Napa Sonoma ADU, a project of the Napa Valley Community Foundation and Community Foundation Sonoma County, collects resources that aid in the creation of accessory dwelling units (also known as second units or ADUs). Resources include:
- ADU calculator
- Address lookup tool
- ADU home match
- Example floor plans
- Design, permitting and construction workbook
- Policies and zoning requirements across all Napa and Sonoma county jurisdictions
While this web page is oriented toward Napa and Sonoma county homeowners, many of the materials will be broadly useful to other parties and in other locations. It may also serve as a model for other cities and counties.
This workbook helps inspire and guide you to build an ADU in Napa and Sonoma counties. Written for homeowners, it can be used by local jurisdictions to help provide guidance on second unit types with case studies and design ideas.
Estimate the cost of converting part of your home into an accessory dwelling unit (ADU) or constructing a rental unit.