Except as otherwise limited in this Chapter, height and number of stories permitted for a penthouse or rooftop structure shall be as prescribed in the development standards for the applicable zone.
The height and number of stories permitted for a penthouse or rooftop structure for a building constructed pursuant to a planned unit development (PUD) shall be as prescribed for the PUD standards for the applicable zone, pursuant to Subtitle X, Chapter 3.
Pursuant to § 5 of the Height Act, a penthouse or rooftop structure may be erected to a height in excess of that permitted therein if authorized by the Mayor or his or her designee and subject to the setback and other restrictions stated in the Act.
D.C. Mun. Regs. tit. 11, r. 11-C1502