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ADUs & JADUs
Accessory Dwelling Unit Regulations
Accessory Dwelling Unit Calculator
The ADU Calculator is a resource to help estimate the costs, returns, and benefits associated with building an ADU
Napa Sonoma ADU Center
The Napa Sonoma ADU Center is a fiscally-sponsored project of Napa Valley Community Foundation with support from Community Foundation Sonoma County and others. They provide resources for homeowners in Napa and Sonoma counties who want to build an ADU.
Sonoma County Housing Authority
State ADU Law
California Department of Housing and Community Development's web site describing state laws and regulations about Accessory Dwelling Units.
View State Web Site