Jurisdiction directory
District of Columbia home project permits by county
Many District of Columbia households live outside city limits, where the county building department — not a city — issues the permit. 1 District of Columbia counties, covering the state's largest jurisdictions, are inventoried here.
Verified August 2026
Counties covered
1
largest jurisdictions first
Municipalities tracked
1
in District of Columbia
Population covered
0.7M
residents in listed counties
Code basis
Statewide
DC Construction Codes, based on the IRC with District amendments
Highest-priority markets
Ranked by population, regulatory complexity, home-rule authority and municipal density.
All District of Columbia counties we cover
1 counties, largest first.
Sources
Sources & verification
Last verified August 2026. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing — they are not quotes. Permit rules change; confirm with the building department before starting work.