A. A one family cluster development shall be permitted at the developer's option, provided that the Planning Commission determines after review of documentation submitted in compliance with paragraph E and after a public hearing, that the parcel meets the qualification requirements of paragraph B, and that the proposed one family cluster development meets the site design requirements of paragraph C. The overall density permitted under this option remains substantially the same as is permitted in a conventional subdivision development (see section
22.01 D, permitted densities).
B. Qualification of parcel. In order to qualify a parcel for development under this section, the Planning Commission shall determine that the parcel has at least one of the following characteristics identified in paragraphs one through six, supported by documented evidence as required below, prepared by a registered architect, professional community planner, landscape architect, engineer or similar professional in environmental design:
1. The parcel contains natural assets which would be preserved through the use of cluster development. Such assets may include natural stands of large trees, land which serves as a natural habitat for wildlife, wetlands and bodies of water (i.e., streams, rivers, or other natural assets) which should be preserved. Requests for qualification under these conditions must be supported by documented evidence;
2. The parcel contains substantial portions of floodplain and wetlands worthy of preserving. A floodplain and wetlands map, certifiable by the appropriate federal, state or county agency, indicating the extent of the wetlands and floodplain area, shall be submitted to the Planning Commission in order to support the proposal for the parcel’s qualification for cluster development;
3. The parcel is either too small or unusually shaped to be reasonably platted as a conventional subdivision development. This characteristic shall not be considered present if there is adjoining property that can be reasonably combined with the parcel to enable development of a conventional subdivision;
4. A parcel fronting on a major or secondary thoroughfare (as designated on the Master Road Plan) of no more than 360 feet of depth measured from the front lot line abutting such thoroughfare, which, if platted as a conventional subdivision, would result in a substantial portion of the lots abutting such thoroughfare;
5. The adjoining or adjacent land uses warrant a creative development alternative to facilitate a smooth transition between conventional single family residential areas and uses which are or are likely to be incompatible;
6. A substantial portion of the parcel is characterized by poor soil conditions resulting from landfill activities. A detailed map of the parcel identifying that area where poor soil conditions exist shall be presented along with soil borings documenting the same;
7. In the absence of any of the above criteria, a parcel may be considered for qualification under this option if it expands or integrates existing common areas from adjoining developments of a similar nature, creates amenities in the form of woodlands, lakes, open spaces and common recreational areas and facilities or creates some other unique feature which will enhance the lifestyle and single family character of the area;
6. A request for the one family cluster option shall not be approved when:
a. The request would be contrary to the purpose of the option, which is to create better residential developments for the community by preserving open space, wetlands, woodlands and other natural assets and compatible use patterns;
b. The proposal would be contrary to the health, safety and general welfare of the developed and established residential areas in the immediate vicinity;
c. The proposal does not provide the privacy and character of single family living; or
d. The request does not provide for a sound physical development.
C. Site design requirements. All cluster developments shall conform to the following restrictions.
1. Within the cluster development, a minimum of 20% of the total parcel shall be in preservation areas. Road rights-of-way, bodies of water, utility easements, regulated wetlands, floodways, required yard areas and limited common areas not available for use by all of the residents within the development, while included in the total parcel area, shall be excluded from the preservation area calculations.
2. On parcels which contain wetlands, floodplains and/or landfill areas, the following shall apply:
a. When the wetland, floodplain and/or landfill area does not comprise 50% of the parcel, 25% of this land will be included in acreage for computation of density;
b. When the wetland, floodplain and/or landfill comprises 50% or more of the parcel, a 25% density increase will be permitted on land other than wetland, floodplain and/or landfill;
c. No density credit will be allowed for any bodies of water on the parcel, even if the entire shoreline is within the parcel to be developed; however, an area to be improved into a lake or pond, when approved by the city, shall not be excluded from the 25% density credit.
3. Buildings within a cluster development shall maintain the following minimum setbacks from a shoreline:
Number of Living Units per Building | Minimum Setback from Shoreline |
1 (single detached) | 35 feet |
2 attached | 40 feet |
3 or 4 attached | 50 feet |
4. The placement of housing units and other improvements shall be designed in such a way as to preserve wooded areas contained on the site. A tree preservation plan is required to be submitted to confirm the location of all wooded areas to be preserved.
5. There shall be no dwelling units or development other than streets, utility pathways, parking and recreation areas allowed within a defined floodplain.
6. There shall be no development or modification of any kind within a designated wetlands or floodplain area without there first being issued a use permit by the Department of Natural Resources (DNR) and/or the Zoning Board of Appeals, as required. However, a DNR permit does not guarantee approval by the city. Developers are encouraged to include the Local Planning Department in the negotiation process with the DNR.
7. In order to provide an orderly transition where the project proposed for use as a cluster development abuts a one family residential district, the abutting one family district shall be effectively buffered by providing one of the following forms of transition within the cluster development as determined to be appropriate by the Planning Department:
a. Detached single family dwellings subject to the standards of the applicable standards of section
28.08;
b. Natural stand of trees;
c. Effective landscape buffering (as specified in section
24.01).
8. Attaching of single family dwelling units may be permitted when said dwelling units are attached by means of an approved architectural wall detail or through a common wall in only the garage portion of adjoining structures. The maximum number of units which may be attached in the above described manner shall be four. Variety in the design of individual units shall be provided by the use of design details which do not appear to be continuous or repetitious, such as private entranceways or private outdoor courtyards. A building pattern which is repetitious throughout a project should not be used.
9. Utilization of cluster housing provides greater flexibility in grouping dwelling units and achieving more optimum development of problem site areas. However, it is also necessary to provide some variation between dwelling units and provide some visual and functional open space adjacent to each of the dwelling units. It is, therefore, required that each dwelling unit shall:
a. Have no more than 75% of the length of any exterior wall of a living unit in common with a garage or any portion of an adjacent dwelling unit;
b. Not have common walls with a garage or any portion of an adjacent dwelling unit on more than two exterior walls of any one dwelling unit;
c. Provide at least a six foot variation in building setback between two adjoining dwellings along any common building facade. This variation in setback may be provided between a dwelling unit and its attached garage when the attachment of dwellings occurs through the attachment of garages sharing a common facade line or through a variation in setback of attached garages;
d. For detached units, a variety of elevations with different architectural details shall be provided in order to ensure that the development is visually pleasing.
10. Except as provided herein, the area, height and bulk requirements of the applicable residential zoning district shall apply.
11. Yard requirements shall be provided as follows:
a. Minimum spacing between ends of buildings shall be determined by the number of living units that are arranged in any building group, as shown in the following table:
Number of Living Units per Building | Minimum Distance (feet) Between Buildings |
1 (single detached - 1 story) | 10 |
1 (single detached - 2 story) | 15 |
2 attached | 20 |
3 or 4 attached | 30 |
b. Between ends of two buildings having a different number of attached living units, the minimum distance (feet) will be as follows:
1-unit and 2-unit building | 15 |
1-unit and 3-unit building | 20 |
1-unit and 4-unit building | 25 |
2-unit and 3-unit building | 25 |
2-unit and 4-unit building | 30 |
3-unit and 4-unit building | 30 |
c. All buildings shall be set back the following minimum distances from the centerline:
d. All parking areas shall be set back a minimum of 35 feet from adjoining single family residential. In addition to the parking area required for each cluster unit under section
23.02, separate off-street hard surfaced parking areas shall be established evenly throughout the development to facilitate vehicular traffic circulation where private streets of less than 28 feet in width are used. There shall be at least one-half additional parking space provided for each cluster unit.
12. Cluster housing is designed to appeal principally to smaller households (e.g., childless couples, single adults and retirees). This market group wants housing which provides for both the basic needs and amenities found in conventional single family developments but without such owner and maintenance responsibilities associated with it or the larger unit size requirements of low density zoned properties.
Each dwelling unit constructed in the one family cluster development shall have as a minimum, a two car attached garage, full basement, two bedrooms, two full bathrooms and adjoining open space for patio or deck. No less than 75% of the exterior of the first story (excluding doors and windows) of all buildings, including all chimneys, hereafter erected shall be constructed of brick or stone building materials.
The minimum floor area per dwelling unit requirements may be adjusted in accordance with the following schedule:
Zoning District | Minimum Dwelling Unit Size for One Unit Building (square feet) | Minimum Dwelling Unit Size for Multiple Unit Buildings (square feet) | Average Dwelling Unit Size for Multiple Unit Buildings (square feet) |
R-100 | 1,500 | 1,350 | 1,500 |
R-90 | 1,500 | 1,350 | 1,500 |
R-80 | 1,400 | 1,250 | 1,400 |
R-70 | 1,250 | 1,100 | 1,250 |
R-60 | No adjustment allowed | | |
13. At least two deciduous or evergreen trees per dwelling unit (at least a two and one-half inch caliper measured one foot above the ground for deciduous trees and five feet in height for evergreen trees) shall be planted in the project area, in addition to existing vegetation. Location of such trees, as well as existing trees, shall be indicated on the site plan in accordance with the environmental provisions.
14. An undulating landscaped berm, at least five feet high, meeting the requirements of section
24.01(B)(2), or equivalent natural buffer, shall be provided along the entire property abutting a major or secondary thoroughfare. Slopes of said berm shall be gentle enough so as not to erode when planted with grass; berm locations shall be designed so that the view of oncoming traffic is not obscured at the intersection, as per the requirements of section
28.03. The Engineering Department shall review the proposed berm to determine that adequate drainage is provided.
15. A detailed landscape plan shall be submitted prior to final site plan approval.
16. Sidewalks are required to be installed along all major, secondary and collector roads. The developer shall have the option of installing sidewalks adjacent to local streets, or in lieu thereof may install a pedestrian circulation system within the common areas to the rear of the unit. The developer must obtain approval from the city of the pedestrian circulation system or the plan showing the location of the sidewalks to be installed as part of the site plan approval. If the developer elects to install sidewalks adjacent to any local street, the garage, driveway approach and sidewalks shall be designed and constructed so that vehicles parking on the driveway of the unit will not obstruct pedestrian circulation on the sidewalk.
17. The applicant shall provide satisfactory assurance that the amenities and those areas shown on the plan for use by the public or occupants of the development will be, or have been, irrevocably committed for that purpose. The city may require that conveyances or other documents be placed in escrow to accomplish this purpose and that a performance guarantee, as prescribed in section
29.04, be provided.
18. Fencing shall not be permitted on the interior of the development, except as approved by the Planning Department in accordance with the following:
a. All fencing shall be uniform in character and design;
b. All fencing shall be in scale with the development.
19. The developer shall deposit with the City Clerk a cash deposit, certified check or irrevocable letter of credit acceptable to the city covering the estimated cost of common area improvements associated with the project (as verified by the city) for which special land use approval is sought. The performance guarantees shall be deposited at the time of the issuance of the permit authorizing the activity or project. As improvements have been completed, the city shall release a proportionate share of any cash deposits made on the required improvements as the work has progressed.
20. All yard improvements to the project area shall be in conformance with the site improvements identified and accepted as part of the approved site plan.
21. Open space requirements shall be provided as follows:
a. All areas which are reserved for open space, including active recreation areas and those left in a natural state (such as stands of trees and woodlands, wetlands and similar assets) shall be designed and laid out in such a manner so that the benefits may accrue directly to the residents of the development;
b. Access to the open space areas shall be provided by streets or pedestrian accessways for those units comprising the development that to not directly abut the common area;
c. No active recreation areas shall be located at or along the outer perimeter of the development unless such areas can be connected to similar recreation areas in an adjacent residential development. Open space areas designed for passive recreational use or are retained as natural areas may extend to or along the outer perimeter of the development;
d. The common area shall be designed and laid out in such a manner that all land reserved for common use shall maintain proper drainage. The entire common area may, however, be located in a floodplain;
e. In reviewing the common areas of the concept plan, the following shall govern:
(1) The location, size and overall shape of the proposed common area shall be suitable for the purpose for which it is intended;
(2) Those portions of the total common area intended for active recreational purposes shall be of adequate size and shape to permit active recreational use. The active recreation area shall not be established within any woodland, wetland or other natural area that was used to satisfy the qualification criteria under section
22.01 or within any other woodland, wetland or natural area designated by the city to be preserved;
(3) The location, size and shape of the proposed access points, open spaces, recreational areas and proposed accessory structures shall be clearly designated on the plan along with general use patterns and the pedestrian circulation plan to determine that the open space is reasonably located in relation to the units in the development.
22. All streets within the development shall be constructed in accordance with the city engineering standards and all other applicable codes, ordinances and regulations.
D. Permitted densities. In all parcels which have been qualified for cluster development, a total unit count, up to but not exceeding the following limits, may be permitted, the following density per acre is consistent with conventional platted development and offers no density bonus.
R-60 - 4.55 dwelling units per acre* | 60 x 120 = 7,200 |
R-70 - 4.0 dwelling units per acre* | 70 x 120 = 8,400 |
R-80 - 3.5 dwelling units per acre* | 80 x 125 =10,000 |
R-90 - 3.0 dwelling units per acre* | 90 x 130 =11,700 |
R-100 - 2.55 dwelling units per acre* | 100 x 140 =14,000 |
* Density computation includes all roads but excludes that land ineligible for computation under section
22.01(C) (site design requirements). Within any area of the site developed for housing, development shall not exceed eight units per acre.
E. Submittal procedures. Two distinct steps are required to develop a parcel of land under the one family cluster option: qualification of parcel and site plan approval.
1. Qualification of parcel.
a. All applications for qualification of a parcel for one family cluster development shall include the petitioner’s name, address and interest in the property (which supporting documentation of the interest in the property), as well as the name, address and interest of each person having a legal or equitable interest in the property covered by this application. In addition, the petitioner shall include documentation substantiating one or more of the characteristics outlined in paragraph B, qualification of parcel, section 22.01 and shall provide the most recent available (not older than six years) aerial photograph depicting the entire site and provide a concept plan (drawn to scale) showing how the petitioner intends to develop the site. The concept plan shall include the following:
(1) Outline of the property showing the relationship of abutting properties and/or structures;
(2) Placement and basic configuration of buildings;
(4) Preservation/open space areas;
(5) Density calculations and number of units proposed;
(6) Buffering/screening techniques to be used.
This concept plan shall become the basis for the site plan approval process. Substantial departures from the concept plan shall not be approved.
b. Upon receipt of the completed application, the request shall be given to the Planning Commission for scheduling of a public hearing. The Planning Commission shall not act on the request until notice by mail or personal delivery has been sent to the owner of each property for which qualification is being considered and to all persons to whom real property is assessed within 300 feet of the boundaries of the property in question. Said notice shall include the time and place of the public hearing and shall be sent not less than five days before the scheduled public hearing. In addition, not less than 15 days notice of the time and place of such public hearing shall be published in the official newspaper of the city.
c. The Planning Commission shall approve or deny the application based upon the criteria set forth in this section. The Planning Commission must be satisfied with the concept plan submitted in order for the parcel to qualify for development under the one family cluster option. The Planning Commission may impose reasonable conditions upon any approval to ensure that the spirit and intent of this section is upheld. The Planning Commission shall not, however, be required to approve a request even though it satisfies one or more of the criteria outlined in this section if the request does not fulfill the spirit and intent of this development option.
d. Approval of the concept plan by the Planning Commission shall not constitute final site plan approval by the Planning Department but shall be deemed approval of qualification of the site. Approval of the concept plan shall serve as a guide in the preparation and review of the final site plan.
e. Approval of the qualification of the parcel shall remain valid for a period of one year from the date of approval, during which time application for site plan approval must be filed. Extensions of this approval may be granted by the Planning Commission after review.
a. Site plans shall provide the following:
(1) Structural outline (building envelope) of all structures proposed on the site;
(2) Architectural renderings of building facade elevations, typical floor plans and topography shall be drawn at a two foot contour interval. Elevation drawing shall be drawn to scale and need only be a sample of development throughout the site. Where more than one type of structure or design is intended, the sample elevation and corresponding floor plans of each type shall be submitted;
(3) A plan identifying the areas to be dedicated as open space and recreational use showing access, location and any improvements. To assure the permanence of the open space and its continued maintenance, the developer shall provide a proposed open space agreement for review and approval by the City Attorney. The open space agreement must be in a form satisfactory to the city and shall include the following:
(a) The proposed manner of holding title to the open space;
(b) The proposed manner of payment of taxes;
(c) The proposed method of regulating the use of open space;
(d) The proposed method of maintenance of the property and the financing thereof;
(e) Any other facts relating to the legal or practical problems of ownership and maintenance of the open space;
(4) The location of access drives, streets, off-street parking areas, sidewalks and the like;
(5) A landscape plan showing location, extent and type of plantings, screening and the like in accordance with the environmental provisions of Article 24.
b. Approval of a site plan under this section shall be effective for a period of one year from date of approval. If development is not started in this period, the site plan approval shall expire unless an extension is requested, in writing, by the applicant and approved by the city. Any change that represents a significant change from the concept plan approved by the Planning Commission shall be resubmitted to the Planning Commission for review and approval.
(Ord. No. 278-H, § 1, 12-18-90; Ord. No. 278-I, §§ 2-11, 2-5-91; Ord. No. 278-N, §§ 14-18; Ord. No. 278-R, § 10, 8-20-96; Ord. No. 278-X, §§ 7, 8, 4-6-99; Ord. No. 278-Y, §§ 29, 30, 5-16-00; Ord. No. 278-CC, §§ 7, 8, 9, 6-3-03; Ord. No. 278-NN, § 34, 1-6-09)