No side yard is required for a principal building other than a detached single dwelling unit or semi-detached single dwelling unit; however, if a side yard is provided, it shall be at least two inches (2 in.) wide for each one foot (1 ft.) of height of building, but no less than five feet (5 ft.).
A side yard for a detached single dwelling unit or semi-detached single dwelling unit shall be a minimum of eight feet (8 ft.).
Any portion of a building set back from the side lot line shall be considered a side yard and not a court.
D.C. Mun. Regs. tit. 11, r. 11-G706