Napa Valley ADU Resources

A transparent, no-gatekeeping guide built to make Napa Valley ADUs easier, clearer, and more achievable—no matter where the best information comes from.

ADU rules vary widely by city and county. This guide breaks down key local requirements so homeowners can quickly understand what applies to their property.

When it comes to local expertise, the Napa Sonoma ADU Center is a standout nonprofit resource for homeowners in our counties. They offer a wealth of free tools, webinars, and personalized feasibility consultations.

Choosing the right lender can make or break your ADU project. This guide highlights trusted ADU financing experts and institutions—from nationally recognized specialists to local Napa Valley lenders—each offering proven solutions for a wide range of ADU scenarios.

A clear overview of California’s new 2026 ADU laws and how recent legislation impacts ADU approvals, fees, and development in Napa Valley.

The How-To-ADU YouTube channel is full of practical ADU insights, because my aim is to provide you with all the best information out there.