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Zoning Guide

ADU Rules in Anacostia, Washington DC

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ADU Rules in Anacostia, Washington DC

Anacostia is one of DC's oldest neighborhoods, located in the southeastern part of the city east of the Anacostia River (Ward 8). It is a historic African American community with significant cultural heritage and a long history. DC Zoning Regulations (Title 11 DCMR) govern ADUs district-wide — there are no neighborhood-specific ADU rules.

DC-Wide ADU Framework

DC Zoning Regulations (comprehensively revised 2016) govern accessory apartments across all DC neighborhoods. The zone designation for your specific property determines the applicable standards.

Permitted ADU Types

  • Accessory Apartment: Interior conversion of existing residential building
  • Detached Accessory Dwelling: Standalone structure on the lot
  • Basement Conversion: Below-grade unit with separate entrance

Zoning Context

Anacostia includes R-1 through R-3 (residential), RF (Row House), and some mixed-use zones. Verify your parcel's zone at DC's Interactive Zoning Map.

Size Limits

  • Generally limited to 800 sq ft or percentage of primary dwelling
  • Interior conversions limited to the existing footprint

Setbacks

Per applicable zone:

  • Front: Per base zone
  • Side: 3–5 feet minimum
  • Rear: 12–20 feet minimum

Historic District

Anacostia has the Anacostia Historic District, one of DC's oldest historic districts. Properties within the historic overlay require review by the DC Historic Preservation Office.

Flood Zone Considerations

Areas near the Anacostia River may be in FEMA flood zones. Verify flood zone status before planning ground-floor or basement ADUs.

Permit Process

  1. Check zoning: Confirm zone via DC Interactive Zoning Map
  2. Historic review: If in Anacostia Historic District
  3. Flood zone check: If near waterways
  4. Submit permit: DC Department of Buildings
  5. Inspections and CO: Required before occupancy

Contact

DC Department of Buildings 1100 4th Street SW, Washington, DC 20024 Phone: (202) 671-3500 Website: dob.dc.gov

DC Office of Zoning 441 4th Street NW, Suite 200-S, Washington, DC 20001 Phone: (202) 727-6311 Website: dcoz.dc.gov

Disclaimer: Verify current DC Zoning Regulations with the DC Office of Zoning before starting any project.

More about Anacostia Zoning

Sources

  1. DC Zoning Regulations — Title 11 DCMR·dcoz.dc.gov·Accessed 2026-04-07·Direct link
  2. DC Department of Buildings — Building Permits·dob.dc.gov·Accessed 2026-04-07·Direct link

FAQ

Are ADUs allowed in Anacostia, Washington DC?
Yes. DC Zoning Regulations permit accessory apartments (ADUs) in residential zones district-wide, including Anacostia. Anacostia is one of DC's oldest neighborhoods east of the Anacostia River.
Are there flood zone concerns for ADUs near the Anacostia River?
Yes. Properties near the Anacostia River may be in FEMA flood zones. Verify flood zone status before planning any below-grade or ground-floor ADU.