R-3 Residential, 3 dwellings per acre in Fairfax County
Applies to district codes matching R-?3.
Rules last checked by a person on October 20, 2026. Guidance only; confirm with Fairfax County before you build.
Garage
| House setbacks | 30 ft front, 12 ft side, 25 ft rear, 35 ft height (cluster lots: 20 ft front, 8 ft side, 20 ft total) |
|---|
ADU
| House setbacks | 30 ft front, 12 ft side, 25 ft rear, 35 ft height (cluster lots: 20 ft front, 8 ft side, 20 ft total) |
|---|