Attached ADU in California
Custom ADU Builder
Los Angeles, CA 90012
Custom ADU Builder specializes in detached ADUs, attached ADUs, garage conversions & JADUs. Projects complete in ~3 months. Pricing starts at $235/sqft. Turn-key builds include quartz countertops, tile showers & luxury vinyl flooring.
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Otto ADU
2926 Denby Avenue, Los Angeles, CA 90039
Otto ADU is a licensed Los Angeles ADU builder specializing in garage conversions, detached ADUs, JADUs & granny flats. Serving LA County with 100+ completed units, adding avg. $185K in home value.
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AMG Construction
4237 West 142nd Street, Long Beach, CA 90250
AMG Construction INC offers residential & commercial remodeling, new builds, ADU construction, room additions, and roofing services. Licensed and insured, they handle full projects from design to completion.
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Fortune ADU
9810 Scripps Lake Drive, San Diego, CA 92131
Fortune ADU is a Southern California ADU contractor offering full-service design, permitting, and construction. Services start at $3,999.99, covering detached ADUs, JADUs, garage conversions, and more, with most projects completed in 6–12 months.
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ADU by Kn Remodeling
19709 Ventura Boulevard, Woodland Hills, CA 91364
KN Remodeling is a certified ADU contractor serving Los Angeles, Woodland Hills, Simi Valley & Thousand Oaks. Specializing in detached ADUs, attached ADUs & garage conversions, they handle design, permits & construction with 100+ ADU plans completed.
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Harmony Design & Development
5880 3rd Street, San Francisco, CA 94124
Harmony Design & Development builds custom ADUs across the San Francisco Bay Area, including detached units, garage conversions, and in-law suites. They manage permits, design, and construction from start to finish.
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ADUPALS
1420 Kettner Boulevard, San Diego, CA 92101
ADU PALS is a San Diego ADU builder offering full-service accessory dwelling unit construction. From site evaluation to completion, they handle design, permits & builds. Costs range $150K–$300K; timelines 8–12 months.
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Laguna Construction Inc.
325 South P Street, Imperial, CA 92251
Don’t settle for a one-size-fits-all design. Whether you want something simple and efficient or stylish and custom, Laguna Construction Inc. works with your vision and your budget to create the perfect ADU for your property.
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RnD Builders Inc
21250 Califa Street, Woodland Hills, CA 91367
RnD Builders is a top-rated ADU builder and design-build firm serving Ventura County and Los Angeles County, specializing in ADU construction, home additions, remodels, and outdoor projects with a client-focused approach.
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Bonny Builders Group
P.O. Box 2723 Oxnard, CA, Oxnard, CA 93034
Bonny Builders Group specializes in Accessory Dwelling Units (ADUs), including garage conversions, granny flats & detached units. With 39 years of experience, they handle permits, design, and construction to code.
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BuildZig ADU Services
3007 Telegraph Avenue, Oakland, CA 94609
BuildZig ADU Services is a Bay Area ADU contractor specializing in design, permitting, and construction. They handle garage conversions, detached ADUs, basement/attic conversions, and more, offering transparent pricing throughout.
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Gary Faith Construction
7313 Carroll Canyon Road, San Diego, CA 92121
Gary Faith Construction is a licensed ADU contractor in San Diego specializing in detached ADUs, garage conversions, and above-garage units. Serving San Diego County, they manage projects from consultation to completion, ensuring full compliance with local zoning laws.
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ADU Certified
4401 Atlantic Avenue, Long Beach, CA 90807
ADU Certified is a Long Beach, CA contractor specializing in ADU planning, permitting & construction since 2000. Services include garage conversions, detached ADUs, kitchen & bathroom remodeling throughout Southern California.
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Realty Builders Inc.
50 California Street, San Francisco, CA 94111
Realty Builders Inc. is a licensed ADU contractor specializing in custom accessory dwelling units, including in-law suites, granny flats, garage conversions & rental units, offering streamlined permitting & guaranteed workmanship.
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ADU Ventura County
2734 Johnson Drive, Ventura, CA 93003
ADU Ventura County builds accessory dwelling units including detached ADUs, garage conversions, granny flats, and Casitas. With 10+ years of experience, they offer free consultations, budget estimates, and full construction management for Ventura County homeowners.
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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.