Where part or all of the off-street parking spaces for a multiple dwelling, as required in Article XX of this chapter, are provided within the principal building, the total number of rooms permitted in § 370-80 in this article applicable to the RM-2 District may be increased by a maximum of 20% in accordance with the following formula:

The additional number of off-street parking spaces required to service the added dwelling units, as permitted in Subsection B(1) above, shall be provided within the principal building.

In no instance shall be dwelling unit density exceed 174 rooms per acre (as defined herein).

In no instance shall this option be exercised for multiple-family dwellings of less than three stories in height.

The irregular or dimensionally restricted shape of the parcel makes it impractical or unconventional to develop the land under the normal subdivision approach because it would:

Development of the site under the normal subdivision approach would create unconventional lot shapes, making them difficult to develop, or would be so shaped that portions of the lot would be left unused, creating potential maintenance problems.

Development under the normal subdivision approach would destroy or substantially diminish a natural asset of environmental significance, which could be more fully preserved under the cluster housing option.

The Planning Commission, upon review of alternative development layouts, finds that development under the cluster housing option will result in a more orderly and appropriate use of the land, by showing a better relationship between dwelling units on site and adjacent land use off site, will provide for a more efficient and functional traffic circulation system and will provide for more pleasing and more extensive greenbelt areas than could be achieved under the normal subdivision approach.

The Planning Commission may, at its discretion, vary the thoroughfare frontage requirement and permit access to a local residential street when the cluster housing development is on property that abuts a multiple-family or a nonresidential zoning district and that abutting property has frontage on a major or secondary thoroughfare or on a nonresidential-oriented street.

The attaching of one-family homes shall be permitted when said homes are attached through a common party wall which does not have over 50% of its wall in common with an abutting dwelling wall; by means of an architectural wall detail which does not form interior room space or through a common party wall in only the garage portion of adjacent structures, there being no common party wall relationship permitted through any other portion of the residential unit.

The detaching of one-family homes within clusters shall be permitted, provided said homes shall be spaced not less than six feet apart when opposing dwelling unit walls contain no openings, and not less than 10 feet apart when opposing dwelling unit walls contain openings. The distance between opposing garage walls within a cluster shall meet local fire codes, except that in no case shall said walls be less than six feet apart.

The maximum number of attached or detached homes in a cluster, as set forth above, shall be subject to review by the Planning Commission but in no case shall a cluster contain more than three homes.

Front yard. A minimum 25 feet of front yard setback shall be provided between the front wall and sidewall of a building and the front property line of the development site.

Exterior side yard (street side, side yard). A minimum setback equal to the minimum front yard setback requirement of this subsection shall be provided between the front or sidewall of a building on the development site and any bordering street.

Interior side yard. A minimum 10 feet of side yard setback shall be provided between the sidewall of a dwelling building on the development site and the site yard area of an abutting single-family lot. When the dwelling building on the development site is attached to another dwelling building, the side yard setback shall be increased to a minimum of 15 feet.

Rear yard. A minimum 35 feet of rear yard setback shall be provided between the rear wall of a dwelling building and the rear yard area of an abutting single-family lot. A minimum 20 feet of setback may be provided when the sidewall of a dwelling building on the development site is opposite the rear yard area of an abutting single-family lot.

Except as otherwise set forth in this subsection, a dwelling building shall maintain a side or rear wall orientation to the front lot line of the development site. When the rear wall of a dwelling building on the development site shall face a street bordering the development site, 20 feet of rear yard area shall be provided in addition to the minimum front yard setback requirement set forth in Subsection D of this section, except when there are homes on abutting lots on both sides of the development site, or on lots directly across the street from the development site and they face into the same street that fronts the development site, the dwelling building or buildings nearest the front lot line of the development site shall maintain a front wall orientation to the front property line.

When the front or a side wall of a dwelling building shall be opposite an interior street or service drive within the development site, the dwelling building shall maintain a minimum setback of 20 feet, except when the wall contains a garage opening, a minimum setback of 23 feet shall be provided.

Except as otherwise permitted in this subsection, when the rear wall of a dwelling unit shall face the front property line of the development site, as permitted in Subsection E of this section, an architectural masonry screen wall structure with an inverted masonry vee cap shall be provided along the minimum required front yard setback line of the development site. The exterior face of the screen wall structure shall consist of face brick, as defined in this chapter, or real or cultured stone materials, except in place of a masonry wall, the Planning Commission may allow a six-foot-high decorative wood fence.

The screening device shall be opaque and shall be six feet high and, except where otherwise prohibited in this chapter, shall extend across the entire width of the development site's frontage. The front yard between the screening device and the front property line shall consist of a landscaped lawn panel with informal groupings of accepted landscape planting materials.

Landscaping plan. A landscape plan prepared by a registered landscape architect shall be submitted. The seal or registration of the landscape architect shall appear on the plan. The landscape plan shall also show the landscaping treatment of all open space areas, any landscape screening areas, and any detail planting areas next to driveways, streets or service drives, or along the perimeter walls of any dwelling buildings. The landscape plan shall include a list of all planting materials shown on the landscape plan, including their botanical as well as their common names, their size or spread at the time of planting, and their location on the site. A statement detailing the manner in which all landscaping will be maintained shall appear on the landscape plan. The applicable site landscaping standards set forth in Article XXII in this chapter shall be followed.

Floor plans and exterior building wall elevation drawings.

Existing conditions. An existing conditions drawing of the development site, including a legal description of the property or properties, and showing all property lines with dimensions, topographic contour-lines drawn at one-foot intervals, any on-site utility easements, tree cover, and the footprint (building envelope) of any existing buildings or structures on the property, and the center line of any bordering streets.

The maximum number of individual single-family detached dwellings per acre shall not exceed the dwelling unit density level of the One-Family Residential Zoning District in which the site is located.

An area at least equal to the minimum lot area requirement of the zoning district in which the site is located shall be provided for each dwelling or condominium unit. This area may be called the "limited common element," as defined in this chapter.

Setbacks equal to the minimum building setback requirements of the zoning district in which the site is located shall be provided for each dwelling or condominium unit. Each setback shall extend from the applicable wall of the dwelling or condominium unit to the corresponding limited common element line.

All streets shall be public streets in public rights-of-way; all such streets and rights-of-way shall be designed and constructed to the City's applicable public street and road rights-of-way standards.

All utilities shall be provided and constructed to applicable standards and shall be located in appropriate utility easements.

The maximum number of stories and the maximum building height limitations of the zoning district in which the site is located shall be met.

At least the minimum applicable square feet of floor area shall be provided, as required in this chapter, for each single-family detached dwelling or condominium unit.

Any detached accessory building or structure shall comply with the applicable standards of this chapter. All such setbacks shall be measured from the applicable lot or limited common element line.