; conference center; overnight lodging and related uses; campgrounds; airport; public park; public playground; public play field; stadium; armory; auditorium; golf course; fire station; library; museum; military training facility; cemetery; mausoleum; school; educational institution; public school or institution for those with disabilities or special needs; penal institution; reformatory; detention and correction home, institution or school; hospital; public medical and dental clinic; or municipal or governmental service building and use (e.g., reservoir, water tower, pump station, sewage treatment facility, water treatment facility, refuse transfer station or landfill, or caretaker’s unit associated with the primary use).
(Ord. 08-06 § 3, 2008)

§ 2.8.120 Applicability.

The public overlay is available to properties in public, semi-public, or governmental ownership. A zone map amendment (Chapter 4.7 SDC) is required to apply the overlay to properties in public, semi-public, or government ownership that change to a public, semi-public or government use. The overlay zone is in addition to the site’s base zone. Development of site with the (/P) overlay shall be consistent with the comprehensive plan and the public overlay standards as identified below in accordance with Article 4.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.8.130 Abandoning use – Transfer of ownership.

Whenever property within the public overlay (/P) is transferred to private ownership, such transferred area shall have the public overlay removed and the base zoning shall be the applicable zoning district for the property. Future development shall be consistent with the provisions of the applicable base zone and other relevant sections of the development code.
(Ord. 08-06 § 3, 2008)

§ 2.8.140 Changing use.

Any area shown on the official zoning map that has the public overlay (/P) shall be developed in accordance with the provisions of the public overlay zone and in accordance with Article 4.
(Ord. 08-06 § 3, 2008; Ord. 10-02 Exh. A § B, 2010)

§ 2.8.150 Allowed uses.

Use Categories
(Examples of uses are in Chapter 1.6 SDC; definitions are in Chapter 1.5 SDC.)
Public (P)
Residential Categories
 
All residential uses (household living and group living) allowed, if:
 
- Lawfully existing as of September 1, 2006, or
P
- Replacement or rebuilding of residential structure conforming to the same footprint as previously existed as of April 5, 2010, or
P
- New dwelling, freestanding, or
CU
- New dwelling(s) built in conjunction with a permitted use, including caretaker dwellings
P
Commercial Categories
 
Drive-up/drive-in/drive-through (drive-up windows, kiosks, ATMs, similar uses/facilities), per SDC § 2.3.160(A)
N
Bed and breakfast inn, per SDC § 2.2.200
N
Educational services, not a school (e.g., tutoring or similar services)
P
Entertainment, major event
P
Mobile food vendor, per SDC § 2.3.160(B)
S
Offices
P
Outdoor recreation, commercial
P
Parking lot (when not an accessory use)
P
Quick vehicle servicing or vehicle repair. (See also drive-up/drive-in/drive-through uses, per SDC § 2.3.160)
- Fully enclosed (e.g., garage)
N
- Not enclosed
N
Retail sales and service (see also drive-up uses, per SDC § 2.3.160)
- Fully enclosed (e.g., garage)
N
- Not enclosed (other than accessory uses)
N
- Eating establishments as an accessory use, enclosed in same building with primary use
P
- Eating establishment not enclosed
N
Self-service storage
N
Industrial Categories
 
Industrial service (see also drive-up uses)
- Fully enclosed (e.g., office)
N
- Not enclosed
N
Manufacturing and production
- Fully enclosed
N
- Not enclosed
N
Warehouse and freight movement
N
Waste-related
CU
Wholesale sales
- Fully enclosed
N
- Not enclosed
N
Institutional Categories
 
Basic utilities
P
Renewable energy facilities
- Accessory use
CU+S
- Primary use
CU+S
Nonrenewable energy facilities
N
Cemeteries, mausoleums, crematoriums, funeral services
CU
Colleges
CU
Community service
P
Daycare, adult or child daycare; does not include family daycare (16 or fewer children) under ORS 657A.250
P
Parks and open space
P
Religious institutions and houses of worship
CU
- Transitional shelter communities, per the standards in SDC § 2.2.200(N)
CU
Schools
- 20 or fewer students
P
- More than 20 students
CU
Wildlife rehabilitation facility
CU
Other Categories
 
Accessory structures (with a primary permitted use)
P
Agriculture – animals
N
Agriculture – nurseries and similar horticulture (see also, wholesale and retail uses)
CU
Historic building alterations, per Chapter 3.5 SDC
S
Mining
N
Radio frequency transmission facilities and telecommunication towers and antennas, except those allowed as ancillary to a primary permitted use
CU
Rail lines and utility corridors, except existing facilities on nonzoned RR properties are permitted
CU
Temporary uses (limited to P and CU uses), per SDC § 4.9.100
P/CU
Transportation facilities (operation, maintenance, preservation, and construction in accordance with the city’s transportation system plan)
P
Jails and detention facilities
CU
Key:
P = Permitted, subject to land use review or design review (Chapter 4.2 SDC). Other uses may be allowed with a planned development.
S = Permitted with standards (SDC § 2.3.160). Other uses may be allowed with a planned development.
CU = Conditional use required (Chapter 4.4 SDC). Other uses may be allowed with a planned development.
N = Not permitted.
(Ord. 10-02 Exh. A § B, 2010; Ord. 14-01 § 1 (Exh. A), 2014; Ord. 18-22 § 3, 2018)

§ 2.8.160 Public overlay district standards.

A. 
Land Development.
All Main Buildings Including Dwellings
 
Cemeteries, Educational Facilities, and Park Districts
Amusement, Recreation, Hospital, and Service Districts
Maximum number of main buildings per lot
Not limited
Not limited
Minimum Lot Area:
 
 
Dwellings – Same as prescribed for dwellings in
RM-10 district
RM-10 district
Minimum lot width
Not limited
Not limited
Maximum lot coverage
30 percent
Not limited
Maximum height
2.5 stories or 35 feet
6 stories or 70 feet
B. 
Yards.
1. 
The setbacks for the public overlay shall be the same as the underlying zoning district of the property.
2. 
Special Setbacks. Particular segments of arterial streets have been designated with special setback lines to provide better amenities along such streets. When a yard abuts such a street, the yard depth will be measured from the special setback line. See the official zoning map for the streets which have a special setback.
C. 
Building Orientation Standards. Developments subject to this section shall have their buildings oriented to a street, as generally shown in Figure 2.8.160(C)(1). All of the following criteria must be met:
1. 
Compliance with the setback and build-to line standards, where applicable in the underlying zone. The build-to line may be set back to provide additional space for pedestrian amenities between a building and its adjoining street. In the DC underlying zone, the maximum setback is five feet.
2. 
Except as provided in subsections (C)(4) and (5) of this section, all buildings shall have at least one primary building entrance (i.e., dwelling entrance, a tenant entrance, lobby entrance, or breezeway/courtyard entrance) facing an adjoining street (i.e., within 45 degrees of the street property line), or if the building entrance is turned more than 45 degrees from the street (i.e., front door is on a side elevation), the primary entrance shall not be more than 60 feet in the GC underlying zone, except to provide pedestrian amenities; a walkway shall connect the primary entrance to the sidewalk. In the DCF underlying zone, all buildings with street frontage must have at least one primary building entrance facing an adjoining street. Additionally, street-facing facades of buildings shall provide an entrance at least every 45 feet along the street.
3. 
Off-street parking, driveways, and other vehicle areas shall not be placed between buildings and the street(s) to which they are oriented. Off-street parking shall be oriented internally to the site, with parking bays separated by landscaping, as generally shown in Figure 2.8.160(C)(1). Bays shall contain no more than 10 parking spots each, as an average over all contiguous parking bays on the same parcel.
Figure 2.8.160(C)(1) - Building Orientation with Internal Parking
4. 
The building orientation standard may be met with vehicle areas allowed between the street right-of-way and a building’s primary entrance when the approval body finds that all of the following criteria are met:
a. 
Placing vehicle areas between the street right-of-way and building’s primary entrance will not adversely affect pedestrian safety, comfort or convenience, based on the distance from the street sidewalk to the building entrance, projected vehicle traffic volumes, and available pedestrian walkways;
b. 
The proposed vehicle areas are limited to one drive aisle of not more than 20 feet in width with adjoining bays of not more than eight consecutive parking spaces per bay (including ADA accessible spaces) on the side(s) of the drive aisle. (The intent of which is to create a drive aisle that is street-like, and to break up parking into small bays with landscaping.); and
c. 
The building’s primary entrance is connected to an adjoining street by a pedestrian cross-walk as specified under SDC § 3.1.300.
5. 
Where a development contains multiple buildings and there is insufficient street frontage to which buildings can be oriented, a primary entrance may be oriented to plaza or courtyard. When oriented in this way, the primary entrance(s) plaza or courtyard shall be connected to the street by a pedestrian walkway meeting the standards in SDC § 3.1.300.
(Ord. 08-06 § 3, 2008. Formerly 2.8.150; Ord. 10-02 Exh. A § B, 2010)

§ 2.8.170 Public overlay design standards.

A. 
Purpose. This section promotes the public health, safety, and welfare by requiring at least a minimum level of design on every building in the public overlay district. Design is important to identifying Silverton as a unique place with successful public use areas. The design standards are intended to:
1. 
Encourage architecture that is consistent with the character of Silverton.
2. 
Ensure that new development creates a close, intimate human scale and architectural designs address all four sides of a building.
3. 
Encourage the use of contextually appropriate materials, textures and colors.
4. 
Promote pedestrian-oriented uses by orienting buildings and their entrances to the street or to civic spaces abutting the street.
5. 
Create vibrant civic spaces (e.g., plazas, public art, cafe seating areas, etc.) oriented to take advantage of southern exposures; civic spaces should help identify the village, create intrigue, and offer weather protection and comfort to pedestrians while adding value to adjoining properties.
6. 
Break down large building masses and provide visual interest along the street.
7. 
Balance rhythm and continuity – encourage creativity in the design of building elevations, rooflines and facade elements.
8. 
Treat corner lots as focal points with vertical elements, public art, seating, and other design features.
9. 
Provide weather protection where commercial and mixed-use buildings abut the street.
B. 
Applicability. The following standards are applied through design review prior to building permit review. The applicant is required to demonstrate that the standards are met by complying with the criteria under each standard. Remodels of, or additions to, designated historic residential structures are subject to the requirements under Chapter 3.5 SDC. The provisions of this section may be adjusted through the design performance option in SDC § 4.2.510.
C. 
Pedestrian Orientation. The design of all buildings on a site shall support a safe and attractive pedestrian environment. This standard is met when the approval body finds that all of the criteria in subsections (C)(1) through (8) of this section are met. Alternatively, the approval body may approve an alternate design under SDC § 4.2.510 through a Type III procedure upon finding that the proposed design equally or better achieves the above standard.
1. 
The building orientation standards under SDC § 2.8.160 are met;
2. 
Primary building entrances shall open directly to the outside and, if not abutting a street, shall have walkways connecting them to the street sidewalk; every building shall have at least one primary entrance that does not require passage through a parking lot or garage to gain access;
3. 
Corner buildings (i.e., buildings within 20 feet of a corner as defined by the intersecting curbs) shall have corner entrances, or shall provide at least one entrance within 20 feet of the street corner or corner plaza;
4. 
At least 50 percent of a building’s street-facing elevation(s) shall be located at the build-to line or closer to the street; build-to lines are prescribed by SDC § 2.8.150;
5. 
Ground floor windows or window displays shall be provided along at least 50 percent of the building’s (ground floor) street-facing elevation(s). Design elements such as large regularly spaced and similarly shaped windows with window trim, and with transom or clerestory windows above building entrances are counted; windows and display boxes shall be integral to the building design and not mounted to an exterior wall;
6. 
Windows shall cover no more than 90 percent of the ground floor facade length, and shall not begin less than 18 inches or more than 30 inches above the sidewalk (except transom windows). Second and third story windows shall match the vertical and horizontal character of ground level windows;
7. 
Street-facing elevations shall be designed with weather protection, such as awnings, canopies, overhangs, or similar features. Such weather protection shall project a minimum of four feet and a maximum of eight feet over sidewalks or other pedestrian space;
8. 
Drive-up and drive-through facilities, when allowed, shall conform to SDC § 2.3.160.
D. 
Compatibility. All new buildings and major remodels shall be designed consistent with the architectural context in which they are located. This standard is met when the approval body finds that all of the criteria in subsections (D)(1) through (6) of this section are met. Alternatively, the applicant may propose different design elements as provided under SDC § 4.2.510, Design performance option.
1. 
There is continuity or effective transitions in building sizes between new and existing buildings;
2. 
The ground floor and upper floor elevations and architectural detailing are compatible with adjacent buildings;
3. 
Roof elevation is compatible with adjacent buildings (roof pitch, shape, height step-down);
4. 
There is continuity in the rhythm of windows and doors on the proposed building(s);
5. 
The relationship of buildings to public spaces, such as streets, plazas, other areas, and public parking, including on-street parking, is strengthened by the proposed building(s);
6. 
The materials, colors, and architectural style are compatible with Silverton’s character. Compatible materials include masonry, tile, stucco, split face concrete blocks, or wood. Unadorned poured or tilt-up concrete or metal siding are subject to design review. Entirely pre-cast concrete buildings are not permitted. Where blank walls are required for structural reasons, all such walls visible from public streets shall include a combination of architectural elements and features such as offsets, entry treatments, patterns of varied materials and colors, decorative murals and divisions into bays, or similar features.
E. 
Human Scale. The design of all buildings shall be to a human scale. This standard is met when the approval body finds that all of the criteria in subsections (E)(1) through (9) of this section are met. Alternatively, the applicant may propose different design elements as provided under SDC § 4.2.510, Design performance option.
1. 
Regularly spaced and similarly shaped windows are provided on all building stories;
2. 
Ground floor spaces have tall ceilings (i.e., 12 through 16 feet) with display windows on the ground floor;
3. 
Display windows are trimmed, recessed, or otherwise defined by wainscoting, sills, water tables, or similar architectural features;
4. 
On multistory buildings, ground floors are defined and separated from upper stories by appropriate architectural features (e.g., cornices, trim, awnings, canopies, arbors, trellises, overhangs, or other features) that visually identify the transition from ground floor to upper story; such features should be compatible with the surrounding architecture;
5. 
The tops of flat roofs are treated with appropriate detailing (i.e., cornice, pediment, flashing, trim, or other detailing) that is compatible with the surrounding architecture;
6. 
Pitched roofs have eaves, brackets, gables with decorative vents, or other detailing that is consistent with the surrounding architecture;
7. 
Historic design and compatibility requirements under Chapter 3.5 SDC, where applicable, are met;
8. 
Where buildings with greater than 10,000 square feet of enclosed ground floor space are proposed, they shall provide articulated facades on all street-facing elevations. This criterion is met when there is a major break in the building plane not less than once for every 30 feet of a building’s horizontal length. Breaks in building plane include windows, primary entrances, weather protection (awnings, canopies, arbors, arcades), offsets/projections/changes in elevation or horizontal direction, sheltering roofs, terraces, a distinct pattern of divisions in surface materials, ornamentation, screening trees, small-scale lighting (e.g., wall-mounted lighting or up-lighting), and/or similar features as generally shown in Figure 2.3.180(E). See also subsection (C) of this section; and
9. 
Utility equipment within landscaped areas or attached to structures are screened from view from public rights-of-way.
(Ord. 10-02 Exh. A § B, 2010)

§ 2.8.180 Special use standards.

A. 
Renewable Energy Facilities. Where renewable energy facilities are allowed, they shall require approval through conditional use review (Type III) and conform to all of the following standards.
1. 
Primary or Accessory Use. The use may be primary or accessory to an allowed use within the public overlay.
2. 
Maximum Height and Setback. Renewable energy facilities structures built according to the International Building Code shall meet the maximum height and setback standards of SDC § 2.4.150(A).
3. 
Performance Standards. Renewable energy facilities shall not exceed the performance standards stated by SDC § 2.4.170(C).
4. 
Landscaping. Screening and buffering for the facilities within the public overlay shall follow the standards of SDC § 3.2.300.
5. 
Other Permit or Licensing Requirements. The owner of the facility shall be responsible for obtaining and complying with all other applicable permit and/or licensing requirements.
(Ord. 10-02 Exh. A § B, 2010)