Type Five

1336 Channing Way, Berkeley, CA 94702 19.6 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

Inspired ADUs

1940 Union Street, Oakland, CA 94607 17 miles

Licensed 20 years in business

Inspired ADUs is an architect-led ADU design firm serving the Bay Area and Southern California. With 20+ years of experience and 250+ ADUs permitted, they offer custom, panelized, and modular ADU solutions, plus interior design and SB9 lot split s... read more

Regency Construnction & Remodeling BA

The Paramount, 95 3rd St, San Francisco, CA 94103 20.7 miles

Prefab Specialist

Regency Construction & Remodeling BA is a San Francisco ADU contractor offering new builds, space conversions, and prefab ADU solutions. They handle design to completion, manage permits, and ensure compliance with local zoning laws.

Bay Area Home Remodelers

225 Schwerin Street, San Francisco, CA 94134 19.1 miles

Luxury Builds

Bay Area Home Remodelers builds ADUs in Daly City, San Francisco & San Jose. Services include garage conversions, granny flats, JADUs & detached units. Full project support from permits to completion.

Nestadu

100 Shoreline Highway, Mill Valley, CA 94941 29.4 miles

Luxury Builds

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

Jaws Construction Services

14000 Kelso Road, Byron, CA 94514 29.5 miles

Jaws Construction Services builds ADUs, garage conversions, and JADUs. They handle permits, HOA coordination, and offer site-built or prefab options. East Bay ADUs rent for $1,500–$3,500+/month, potentially boosting property value.

Other cities in California

What you need to know

Searching for top Prefab / Modular ADU ADU Contractors in Hayward, 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 Hayward 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.

Hayward 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 Hayward, California, and get started today.

Prefab / Modular ADU near Hayward, CA