In the R-1A/FH, R-1B/FH, and R-2/FH zones, the minimum side yard requirement for all buildings, accessory buildings, or additions to buildings shall be twenty-four feet (24 ft.) in the aggregate, with no single side yard having a width of less than eight feet (8 ft.).
D.C. Mun. Regs. tit. 11, r. 11-D403