(A) Maximum building size. No building or any addition thereto shall be constructed or structurally altered on a lot in any residence district if, as a result thereof, the floor area of all buildings on the lot shall exceed the maximum floor area computed as follows.
(1) For all buildings constructed, or for which a permit for the initial construction or substantial alteration thereof was issued, on or before October 22, 2005.
(a) Except as hereinafter provided, the maximum floor area applicable to all lots shall be:
1,200 + (.24 x lot area)
(b) Notwithstanding the foregoing, the maximum floor area applicable to all lots shall in no event exceed:
.45 x lot area
(2) For all buildings constructed or substantially altered pursuant to a permit issued after October 22, 2005.
(a) Except as hereinafter provided, the maximum floor area applicable to all lots shall be:
1,200 + (0.21 x lot area)
(b) Notwithstanding the foregoing, the maximum floor area applicable to all lots shall in no event exceed:
0.42 x lot area
(3) Notwithstanding paragraphs (A)(1) and (A)(2) above, for single-family attached dwellings authorized by special use, the maximum floor area shall be:
0.575 x lot area
(B) Maximum building coverage. No building or any addition thereto shall be constructed or structurally altered on a lot in any residence district if, as a result thereof, the aggregate coverage of the lot area by buildings shall exceed the maximum building coverage computed as follows:
(1) If the lot area is less than or equal to 5,715 square feet, the maximum building coverage shall be:
.30 x lot area
(2) If the lot area is greater than 5,715 but less than 20,000 square feet, the maximum building coverage shall be:
800 + (.16 x lot area)
(3) If the lot area is greater than or equal to 20,000 square feet, the maximum building coverage shall be:
.20 x lot area
(4) Notwithstanding the foregoing, the maximum building coverage for a lot, regardless of the lot area thereof, shall be reduced by the amount, if any, by which the aggregate coverage of the lot area by impervious surfaces, other than buildings, exceeds 25% of the lot area.
(5) Notwithstanding the foregoing provisions of this subsection, for single-family attached dwellings approved by special use, the maximum building coverage shall be:
325 + (.30 x lot area)
(C) Other impervious surfaces. No sidewalk, driveway, pavement, patio, open porch or deck, or similar structure, or other structure or impervious surface, other than a building, shall be constructed or installed if, as a result thereof, the aggregate coverage of the lot area by all impervious surfaces shall exceed the lesser of the amount provided in paragraphs (C)(1) or (C)(2) below for single-family dwellings, or paragraph(C)(3) below for single-family attached dwellings:
(1) Twenty-five percent of the lot area, plus the amount, if any, by which the maximum building coverage for the lot exceeds the actual coverage of the lot area that is attributable to buildings;
(2) Twenty-five percent of the lot area, less the amount, if any, by which the actual coverage of the lot area that is attributable to buildings exceeds the maximum building coverage; or
(3) 100 + (.35 x lot area).
(Ord. 577, passed 4-14-1969; Ord. 946, passed 10-11-2005; Ord. 973, passed 2-12-2007; Ord. 976, passed 4-9-2007; Ord. 987, passed 10-9-2007)