D.C. Mun. Regs. tit. 11, § 935
935.1 Where a court is provided in a Waterfront District, the court shall have the following minimum dimensions:
| STRUCTURE | MINIMUM WIDTH OF OPEN COURT | MINIMUM WIDTH AND AREA OF CLOSED COURT |
|---|---|---|
| Residential building | 4 in. per foot of height; Minimum: 10 ft. | Width: 4 in. per foot of height; Minimum: 15 ft. Area: 2 x square of required width; Minimum: 350 ft.2 |
| Hotel and but | 3 in. per foot of height; Minimum: 10 ft. | Same as above |
| Other structure | 21/2 in. per foot of height; Minimum: 6 ft. | Width: 21/2 in. per foot of height; Area: 2 x square of required width; Minimum: 250 ft.2 |
935.2 In the case of a building devoted to both residential and nonresidential uses, the minimum width and area of a court shall be computed as follows:
935.3 For the purposes of this section, "residential building" shall include dwellings, flats, multiple dwellings, rooming and boarding houses, hospitals, and community-based residential facilities.
935.4 No required opening for the admission of light and natural ventilation shall open onto a court niche where the ratio between the width and depth of the court niche is less than two to one (2:1).
935.5 No portion of a court niche shall be further than three feet (3 ft.) from a point where the court niche is less than three feet (3 ft.) wide.
SOURCE: § 4406.4 of the Zoning Regulations, effective May 12, 1958; as amended by Final Rulemaking published at 31 DCR 6585, 6586 (December 28, 1984); and Final Rulemaking published at 47 DCR 9741-43 (December 8, 2000), incorporating by reference the text of Proposed Rulemaking published at 47 DCR 8335, 8435 (October 20, 2000).