About Walnut Creek ADU Builders

Walnut Creek ADU Builders is an independent local resource for homeowners planning an accessory dwelling unit in Walnut Creek, Lafayette, Danville, Orinda and nearby communities.

What this site does

We publish the planning information that is hard to find in one place: what ADUs cost in Contra Costa, what state law guarantees, which cities offer pre-approved plans, what Central San requires, and which rebates are still funded. Every fact is dated and linked to its source: state code sections, city and County program pages, utility districts, and labeled contractor cost data.

How quotes work

Walnut Creek ADU Builders is an independent website that connects homeowners with local ADU contractors. We are not a contractor and do not design, permit or build ADUs. When you call or send a project request, it goes to an independent ADU builder serving your area, who may contact you about your project. Contractors may pay us for project requests or for use of this website.

What we don't do

• We are not affiliated with any city, the County, Central San or any state agency.
• We don't give legal, tax, lending or investment advice.
• We don't publish reviews, ratings or project portfolios.

Check before you hire

Verify any contractor's license at cslb.ca.gov. Read our guide to choosing an ADU builder.

Questions: call (925) 709-5438 or use the contact form.