A mechanical penthouse or rooftop structure with a maximum height of fifteen feet (15 ft.) and one (1) story shall be permitted on a place of worship, public recreation and community center, or an institutional building.
A penthouse or rooftop structure permitted by this section shall contain no form of habitable space, other than ancillary space associated with a rooftop deck.
D.C. Mun. Regs. tit. 11, r. 11-D503