The total solar-ready zone shall be not less than 300 square feet (27.87 m2) exclusive of mandatory access or set back areas as required by the Fire Code. Residential buildings with a total floor area less than or equal to 2,000 square feet (185.8 m) per dwelling shall have a solar-ready zone of not less than 150 square feet (13.94 m2). The solar-ready zone shall be composed of areas not less than 5 feet (1524 mm) in width and not less than 80 square feet (7.44 m2) exclusive of access or set back areas as required by the Fire Code.
D.C. Mun. Regs. tit. 12, 12-IB103.3