Attached ADU in California
New Age Design and Build
4501 Mission Bay Drive, San Diego, CA 92109
New Age Design and Build is a San Diego ADU contractor specializing in detached ADUs, garage conversions, backyard cottages, and casitas. They offer full design-to-build services, helping homeowners add rental income, in-law suites, or extra living space.
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Revival Homes
1150 South Olive Street, Los Angeles, CA 90015
Revival Homes is a California ADU project manager handling planning, financing, design, permitting, and construction. They build detached ADUs, garage conversions, JADUs, and more, with costs ranging from $100K to $300K.
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Lumina Builders Inc.
4901 Morena Boulevard, San Diego, CA 92117
Lumina Builders Inc. follows a 5-step remodeling process: consultation, permits, design, construction, and quality check. Serving San Diego, they handle ADUs, garage conversions, and full home remodels with dedicated project management.
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Marini Construction
11155 Foothill Avenue, Gilroy, CA 95020
At Michael Marini Construction, we know that the journey starts with understanding both the potential and the requirements involved. With years of experience guiding clients through everything from design ideas to local building rules, we’re here to help make your ADU dreams become a reality while enhancing your property value.
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Custom Home Builders Malibu
42400 Winchester Road, Temecula, CA 92590
Custom Home Builders Malibu specializes in ADU construction, backyard Casitas & granny flats. They offer turnkey design-build services, handling permits & compliance with California ADU laws for legal, independent living spaces.
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Vision ADU
1440 South State College Boulevard, Anaheim, CA 92806
Vision ADU is a California ADU contractor specializing in detached ADUs, garage conversions, attached ADUs, and JADUs. They offer full-service design, permitting, and construction to help homeowners add value or rental income.
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United Builders Development, Inc
25350 Magic Mountain Parkway, Santa Clarita, CA 91355
Building an ADU boosts property value, generates rental income, and offers flexible living space. United Builders, a licensed ADU contractor, delivers expert design-build solutions, garage conversions, and custom ADUs on time and within budget.
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MTZ Contractors
3515 Atlantic Avenue, Long Beach, CA 90807
Looking for the best ADU construction? Choose Mtz Contractors Inc to completely transform your property, known for constructing excellent ADUs in Long Beach CA. We create and build Accessory Dwelling Units that meet your precise requirements for quality.
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ORR Construction
1977 Obispo Avenue, Signal Hill, CA 90755
ADUs are secondary units built on existing lots. ORR Construction builds detached ADUs, garage conversions, JADUs & in-law suites in California. Costs range $50–$300/sq ft. California laws like SB 897 simplify the permitting process.
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Cavalier Builders Inc
20121 Ventura Boulevard, Woodland Hills, CA 91364
Cavalier Builders offers professional and affordable services for homeowners looking to build an ADU. ADUs can add significant value to your property, provide additional living space, or generate income as a rental. Our expertise in design, construction, and regulations ensure you receive a high-quality addition to your home and property, giving you the peace of mind that your investment is secure.
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Homestead ADU
3705 Meadow View Drive, Redding, CA 96002
Homestead ADU offers turnkey accessory dwelling units for California homeowners. Models range from 451 to 1,200 sq ft. Offsite modular construction cuts costs by 30% and delivers units in 6–7 months. Serving Shasta & San Luis Obispo County.
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Sightline Construction
1045 17th Avenue, Santa Cruz, CA 95062
Sightline Construction is a Santa Cruz general contractor specializing in ADUs, new home builds, renovations, remodels, and custom additions. They manage projects from planning to completion, ensuring code compliance and quality craftsmanship.
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US Modular Inc.
579 West County Line Road, Calimesa, CA 92320
US Modular Inc. is a trusted ADU builder in Riverside County, CA, with 35+ years of experience. They offer prefab ADUs, garage conversions & casitas starting at $150,000, completed in 6–9 months.
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Integrity Home Improvements
7343 Ronson Road, San Diego, CA 92111
Integrity Home Improvements is a San Diego remodeling company founded in 2003 by Ryan Parkinson. Specializing in kitchen & bathroom remodels, home additions, and outdoor living, they serve communities across the greater San Diego area.
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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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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.