Nestadu

100 Shoreline Highway, Mill Valley, CA 94941 25.2 miles

Nestadu is a full-service ADU builder offering custom site-built and prefab accessory dwelling units. Prefab models range from $115K–$317K. Custom builds start at $400/sq ft. Financing options include HELOCs, construction loans, and CA grants.read more

Joy Line Homes

3110 Mission Drive, Capitola, CA 95065 37.2 miles

Prefab Specialist Luxury Builds

Joy Line Homes offers the ADURA ADU Series — factory-built backyard cottages and granny flats featuring modern design, high-end finishes, and durable materials. An affordable, plan-based ADU solution for homeowners seeking quality detached acces... read more

Perpetual Homes ADU

4115 Blackhawk Plaza Circle, Danville, CA 94506 27.4 miles

40 years in business Prefab Specialist Eco-Friendly

Perpetual Homes is a Northern California ADU builder with 40+ years of experience. They offer customizable prefab ADUs, a 10-step process, no site work markup, Energy Star insulation, a 7-year warranty, and an A+ BBB rating. read more

ExpandADU | Prefab ADUs

41111 Mission Boulevard, Fremont, CA 94539 20.7 miles

Prefab Specialist

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

Type Five

1336 Channing Way, Berkeley, CA 94702 21.6 miles

Licensed Prefab Specialist Luxury Builds

Type Five is a Berkeley, CA-based ADU builder offering custom backyard cottages, granny flats & in-law suites. They combine modular design, transparent pricing & streamlined construction for stress-free, high-quality detached ADUs built to... read more

Wellmade

2371 Verna Court, San Leandro, CA 94577 13.1 miles

Licensed 5 years in business Prefab Specialist

Wellmade is a California prefab ADU builder specializing in panelized accessory dwelling units. Founded in 2020, they've completed 200+ projects, reducing construction waste by 85%. Serving CA, OR, and WA with all-inclusive pricing.

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What you need to know

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

Working with a qualified Prefab / Modular ADU ADU Contractor in San Mateo 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 Prefab / Modular ADU professionals can guide you through every step.

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

Browse our listings to find the best Prefab / Modular ADU ADU Contractors in San Mateo, California, and get started today.

Prefab / Modular ADU near San Mateo, CA