Zoning Overlays & Bonuses in Fairfax County, VA (2026)

1 rule for unincorporated Fairfax County, Virginia.

Verified from official government sources

Note: These county rules apply to unincorporated areas of Fairfax County. If you live within an incorporated city, that city's own rules apply: see the city list below.

Density Bonus Law

Fairfax County grants a 20 percent density bonus for single-family rezoning and special exception applications, and a 10 to 20 percent bonus for multifamily projects, in exchange for providing affordable dwelling units under the ADU Program.

Fairfax County ADU Density Bonus

Some Restrictions

Fairfax County, VA, Zoning Ordinance subsec. 5101.4.A(1)

If the application requests approval of single-family detached dwelling units, single-family attached, or stacked townhouse dwelling units, the lower and upper end of the density range set forth in the Comprehensive Plan applicable to the application property is increased by 20 percent for purposes of calculating the p...

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