R-4 Residential, 4 dwellings per acre in Fairfax County
Applies to district codes matching R-?4.
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, 10 ft side, 25 ft rear, 35 ft height (cluster lots: 20 ft front, 8 ft side) |
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ADU
| House setbacks | 30 ft front, 10 ft side, 25 ft rear, 35 ft height (cluster lots: 20 ft front, 8 ft side) |
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