Attached ADU in California
FabuHome
9451 Telstar Avenue, El Monte, CA 91731
FabuHome offers affordable ADU building services, including detached units, in-law suites & backyard cottages. Full-service design to construction, tailored to your budget, helping homeowners add value & flexible living space.
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UADU
1702 S. Robertson Blvd. #177, Los Angeles, CA 90035
UADU is a California ADU contractor offering garage conversions, detached, attached, and two-story ADUs. They handle design, permits, and construction. Free feasibility checks available. Projects typically take 4–6 months.
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G Squared Construction
67 Martha Road, Orinda, CA 94563
TR Construction
9335 Mira Mesa Boulevard, San Diego, CA 92126
Epic Modulars
157 North 4th Street, San Jose, CA 95112
Epic Modulars delivers fast, flexible, and customizable solutions for homes and ADUs. Their manufactured homes and ADUs are built in controlled factory environments, ensuring superior quality, faster timelines, and predictable costs.
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Resilient Homes Inc.
South Lake Tahoe, CA 96150
Resilient Homes Inc is a licensed ADU contractor offering custom accessory dwelling units, including granny flats, in-law suites, and rental units. They handle permitting, design, and construction with guaranteed workmanship and budget transparency.
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NP Line Design INC
22616 Kittridge Street, West Hills, CA 91307
South Land Remodeling
15021 Ventura Boulevard, Los Angeles, CA 91403
South Land Remodeling is an LA-based ADU contractor with 20+ years of experience. They offer full-service ADU construction, garage conversions, room additions, and permit management across Los Angeles and the San Fernando Valley.
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ADU's by Design
3600 Lime Street, Riverside, CA 92501
ADU's by Design is an Inland Empire ADU contractor serving Riverside & San Bernardino County. They offer full-service accessory dwelling unit design & construction, including detached ADUs, garage conversions, remodeling & architectural design.
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Shermans Builders Inc
4818 Mount Elbrus Drive, San Diego, CA 92117
Shermans Builders Inc. is a licensed San Diego ADU contractor with 150+ projects completed. Services include detached ADUs, garage conversions, and JADUs, covering permits, design, and construction with upfront cost estimates.
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Second Dwellings
100 Higgins Canyon Road, Half Moon Bay, CA 94019
New Avenue, Inc
2120 University Avenue, Berkeley, CA 94704
New Avenue, Inc is a full-service design-build company serving the San Francisco Bay Area and Portland, OR since 2011. They specialize in ADUs, custom homes, renovations, additions, and Enclaves, managing design, permitting, and construction under one roof.
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Tohill Construction
250 East Easy Street, Simi Valley, CA 93065
An ADU (accessory dwelling unit) is a secondary home on a single-family property. Tohill Construction builds granny flats, garage conversions & detached ADUs, offering predesigned plans, custom designs, and financing support.
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KSH Construction
3755 Avocado Boulevard, La Mesa, CA 91941
KSH Construction begins each project with a Discovery Call to discuss pricing, timelines, and fit, followed by an in-home consultation where the team measures the space and identifies structural, plumbing, or electrical constraints.
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Legacy Builders LA
Los Angeles, CA
Legacy Builders LA is a trusted ADU contractor in Los Angeles with 20+ years of experience. They offer ground-up ADUs, JADUs, garage conversions & additions, delivering custom, high-quality accessory dwelling units tailored to each homeowner.
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Other cities in California
What you need to know
Searching for top Attached ADU ADU Contractors in California? Our directory highlights trusted local professionals who specialize in designing and building accessory dwelling units (ADUs).
Working with a qualified Attached ADU ADU Contractor in California 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 Attached ADU professionals can guide you through every step.
California homeowners are increasingly investing in ADUs to create additional living space, generate rental income, or support multigenerational living. The Attached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Attached ADU ADU Contractors in California, and get started today.