205.1 The maximum permitted height of a penthouse or rooftop structure shall be as set forth in the following table:

TABLE J § 205.1: MAXIMUM PENTHOUSE AND ROOFTOP STRUCTURE HEIGHT AND NUMBER OF STORIES

Zones	Maximum Height	Maximum Number of Stories
PDR-1	12 ft., except 15 ft. for penthouse mechanical space	1; Second story permitted for penthouse mechanical space
PDR-2	12 ft., except 18 ft. 6 in. for penthouse mechanical space	1; Second story permitted for penthouse mechanical space
PDR-3 PDR-4	20 ft.	1 plus mezzanine; Second story permitted for penthouse mechanical space

SOURCE: Final Rulemaking published at 63 DCR 2447, 3163 (March 4, 2016 – Part 2); as amended by Final Rulemaking published at 70 DCR 011297 (August 25, 2023).