14 DCMR § 14-404
HABITABLE ROOMS PARTIALLY BELOW GROUND
Operative Text
404.1 Any room with more than fifty percent (50%) of any exterior wall area from floor to ceiling below ground level (using average level along each exterior wall) shall not be used as a habitable room, except as otherwise provided in this section. 404.2 In a building in existence prior to June 9, 1960, where there is an existing open well or areaway which is three feet (3 ft.) or more in width immediately adjacent to any exterior wall, that wall shall be considered above ground level for the length and depth of the open well or areaway. 404.3 Whenever any building in existence prior to the effective date of this amendment (June 9, 1960) is altered to conform to the requirements of this section, the newly constructed court or areaway immediately adjacent to any exterior wall shall be four feet (4 ft.) or more in width and of a depth necessary so that one-half (1/2) the height of all portions of any exterior wall of the room, measured from floor to ceiling, shall be above the ground immediately adjacent to the newly constructed court or areaway. 404.4 Whenever any existing building is altered to conform to the requirements of this section, a permit shall be obtained from the Director, and all alterations must conform in other respects to the applicable requirements of the Building Code of the District of Columbia (Title 12, DCMR). 404.5 Areaways constructed on buildings erected after the effective date of this amendment (June 9, 1960) shall comply fully with the applicable requirements of the Building Code (Title 12, DCMR) and the Zoning Regulations (Title 11, DCMR).
Under D.C. Mun. Regs. tit. 14 et seq. § 14-404, a room where more than half of any exterior wall's floor-to-ceiling area sits below ground cannot be used as a habitable room, with limited exceptions for older buildings that have qualifying open wells or areaways. Buildings constructed before June 9, 1960, may qualify for modified standards if an adjacent open well or areaway meets specific width and depth requirements. Any structural alterations made to bring a building into compliance must follow District of Columbia Building Code requirements and require a permit from the Director.
Plain English — not legal advice.
Property owners and managers operating under D.C. Mun. Regs. tit. 14 et seq. § 14-404 generally ensure that no below-grade space is rented or advertised as a habitable room unless it meets the provision's specific exceptions for pre-1960 buildings with qualifying areaways. Compliant operators typically obtain the required permit from the Director before undertaking any structural alterations intended to bring a partially below-grade space into conformance. When constructing or modifying areaways on buildings erected after June 9, 1960, operators generally verify that the work satisfies both the D.C. Building Code (Title 12, DCMR) and Zoning Regulations (Title 11, DCMR).
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
D.C. Mun. Regs. tit. 14 et seq. § 14-404 establishes that tenants have a right not to be housed in a below-grade room that fails the provision's habitability standards, unless the space qualifies under one of the stated exceptions for older buildings. If a tenant believes their unit may violate this provision, general enforcement paths include filing a complaint with the District of Columbia's housing inspection authorities or raising the violation as a defense in relevant housing proceedings. Tenant-rights organizations in the District can help residents understand whether a particular space may fall under this rule and what options are generally available.
General guidance for tenants — not legal advice for your specific situation. Consult a tenant-rights organization or attorney for advice on your case.
Generated October 13, 2026 — auto-generated, not yet human-reviewed. See /transparency for methodology.
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