2906.1 The provisions of § 411 shall apply to penthouses in the USN Zone District.

2906.2 A penthouse may be erected to a height in excess of that permitted in § 2905 but shall not exceed the height, as measured from the surface of the roof upon which the penthouse is located, in the following table:

ZONE ISTRICT	MAXIMUM PENTHOUSE HEIGHT	MAXIMUM PENTHOUSE STORIES
USN	20 ft.	1 plus mezzanine; second story permitted for penthouse mechanical space

SOURCE: Final Rulemaking published at 58 DCR 4788, 4797 (June 3, 2011); as amended by Final Rulemaking published at 63 DCR 390 (January 8, 2016).