D.C. Mun. Regs. tit. 11, r. 11-406
Where a court is provided in a Residence District, the court shall have the minimum dimensions set forth in the following table:
ZONE DISTRICT AND STRUCTURE | MINIMUM WIDTH OF OPEN COURT | MINIMUM WIDTH AND AREA OF CLOSED COURT |
R-1-A, R-1-B, R-2, R-3, R-4, R-5-A One-family dwelling R-1-A, R-1-B, R-2, R-3, R-4, R-5-A All other structures R-5-B One-family dwelling R-5-B Hotel R-5-B All other structures R-5-C, R-5-D One-family dwelling R-5-C, R-5-D All other structures R-5-E One-family dwelling R-5-E Hotel R-5-E All other structures | 4 in. per foot of height of court, but not less than 6 ft. 4 in. per foot of height of court, but not less than 10 ft. 4 in. per foot of height of court, but not less than 6 ft. 3 in. per foot of height of court, but not less than 10 ft. 4 in. per foot of height of court, but not less than 10 ft. 3 in. per foot of height of court, but not less than 6 ft 3 in, per foot of height of court, but not less than 10 ft. 3 in. per foot of height of but not less than 6 ft. 21/2 in. per foot of height of court, but not less than 6 ft. 3 in. per foot of height of court, but not less than 10 ft. | Width: 4 in. per foot of height of court, but not less than 5 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in. per foot of height of court, but not less 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft. Width: 4 in. per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in. per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in. per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in. per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 Width: 4 in. per foot of height of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height or court, but not less than 350 ft.² Width: 21/2 in. per foot of height of court, but not less than 12 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 250 ft.2 Width: 4 in. per foot of court, but not less than 15 ft. Area: Twice the square of the required width of court dimension based on the height of court, but not less than 350 ft.2 |
No required opening for the admission of light and natural ventilation shall open onto a court niche where the ratio between the width of court niche and the depth of court niche is less than two to one (2/1).
No portion of a court niche shall be farther than three feet (3 ft.) from a point where the court niche is less than three feet (3 ft.) wide.
In the case of an alteration affecting the amount of light and ventilation required in an existing building in a Residence District by other municipal law or regulation, no legally required window shall be permitted to open onto a court that does not comply with the dimensions given in § 406.1.
D.C. Mun. Regs. tit. 11, r. 11-406