Learn about building an ADU in Napa or Sonoma County
Secure your future, support the community
Whether you’re new to learning about ADUs or ready to begin the process, we have the information you need.
Hi! We're the Napa Sonoma ADU Center
We're here to help you build an ADU.
- Customized feasibility consultations for your property member communities (see the Contact page for details)
- Step-by-step guidance on every phase of the ADU process
- Detailed ADU Workbook with fillable exercises
- Inspiring stories of ADUs built in your area
- A summary of your community's rules for ADU development
- ADU Calculator to estimate budget and return on investment
… and much more!
The best first step for your ADU project
Customized feasibility consults for your property
Note: Consults are available in member communities – see our Contact page for details.
Get Inspired
Check out floorplans, see photos, and learn more from your neighbors who are building ADUs.
“
It provides peace of mind, knowing that our tenants are nearby to keep an eye on things when we’re away. We have no problem renting out the second unit, since it’s located near major employers.”
Surinder, ADU owner
ADU Stories
Read about people in your community who have built ADUs
Floorplans Inspiration
See layouts for dozens of real ADUs from across California
Expert Advice
We keep up with the latest news, incentives, resources, and research about ADU development.
ADU Webinars Library
Our webinars provide residents with clear information about the benefits of ADUs and the design, building, and planning phases.
ADU Blog
Check out our blog, with tools, tips, news, and all the latest updates.
