Napa Sonoma ADU Resource Center

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
  • Webinar
  • Example floor plans
  • Design, permitting and construction workbook
  • Policies and zoning requirements across all Napa and Sonoma county jurisdictions

Visit the Napa Sonoma ADU Resource Center.

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.