Detached ADU in California
Zieba Builders
1390 East Burnett Street, Signal Hill, CA 90755
Zieba Builders, a Southern California design-build firm, was named one of the top 7 ADU contractors in Long Beach by Home Builder Digest. They specialize in custom homes, garage conversions, granny flats & detached ADUs.
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Cahla Construction Group
12207 Hawthorne Boulevard, Hawthorne, CA 90250
Cahla Construction Group is a licensed ADU contractor in Los Angeles offering ADU construction, garage conversions, kitchen & bathroom remodeling, home additions, and general contracting for residential and commercial clients.
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California ADU Center INC
7542 Laurel Canyon Boulevard, Los Angeles, CA 91605
California ADU Center INC specializes in ADU planning, design, and construction across California. Services include detached ADUs, garage conversions, JADUs, granny flats, and in-law suites. They manage permitting and navigate California's ADU regulations for homeowners.
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Green Tech
5605 Woodman Avenue, Van Nuys, CA 91401
Green Tech Remodeling offers full-service construction, renovation, and ADU projects including garage conversions, kitchen and bathroom remodels, home additions, flooring, roofing, electrical, plumbing, and more, with 3D design previews included.
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CRS Builders Inc.
4891 Ronson Court, San Diego, CA 92111
Expert ADU builder serving San Diego, including La Jolla, Chula Vista & Encinitas. Full-service accessory dwelling unit construction: planning, design & permitting. In-house team ensures quality granny flats & backyard cottages built to code.
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Hamilton Exteriors
21634 Redwood Road, Castro Valley, CA 94546
Hamilton Exteriors builds detached ADUs, garage conversions, and JADUs across 6 Bay Area counties. Licensed (CSLB #1078806), insured, and bonded. Projects run 5–9 months with fixed-price contracts. CalHFA grants and $0-down financing available.
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Bela Development
1023 Abbot Kinney Boulevard, Venice, CA 90291
Bela Development is an LA-based design-build firm with 15+ years specializing in ADU construction, garage conversions, detached ADUs, and JADUs. They manage design, permitting, and build under one roof, delivering legal living spaces that boost property value by 20–30%.
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Carlsbad Custom ADU Builders
2382 Faraday Avenue, Carlsbad, CA 92008
Carlsbad Custom ADU Builders specializes in custom ADU construction, detached units, granny flats, in-law suites & backyard offices. Offering transparent pricing, flexible financing & full-service solutions to maximize property value in Carlsbad.
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B&A Construction Inc.
501 N Juanita Dr, Palm Springs, CA 92262
B&A Construction Inc. is a licensed general contractor in Manteca, CA, with 35 years of experience. Services include ADU construction, garage conversions, kitchen & bathroom remodeling, and room additions across San Joaquin and Central Valley counties.
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Mountain Top Construction
30 North San Pedro Road, San Rafael, CA 94903
Mountain Top Construction is a Bay Area ADU builder serving San Rafael, San Francisco, and Las Vegas. They specialize in detached ADUs, backyard cottages, granny flats, and in-law suites, managing design, permitting, and construction.
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Gustin & Sumida Construction
PO Box 989, Grass Valley, CA 95945
Gustin & Sumida Construction is a licensed ADU contractor in the Sierra Nevada Foothills, offering full-service accessory dwelling unit construction in Grass Valley, Auburn, Nevada City & beyond, covering design, permitting, and build.
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DB Construction
4555 Valley Boulevard, Los Angeles, CA 90032
DB Construction is a full-service ADU contractor in Greater Los Angeles, building detached ADUs, garage conversions, JADUs, in-law suites, and room additions. They manage permits in-house, offering transparent costs and turn-key project completion.
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Lunasol construction
5857 Owens Avenue, Carlsbad, CA 92008
Lunasol Construction is a San Diego ADU contractor specializing in detached ADUs, garage conversions, and JADUs. They offer custom designs for in-law suites, rental units, and granny flats, helping homeowners add value and living space.
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Done Right Builders and Remodeling
1825 De La Cruz Boulevard, Santa Clara, CA 95050
Done Right Builders & Remodeling is a licensed Bay Area ADU contractor (Lic#1002689) with 20+ years experience. Services include detached/attached ADUs, JADUs & garage conversions in Union City, Hayward, San Jose & Santa Clara.
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L Square Construction
Irvine, CA 92705
L Square Construction is an ADU contractor serving Los Angeles & Orange County, CA. They offer full-service design-build ADU solutions including detached units, in-law suites, garage conversions, and energy-efficient builds with solar integration.
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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.