Sonoma County affordable units in new housing (inclusionary)

Each rule below links to the section of the Sonoma County Municipal Code it was read from, with the code text one click away (checked October 2026). General information, not legal advice.

What Sonoma County's code says

Sonoma County code What Sonoma County's code adds
Projects it applies to	The rule applies to projects of 1 or more residential units. § 26-89-040 · code text any person who constructs or develops one (1) or more residential units
Share of affordable units	At least 20 percent of new dwelling units must be affordable; at least half of those go to low-income households. Applies: Applies to ownership housing projects built on site. § 26-89-040 · code text To meet the requirements of this Article through construction of affordable units on-site within an ownership housing project, at least 20 percent of all new dwelling units shall be affordable At least 30 percent of converted units must be offered for sale as affordable to low and very-low income households. Applies: Applies to projects converting existing rental units or airspace parcels to condominium, common interest or timeshare ownership, built on site. § 26-89-040 · code text at least 30 percent of the converted units shall be offered for sale as affordable to low and very-low income households At least 15 percent of new rental units must suit low- and very low-income households; half for very low-income. Applies: Applies to on-site rental projects using the 15 percent option. § 26-89-040 · code text at least 15 percent of all new rental units shall be affordable to low- and very low-income households At least 10 percent of new rental units must suit very low- and extremely low-income households; half for extremely low. Applies: Applies to on-site rental projects using the 10 percent option. § 26-89-040 · code text at least 10 percent of all new rental units shall be affordable to very low- and extremely low-income households

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Frequently asked questions

Does Sonoma County require affordable units in new housing?

Sonoma County's code: The rule applies to projects of 1 or more residential units. (§ 26-89-040); At least 20 percent of new dwelling units must be affordable; at least half of those go to low-income households. (Applies to ownership housing projects built on site.) (§ 26-89-040).

Affordable units in new housing (inclusionary) in Sonoma County

What Sonoma County's code says

Who this affects

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