D.C. Mun. Regs. tit. 11, r. 11-B327
The projections identified in the following table are permitted to encroach into any required height transition plane subject to the following limits:
TABLE B § 329.1: LIMITATIONS ON ENCROACHMENT INTO ANY REQUIRED HEIGHT TRANSITION PLANE
PROJECTING ELEMENT | LIMITATIONS |
Cornices and eaves | Not to exceed 2 ft. |
Sills, leaders, belt courses, and similar ornamental or structural features | Not to exceed 6 in. |
A balcony railing | Not to exceed 4 ft. |
Skylights | Not to exceed 4 ft. |
A chimney, smokestack, or flue | No limit |
Spires | No limit |
Towers, including towers erected from the ground | No limit |
Domes, minarets, pinnacles, pergolas and similar architectural embellishments | No limit |
The projections and structures identified in the following table may encroach into any required buffer transition setback, up to the limits specified:
TABLE B § 329.2: LIMITATIONS ON ENCROACHMENT INTO ANY REQUIRED BUFFER TRANSITION SETBACK
PROJECTING ELEMENT | LIMITATIONS |
Cornices and eaves | Not to exceed 2 ft. |
Sills, leaders, belt courses, and similar ornamental or structural features | Not to exceed 6 in. |
The ordinary projection of skylights, above the bottom of the minimum side setback | Shall be placed so as not to obstruct light and ventilation |
Awnings serving a window, porch, or door | Not to exceed 40 in. |
A chimney, smokestack, or flue | Not to exceed 2 ft. |
A self-contained air conditioner | Not to exceed 2 ft. |
Building components or appurtenances dedicated to the environmental sustainability of the building | Not to exceed 4 ft. |
A structure, including a building | Must be less than 4 ft. in height above the grade at any point. Any railing required by the D.C. Construction Codes Supplement, 12 DCMR, shall not be included in the measurement of the structure's height. |
A fence or retaining wall | Must be constructed in accordance with the D.C. Construction Codes Supplement, 12 DCMR |
Stairs and associated D.C. Construction Code Supplement required guard rails | Must lead to the first story of the building located entirely above grade, or to a story below grade |
An antenna | Must comply with all other requirements of this title |
D.C. Mun. Regs. tit. 11, r. 11-B327