Detached ADU in California
SouthStar USA
1611 Pomona Road, Corona, CA 92878
SouthStar USA offers ADU construction in Riverside & Orange County, CA. Services include detached ADUs, attached ADUs, garage conversions & JADUs. Quality builds, permit-compliant, with transparent pricing for every project stage.
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ADUscale
528 West Hampshire Avenue, Anaheim, CA 92805
ADUscale is an independent ADU advisory service offering feasibility assessments, contractor verification, escrow-based payment protection, and construction oversight. Fixed-fee, conflict-free guidance for homeowners planning detached ADUs, garage conversions, or backyard cottages.
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ADU Builders California
1610 R St Suite 300, Sacramento, CA CA 95811
ADU Builders California is a tech-driven ADU contractor offering detached ADUs, granny flats & garage conversions statewide. Costs range $30K–$300K+, with builds taking 4–6 months. Free consultations available.
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Step Up Builders Inc
16250 Ventura Boulevard, Encino, CA 91436
Step Up Builders Inc is a Class A licensed ADU contractor in Encino, CA, serving Los Angeles, San Fernando Valley & Inland Empire. 30+ years experience in detached ADUs, garage conversions, JADUs & remodels. Free estimates available.
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Granny Homes
16 Richards Drive, Roseville, CA 95678
Granny Homes, founded by Jason Lewis, is a Sacramento-based ADU contractor specializing in attached ADUs, detached backyard cottages, and garage conversions. They offer full-service design, permitting, and construction for functional, affordable accessory dwelling units.
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ADU Garage Experts
2999 Overland Ave. Suite 103, Los Angeles, CA 90064
ADU Garage Experts, a Southern California structural engineering firm, specializes in ADU planning and drafting. They offer garage conversions from ~$70/sqft, attached and detached ADUs, helping homeowners add rental income or living space.
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Doobek Builders
5308 Derry Avenue, Los Angeles, CA 91301
Doobek Builders offers home remodeling, large additions, and ADU construction. Services include garage conversions, interior conversions, additions, and ground-up ADU builds—ideal for granny flats, in-law suites, or backyard cottages.
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Icon Construction & Design
619 5th Street, Clovis, CA 93612
Icon Construction & Design is a Fresno & Clovis, CA ADU builder with 20+ years of experience. They specialize in detached ADUs, garage conversions, and attached ADUs, offering modern design, code compliance, and full project management.
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Sustainable Building and Design
Glatt Street, Eureka, CA 95503
Sustainable Building & Design (SB&D) is a licensed general contractor in Humboldt County, CA, specializing in ADU construction, remodeling, and new builds using sustainable materials at affordable prices.
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California Backyard Homes Inc
6230 Wilshire Boulevard, Los Angeles, CA 90048
California Backyard Homes Inc specializes in prefab ADUs, tiny houses, and modular homes across California. Starting from $44,500, they offer turnkey installation including permits and utility connections, with financing available up to 23 years.
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Morrison Construction
601 Carmen Dr, #215D, Camarillo, CA 93010
Morrison Construction offers expert ADU building services in West Hills, handling everything from planning to completion. Services include custom design, construction, plumbing, electrical, and interior finishes for granny flats, rental units, and in-law suites.
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Valley Boutique Builders
153 2nd Street, Los Altos, CA 94022
Valley Boutique Builders is a licensed Bay Area ADU contractor offering full-service accessory dwelling unit construction, custom home additions, kitchen and bathroom remodeling, and new construction with free initial consultations.
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Result Construction
3412 Birchdale Way, Sacramento, CA 95843
Result Construction is a Sacramento general contractor offering ADU building, garage conversions, kitchen & bathroom remodels, home additions, and custom homes. They manage permits, design, and construction for residential and commercial clients with a focus on quality and sustainability.
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Avica Construction & Development Inc
357 West Route 66, Glendora, CA 91740
Avica Construction & Development Inc is a licensed LA-based ADU contractor building detached ADUs, garage conversions, attached ADUs & JADUs across Los Angeles, Orange County & San Bernardino County, managing design, permits & construction.
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KGM Construction
1508 Mill Street, San Luis Obispo, CA 93401
Founded in 1986 by Mike Morain, KGM Construction is an A+ BBB-rated contractor offering residential remodeling, new home construction, ADUs, granny flats, garage conversions, commercial builds, and storm damage restoration with 35+ years of experience.
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Other cities in California
What you need to know
Searching for top Detached 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 Detached 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 Detached 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 Detached ADU experts featured here bring local expertise and proven experience to help make your project a success.
Browse our listings to find the best Detached ADU ADU Contractors in California, and get started today.