ADU Company San Diego County specializes in off-site ADU construction, offering efficient, affordable accessory dwelling units. From granny flats to detached ADUs, their expert team guides clients from concept to Certificate of Occupancy.
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Home by Tom is a Bay Area ADU contractor with 21+ years of experience serving Walnut Creek. They build detached ADUs, attached ADUs, and garage conversions, managing design, permits, and construction for rental income or multi-generational living.
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Our turn-key design and construction process connects your directly with our talented team of designers and engineers and puts the control of customizing your project directly at your fingertips. We’ll develop awesome designs and work with you every step of the way until your custom project comes to completion.
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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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Tate & Son, Inc. is a licensed ADU contractor in San Diego & Southern California. They offer garage conversions, in-law suites & detached ADUs. Pricing starts ~$70K. 5-year warranty. Free estimates available.
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A1 ADU Contractor is Sherman Oaks' trusted ADU builder serving LA County. Specializing in garage conversions, detached ADUs & in-law suites, they handle permits, design & construction. Projects cost $50K–$100K, taking 3–6 months.
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Price Builders is an Imperial Beach design-build contractor specializing in home additions, ADUs, and remodeling. Services include second-story additions, in-law suites, kitchen and bathroom remodels, and aging-in-place renovations.
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Kyra Construction is an experienced ADU contractor offering detached ADUs, garage conversions, in-law suites, JADUs, granny flats, and backyard cottages. They handle permits, zoning, and full construction, delivering quality accessory dwelling units tailored to each homeowner.
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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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KGA Construction Inc offers turnkey ADU construction in Sacramento, including garage conversions, detached ADUs, and backyard cottages. Services cover design, permits, and build management for accessory dwelling units that add lasting property value.
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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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Full Circle Builders offers custom ADU construction in Riverside County & the Inland Empire. Detached ADUs start at $185,000 (590 sq ft, 1BD/1BA). Container homes also available. Turn-key builds, permitting assistance included.
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IEE Designs is a San Diego County design & build firm founded in 1998, specializing in ADU construction and landscape design. Services include detached ADUs, granny flats, casitas, and custom exterior landscaping for residential clients.
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Deharo Construction is a trusted ADU builder serving Livermore, Pleasanton, and Dublin. Specializing in accessory dwelling units, new construction, and home additions, they deliver custom granny flats, detached ADUs, and in-law suites across the Tri-Valley area.
read moreCalifornia is at the forefront of the Accessory Dwelling Unit (ADU) movement in the United States. With one of the most severe housing shortages in the nation, the state has enacted sweeping legislation to make ADU construction more accessible. Since 2020, California laws such as AB 68, AB 881, and SB 13 have significantly reduced barriers, eliminating minimum lot size requirements, reducing setback rules, and streamlining the permitting process. For homeowners looking to add value to their property or create additional rental income, working with experienced ADU contractors in California has never been more important.
Professional ADU contractors operating in California must stay current with a constantly evolving regulatory environment. Under California law, local agencies are required to approve or deny ADU permit applications within 60 days. Additionally, ADUs under 800 square feet cannot be denied solely based on floor area ratio limits. Contractors must also be familiar with owner-occupancy rules, utility connection requirements, and fire safety standards that vary by county and municipality. Cities like Los Angeles, San Diego, and San Jose each have their own local ordinances layered on top of state law, making local expertise a critical asset.
Experienced California ADU contractors are skilled in building a wide variety of ADU types to suit different property configurations and homeowner needs. The most common types include:
Selecting the right contractor is one of the most critical decisions in any ADU project. Homeowners should look for contractors who hold a valid California Contractors State License Board (CSLB) license, ideally a Class B General Building Contractor license. It is also important to verify that the contractor carries proper liability insurance and workers' compensation coverage. Look for professionals with a proven track record of successfully permitted ADU projects in your specific city or county.
Building an ADU in California offers significant financial and lifestyle benefits. Homeowners can generate rental income to offset mortgage costs, house family members, or increase overall property value. In high-cost markets like the San Francisco Bay Area or Los Angeles, a well-built ADU can add hundreds of thousands of dollars in property value. With the right California ADU contractor by your side, the process can be smooth, compliant, and highly rewarding.