ExpandADU | Prefab ADUs

41111 Mission Boulevard, Fremont, CA 94539 14.7 miles

ExpandADU is a California-based prefab ADU builder offering full-service accessory dwelling unit construction, including consultation, design, planning, and build. Serving the Bay Area and beyond, they specialize in detached ADUs, granny flats, an... read more

ADU Builders Group

15166 Los Gatos Boulevard, Los Gatos, CA 95032 7 miles

21 years in business Eco-Friendly

ADU Builders Group is a Bay Area family-owned ADU contractor with 21+ years of experience. They build attached, detached, converted, and junior ADUs, offering full design-build services, permitting support, a 3-year warranty, and a 10-year structu... read more

California Bay Builders & Remodeling

2150 N 1st Street Suite 400, San Jose, CA 95131 6.6 miles

Licensed Eco-Friendly

Bay Area design-build ADU specialists. One project, one point of contact — design, engineering, permitting, and construction from start to finish. CSLB #1130783.

Elite ADU Santa Cruz

347 Soquel Avenue, Santa Cruz, CA 95062 23.8 miles

Elite Construction builds ADUs in Santa Cruz County, offering detached units, garage conversions & addition ADUs. Projects range 250–1,200 sq ft, cost $115K–$450K, and take 6–9 months. Free estimates available.

Intelligent Choice Builders

1437 Park Avenue, San Jose, CA 95126 4.4 miles

Licensed Eco-Friendly

Intelligent Choice Builders is a licensed Bay Area ADU contractor serving Palo Alto, Cupertino, San Jose & Sunnyvale. They build detached ADUs, garage conversions, granny flats & more, managing permits, design & construction end-to-end... read more

ADU Builders Bay Area

111 N Market St Suite 1150, San Jose, CA 95113 5 miles

ADU Builders Bay Area specializes in detached ADUs, garage conversions, in-law suites & more. Expert ADU contractors offering transparent pricing, full permitting & quality construction throughout the Bay Area.

Full Steam Ahead Construction

3527 Mount Diablo Boulevard, Lafayette, CA 94549 43.4 miles

Licensed

Licensed ADU contractor Full Steam Ahead Construction serves East Bay homeowners with custom accessory dwelling units, including garage conversions, backyard cottages & in-law suites. Serving Concord, Oakland, Berkeley & more.

Urbatect Development, LLC

444 Airport Boulevard, Watsonville, CA 95076 25.7 miles

Licensed 15 years in business

Urbatect Development LLC is a California & Washington ADU contractor offering custom homes, garage conversions, JADUs & detached ADUs. 15+ years experience, 3,500+ projects, fixed pricing, fast permitting & 3D design.

9 Builders

San Jose, CA 95122 2 miles

Licensed Eco-Friendly Luxury Builds

9 Builders is a Bay Area ADU contractor offering full-service design, permits & construction. Specializing in detached ADUs, garage conversions & additions, costs range $150K–$350K, taking 8–14 months to complete.

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What you need to know

Searching for top Basement Conversion ADU Contractors in San Jose, California? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).

Working with a qualified Basement Conversion ADU Contractor in San Jose ensures your ADU project meets local building codes, zoning laws, and permit requirements. Whether you're planning a detached ADU, garage conversion, or backyard cottage, experienced Basement Conversion professionals can guide you through every step.

San Jose homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Basement Conversion experts featured here bring local expertise and proven experience to help make your project a success.

Browse our listings to find the best Basement Conversion ADU Contractors in San Jose, California, and get started today.

Basement Conversion near San Jose, CA