DC's zoning code (11 DCMR) limits lot coverage and floor area ratio (FAR) by zone district. Low-density residential zones allow 40-60% lot coverage, while higher-density and commercial zones allow more. Green area (pervious surface) requirements also apply.
Under 11 DCMR, lot coverage limits vary by zone. R-1 (detached houses) zones allow approximately 40% lot coverage and 0.9 FAR. R-2 zones allow approximately 50% coverage. RF (row house) zones allow up to 60% coverage with higher FAR. Mixed-use zones allow 60-80% coverage depending on the specific zone designation. Green area requirements mandate that a percentage of each lot remain as permeable surface: typically 30-50% in residential zones. The zoning code also regulates lot occupancy (the percentage of the lot that can be occupied by buildings at ground level). Accessory structures, decks, and porches count toward lot coverage calculations. Variances require BZA approval.
Exceeding lot coverage limits will result in permit denial. Existing structures that exceed limits after code changes are legally nonconforming but cannot expand further. Unpermitted excess coverage may require demolition.
Washington, DC
Washington DC does not regulate lawn ornaments on private property through a specific ordinance. Statuary, religious displays, and decorative landscape eleme...
Washington, DC
Washington DC has no city ordinance specifically regulating inflatable holiday displays on private property. The primary city concerns are (1) public-space e...
Washington, DC
The District of Columbia does not impose specific install-by or take-down-by dates for holiday lights on private property. City-wide regulation is limited to...
Washington, DC
Washington DC requires Department of Buildings (DOB) permits for built-in outdoor kitchens that involve gas line installation, electrical work, plumbing, or ...
Washington, DC
Washington DC has no smoker-specific ordinance, but smokers and wood-fired ovens are open-flame cooking devices subject to IFC Section 308.1.4 in multi-famil...
Washington, DC
Washington DC adopts the International Fire Code (IFC) as the DC Fire Code (12-G DCMR). IFC Section 308.1.4 prohibits charcoal and other open-flame cooking d...
See how Washington's lot coverage limits rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.