14 DCMR § 14-507
VENTILATION OF BATHROOMS
Operative Text
507.1 Each bathroom shall be naturally or mechanically ventilated, at least equivalent to the requirements of this section. 507.2 Natural ventilation shall be provided by openings, other than a door, directly to the outside, the openable area of which is at least equal to five percent (5%) of the floor area of the room served. 507.3 No opening for ventilation of a bathroom shall contain less than two square feet (2 ft.2). 507.4 If mechanical ventilation is used, it shall provide for each bathroom with a single water closet outside air in a minimum quantity of one and one half cubic feet per minute per square foot of floor area (1½ ft.3/min./ft.2), with no recirculation permitted. 507.5 A bathroom having more than one water closet shall be provided with a minimum outside air quantity of two and one half cubic feet per minute per square foot of floor area (2½ ft.3/min./ft.2), with no recirculation permitted. 507.6 A mechanically ventilated bathroom shall not serve or open into any area that opens on, or is served by, a bathroom that is not similarly ventilated.
Under D.C. Mun. Regs. tit. 14 et seq. § 14-507, every bathroom in a residential dwelling must have adequate ventilation, achieved either through natural openings to the outside or through a mechanical system. Natural ventilation requires openings—other than doors—totaling at least 5% of the bathroom's floor area, with a minimum of 2 square feet. Mechanical systems must supply fresh outside air at specified rates depending on the number of water closets, and recirculation of air is not permitted under any mechanical setup.
Plain English — not legal advice.
Property owners and managers operating in the District of Columbia should ensure that every bathroom meets the ventilation standards set out in D.C. Mun. Regs. tit. 14 et seq. § 14-507. Compliant operators typically verify that natural ventilation openings meet both the 5% floor-area threshold and the 2-square-foot minimum, or that mechanical systems deliver the required outside-air flow rates—1.5 cubic feet per minute per square foot for single-water-closet bathrooms and 2.5 for those with more than one. Operators also confirm that mechanically ventilated bathrooms do not open into or serve adjacent areas that lack equivalent ventilation.
General guidance for property managers — not legal advice for your specific situation. Consult an attorney for advice on your case.
Tenants in the District of Columbia have a right to bathrooms that meet the ventilation standards established by D.C. Mun. Regs. tit. 14 et seq. § 14-507, which requires either adequate natural openings or a properly functioning mechanical system supplying fresh outside air. If a bathroom appears to lack sufficient ventilation—such as having no operable window or a non-functioning exhaust fan—tenants may document the condition and consider filing a complaint with the District's housing inspection authorities. Tenant-rights organizations in D.C. can provide general information about available enforcement paths, including how to raise a housing code violation.
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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