4904.1 Penthouses and rooftop structures shall be subject to the regulations of Subtitle C, Chapter 15, and to the height and story limitations specified in each zone of this subtitle; provided that public schools shall be permitted a mechanical penthouse to a maximum height of eighteen feet, six inches (18 ft., 6 in.) or the permitted mechanical penthouse height in the zone, whichever is greater.

SOURCE: Final Rulemaking published at 67 DCR 3776 (April 3, 2020); as amended by Final Rulemaking published at 68 DCR 013834 (December 24, 2021).