Terms of use for Berkeley, CA
Last updated October 15, 2026.
The service
Berkeley ADU Guide is a free referral service for accessory dwelling unit (ADU) and guest house construction in Berkeley, CA, and for Oceanside, Encinitas, San Marcos, and Vista as described on those pages. We are not a contractor. We do not build, design, draw plans for, or supervise ADU work, and we make no promises about any contractor's work.
What a call and a form do not do
We do not quote a price, design a unit, take a deposit, or book the job. We pass contact details to one independent licensed ADU contractor after you agree, and we can schedule a time for that contractor to follow up. Any contract, price, design and plans, or permit is between you and the contractor you choose.
Your contract is with the contractor
California home improvement contract rules, apply to the contractor's contract, not to this referral. Verify the contractor's license on the CSLB license check before you hire them. Guides and cost figures on this site are general information from the sources named on each page. They are not legal, engineering, or financial advice, and they are not a quote.
City rules vary by address
Each city sets its own ADU rules, and Berkeley's rules differ inside and outside the Hillside Overlay. The location and guide pages cite the sources. Your city's planning staff, not this site, is the final word on what your lot allows.
Liability
To the extent the law allows, Berkeley ADU Guide is not liable for work performed by any contractor or for decisions you make based on information on this site.