205. PENTHOUSE AND ROOFTOP STRUCTURE

205 PENTHOUSE AND ROOFTOP STRUCTURE 205.1 The maximum permitted height of a penthouse or rooftop structure and number of stories, except as limited by Subtitle C § 1501 on the roof of a single household dwelling or flat, shall be as set forth in the following table: TABLE F § 205.1: MAXIMUM PENTHOUSE AND ROOFTOP STRUCTURE HEIGHT AND NUMBER OF STORIES Zones Maximum Height Maximum Number of Stories RA-1 12 ft. 1 RA-2 12 ft., except 15 ft. for penthouse mechanical space 1; Second story permitted for penthouse mechanical space RA-3 12 ft., except 18 ft. 6 in. for penthouse mechanical space 1; Second story permitted for penthouse mechanical space RA-4 20 ft. 1 plus mezzanine; Second story permitted for penthouse mechanical space RA-5 20 ft. 1 plus mezzanine; Second story permitted for penthouse mechanical space 205.2 Notwithstanding Subtitle F § 205.1, in any of the RA-1 and RA-2 zones, a mechanical penthouse or rooftop structure with a maximum height of eighteen feet, six inches, (18 ft. 6 in.) shall be permitted on a non-residential building constructed pursuant to Subtitle F §§ 203.3 through 203.7. SOURCE: Final Rulemaking published at 70 DCR 011297 (August 25, 2023); as amended by Final Rulemaking published at 73 DCR 009981 (July 10, 2026). District of Columbia Municipal Regulations Zoning Regulations of 2016: Residential Apartment (RA) Zones 11-F DCMR § 205