[Ord. 253. Passed 2-16-1988. Ord. 377. Passed 9-25-2000]
In order to provide for increased preservation of open space, a developer of a tract in an "AA-1" Residential District may request as a conditional use, in accordance with Section
1298.07, that the tract be permitted to be developed at a higher density, if there is preservation of open space in addition to that required by Section
1256.09. All developments under these density bonus provisions shall meet the following requirements and shall comply with all applicable requirements for cluster developments provided in this chapter, and all common open space shall comply with Section
1256.11.
(a) Use Regulations. In a cluster development with density bonus, single-family detached residential dwellings, open space and recreational areas and structures shall be permitted. All residential uses shall be subject to the general regulations applicable to an "AA-1" Residential District, except as specifically modified by Sections
1256.09 through
1256.11 and this section.
(b) Density Regulations. The total number of dwelling units which shall be permitted in a cluster development with density bonus shall be contingent upon the percentage of the gross area of the tract reserved for common open space uses in addition to all undevelopable areas. For every 5% of the gross area of the tract reserved for common open space above the minimum required under Section
1256.09(c) (which consists of ten percent of the gross area of the tract plus all undevelopable land), a corresponding five-percent increase shall be allowed in the density as set forth in Section
1256.10(b) up to the maximum of .75 dwelling units per developable acre. The maximum density computed by this method, as set forth in the table below, shall in all cases govern density.
| Minimum Open Space | Maximum Density in Dwelling Units Per Developable Acre |
|---|
| 15% of the gross area of the tract plus all undevelopable area | .55 |
| 20% of the gross area of the tract plus all undevelopable area | .60 |
| 25% of the gross area of the tract plus all undevelopable area | .65 |
| 30% of the gross area of the tract plus all undevelopable area | .70 |
| 35% of the gross area of the tract plus all undevelopable area. | .75 |
(c) Development Standards. The minimum area of any lot and the minimum dimensions of lot width at the building line, front yard, side yards and rear yard which shall be permitted in a cluster development with density bonus shall be contingent upon the percentage of the gross area of the tract reserved for common open space uses in addition to all undevelopable areas. For every 5% of the gross area of the tract reserved for common open space above the minimum required under Section
1256.09(c) (which consists of ten percent of the gross area of the tract plus all undevelopable land) to be reserved for common open space, to a maximum of 35% of the gross area of the tract plus all undevelopable area, a corresponding decrease shall be allowed in the minimum area of any lot and the minimum dimensions for lot width at the building line, front yard, side yards and rear yard as set forth in Section
1256.10. The yard required by Section
1256.10(e)(4) shall not be reduced under this section.
(d) Historic or Cultural Resources. In a cluster development with density bonus under this section, as a conditional use, the maximum permitted tract density may be increased by 5% of the 0.50 dwelling unit per developable acre, in addition to the increase set forth in subsection
(b) hereof, where the tract contains one or more Township historic or cultural resources, and such Township historic or cultural resources shall be preserved as a part of the development plan.
| A Township historic or cultural resource shall be defined as a site or structure listed in the National Register of Historic Places, the Pennsylvania Historic Resources Survey, the Montgomery County Inventory of Historic and Cultural Resources, a listing of historic and cultural resources compiled by the Board of Supervisors or the Planning Commission, or other appropriate documentation, or a site or structure seeking listing as a historic resource from any or all of the above listings. |