ADU permit rules in Virginia
Virginia sets building-permit exemptions statewide, so they are the same in every city and county; zoning limits are local. An ADU is a dwelling and always needs a building permit.
City rules below were each checked against the city’s own pages.
Cities we cover in Virginia
- ADU permits in Alexandria verified
- ADU permits in Arlington County verified
- ADU permits in Fairfax County verified
Not on the list?
Enter your address. If we haven’t verified your city yet, you’ll get the statewide Virginia building code answer marked low confidence, plus your zoning and flood data where public maps have it.