A. Nonbuildable areas and land set aside for nonresidential land uses are subtracted from the gross area of the site to determine the net usable area of the site. For the purposes of this section, nonbuildable areas do not include public or private streets or driveways within a planning area.

B. The number of acres of the net usable area of the planning area is multiplied by the residential densities allowed in the official Lakeland plan map to produce the maximum number of dwelling units. Any fractions may be rounded up to the nearest whole number as long as the densities as outlined in subsection C of this section are not exceeded.

C. Residential densities within each planning area allowed by the official Lakeland plan map are as follows: