Zoning Overlays & Bonuses in Sonoma County, CA (2026)
1 county-level rule, plus city-specific rules for 2 cities in Sonoma County, California.
Verified from official government sources
Note: These county rules apply to unincorporated areas of Sonoma County. If you live within an incorporated city, that city's own rules apply: see the city list below.
Density Bonus Law
Sonoma County's supplemental density bonus program lets residential projects of five or more units build up to 50 percent above the General Plan and zoning density limit when a set share of units go to extremely low-, very low-, low-income senior, or moderate-income households.
Sonoma County Density Bonus Program Rules
Some RestrictionsSonoma County Code § 26-89-050(D)
a residential project of five or more base units shall be eligible for a density bonus of up to 50 percent above the maximum density allowed by the General Plan and zone district, if the project provides a total of: 10 percent or more of the base units for extremely low-income households; 20 percent or more of the base units for very low-income households; ... or 40 percent or more of the base ...
Zoning Overlays & Bonuses by City in Sonoma County
2 cities in Sonoma County have their own zoning overlays & bonuses rules. Each link goes to that city's dedicated page with code citations.
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