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Learn about building an ADU in Napa or Sonoma County
Secure your future, support the community
Get Started
Learn Rules
Budget
Design
Permit
Build
Rent
Whether you’re new to learning about ADUs or ready to begin the process, we have the information you need.
The best first step for your ADU
Customized feasibility consults for your property
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Explore our ADU Standard Plans
Save time and money with a standard ADU plan! Connect today with the designer, architect, or prefab company.
Visit the plans gallery
Get inspired
Check out floorplans, see photos, and learn more from your neighbors who are building ADUs.
ADU Stories
ADU Floorplans
Did you miss one of our webinars?
Our webinars provide residents with clear information about the benefits of ADUs and the design, building, and planning phases.
See the webinar library
Looking for the most up-to-date information?
Check out our blog, with tools, tips, news, and all the latest updates.
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Resources for every step of the way
Everything you need to know if you’re considering building an ADU or Junior ADU.
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