The base number of lots is defined as the lot yield based on the implementation of the requirements of the underlying zoning district. The base number of lots is the starting point from which extra lots may be permitted if non-regulatory or bonus open space (see Chapter 12 for definition) is provided and other design requirements are met.
The applicant shall choose one (1) of the following methods for calculating the base number of lots:
(A) The base number of lots may be determined by taking ninety (90) percent of the potential developable area of the site and multiplying by the maximum density (based on lot area requirements) for the underlying zoning district. The purpose of reducing the potential developable acreage by ten (10) percent is to account for the approximate area that would be allocated to roadways within a conventional subdivision. "Potential developable area" within this Section is defined as the total land area of the site excluding all regulatory floodplains, streetscapes and other required areas (see Chapter 7: Development and Design Standards). For sites that contain and/or are adjacent to the American Tobacco Trail, a buffer of at least fifty (50) feet in width is required. This minimum buffer width is considered regulatory/required area, and shall not be included in the calculation of potential developable area.
Example: Site A
Total Acres: One hundred (100)
Acres in regulated/protected areas: Twenty (20)
Potential Developable area including roadways: One hundred (100) - Twenty (20) = Eighty (80)
Calculated Developable area (Eighty (80) acres) x Ninety (90) percent = Seventy-two (72) acres
Seventy-two (72) acres x 1.09 dwelling units per acre (density permitted in R-40) = Seventy-Eight (78) base number of lots
(B) The base number of lots may be determined based on a yield plan for the site, whereby the applicant presents a rough or sketch conventional subdivision development plan that fully complies with the development requirements of the underlying zoning for the site.