Backyard project permits in Washington, DC
DC permits almost everything. Only a garden shed of 50 sq ft or less skips the permit, every deck needs one, and in historic districts even those small exemptions disappear.
Rules last checked by a person on October 20, 2026. Guidance only; confirm with Washington before you build.
| Typical project | Permit? |
|---|---|
| Shed10 by 12 ft shed, 10 ft tall, no power | Yes: Building permit |
| Deck160 sq ft freestanding deck, 24 in high | Yes: Building permit |
| Fence6 ft wood fence in the back yard | Yes: Fence permit (DOB) |
| Garage24 by 20 ft detached garage with lights | Yes: Building permit, Zoning review (and BZA special exception if in the required rear yard), Electrical permit |
| ADU650 sq ft detached backyard cottage | Yes: Building permit and certificate of occupancy, Zoning review (special exception if conditions aren't met) |
Check your exact lot
Permit office
2017 DC Construction Codes (12 DCMR, based on the 2015 I-codes) and the Zoning Regulations of 2016 (11 DCMR) as amended through ZC Case 25-12.