Learn about building an ADU in Marin County
Strengthen our community and create flexibility for your family
Phases of ADU Development
Free customized ADU Feasibility consults for Marin homeowners in participating locations!
You’ll meet with an ADU expert and receive a customized ADU Feasibility Report.
Get Inspired
Check out floorplans, see photos, and learn more from your neighbors who are building ADUs.
“
Having a wonderful tenant and seeing the life it brings to her and us, made this really worth it.”
Jane and Doug, Mill Valley, 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
Browse Resources
Read our comprehensive workbook, estimate your budget with our calculator, and use our other tools to support your project.
Get 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.
Ready to ADU?
Take the first steps →
Getting Started
