7090.1 Gross floor area shall be as defined in Subtitle B, except that for purposes of calculating off-street parking requirements:

(a) In all zones, gross floor area shall not include floor area devoted to off-street parking or loading facilities, including aisles, ramps, and maneuvering space or space devoted exclusively to bicycle storage or support (lockers and showers) facilities;

(b) In all zones, gross floor area shall include penthouse habitable space except that recreation space for residents or tenants of the building or other ancillary space associated with a rooftop deck shall not be included;

(c) In the R, RF, RA, and MU-11 through MU-14 zones, gross floor area shall include cellar floor area devoted to uses within the Government, Local use;

(d) In the MU-3, MU-4, MU-7, NMU-3, NMU-4, NMU-7, ARTS-1, ARTS-3, PDR-1, and PDR-4 zones, gross floor area shall include:

(1) Animal sales, care and boarding;

(2) Arts, design and creation;

(3) Chancery;

(4) Eating and drinking establishments;

(5) Firearm sales;

(6) Medical care;

(7) Office;

(8) Retail; and

(9) Service, general and financial; and

(e) In the PDR-2 and PDR-3 zones, gross floor area shall include the cellar floor area devoted to uses within the Office and Chancery use groups.

7090.2 When an initial amount of floor area or number of dwelling units is exempted, that amount or number is

subtracted from the total before the minimum parking requirement is calculated.

7090.3 Calculations of parking spaces that result in a fractional number of one-half (0.5) or more shall be rounded up to the next whole number. Any fractional result of less than one-half (0.5) shall be rounded down to the previous whole number.

7090.4 The number of teachers or employees shall be computed on the basis of the greatest number of persons to be employed at any one period during the day or night, including persons having both full-time and part-time employment.

SOURCE: Final Rulemaking published at 63 DCR 2447, 2712 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 63 DCR 10620 (August 19, 2016); as amended by Final Rulemaking published at 63 DCR 10932 (August 26, 2016); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023).