Add flexible living space to your Bay Area property — designed, permitted, and built by one licensed design-build team.
New Bay Builders is a licensed design-build remodeling company (CSLB #1057737) serving the Bay Area since 2019. An accessory dwelling unit — whether a detached backyard cottage, an attached addition, a garage conversion, or a junior ADU — adds flexible living space for family, guests, a home office, or rental income.
Because we are design-build, one team guides your project from the first consultation through design, permits, construction, and final walkthrough — with a detailed written scope and a 1-Year Warranty.
Every property is different, but ADU projects with New Bay Builders typically include elements such as:
A free consultation to discuss your goals, your property, and what’s possible.
Design development tailored to your property, needs, and budget.
A detailed written scope so you know exactly what your project includes.
Construction by our licensed in-house design-build team.
A final walkthrough of your completed ADU, backed by our 1-Year Warranty.
Yes. Our design-build team prepares permit-ready plans and coordinates with your city or county planning and building departments.
Detached ADUs, attached ADUs and additions, garage conversions, and junior ADUs (JADUs).
We serve homeowners across Contra Costa, Alameda, and Marin counties — 62 communities in total.
Yes. Call (510) 295-3205 or use the form on our contact page to schedule a free consultation.
Yes. Our projects are backed by a 1-Year Warranty.
Yes — financing options are available for qualified projects.
Schedule your free consultation today and let’s talk about what an ADU could add to your property.
Proudly serving homeowners across Contra Costa, Alameda & Marin counties.
