D.C. Mun. Regs. tit. 11, § 1203
1203.1 Except as specified in § 1203.2 and in chapters 20 through 25 of this title, the height of buildings or structures in the CAP Overlay District shall not exceed forty feet (40 ft.) or three (3) stories in height.
1203.2 The height of buildings or structures as specified in § 1203.1 may be exceeded in the following instances:
(a) A spire, tower, dome, minaret, pinnacle, or penthouse over elevator shaft may be erected to a height in excess of that authorized in § 1203.1; and
(b) If erected or enlarged as provided in § 411, housing for mechanical equipment or a stairway or elevator penthouse may be erected to a height in excess of that authorized in the zone district in which located; provided, that the housing is set back from all lot lines of the lot upon which the structure is located a distance equal to its height above the roof of the top story. In any case, a roof structure shall not exceed ten feet (10 ft.) in height above the roof upon which it is located.
1203.3 Except as specified in chapters 20 through 25 of this title, the maximum permitted floor area ratio of a building or structure in the CAP Overlay District shall not exceed one and eight-tenths (1.8).
1203.4 All provisions of § 411 shall also apply to roof structures in the CAP Overlay District. The gross floor area of roof structures permitted under this subsection shall not be counted in determining the amount of off-street parking as required elsewhere in this title.
SOURCE: Final Rulemaking published at 32 DCR 3022, 3026 (May 31, 1985); as amended by Final Rulemaking published at 47 DCR 9741-43 (December 8, 2000), incorporating by reference the text of Proposed Rulemaking published at 47 DCR 8335, 8443 (October 20, 2000).