Housing Types

Sonoma County recognizes that we need a variety of development types to meet our community’s housing needs. Below are links to permitting resources for different types of housing development:

Accessory Dwelling Units & Junior Accessory Dwelling Units

Information about Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs)--smaller living units allowed on parcels with a single-family home.

Agricultural Housing

Housing types allowed on agricultural land, serving the agricultural uses of the land.

Cottage Housing Developments

Small units similar in scale, bulk, and mass to a single-family home.

Mixed-Use Development

Allows a mix of residential and commercial uses in commercial areas where urban services, such as sewer and water, are readily available.

Mobile Home Parks

Temporary or permanent area for mobile homes.

Multifamily Housing Development

Application procedures, application requirements, and development standards for multifamily development and other housing development that requires design review. .

Single-Room Occupancy Facilities

Facilities that are intended to provide housing opportunities in selected commercial zones for lower-income one- or two-person households that cannot typically afford apartments.

Streamlined Housing Developments (Senate Bill 9)

Senate Bill 9 allows a property owner to split a lot into two and build up to two new residential units through a ministerial permitting process if the property is within a single-family residential zone and a U.S. Census urban area, and meets certain requirements.

Tiny Houses

A summary of local and State regulations on all types of small homes. 

Workforce Housing Combining Zone

A combining zone to allow housing on commercial- and industrial-zoned land.