Crest Backyard Homes is San Diego's trusted ADU builder, specializing in prefab, detached ADUs, granny flats & garage conversions. Their all-inclusive team guides homeowners from design to completion, ensuring code-compliant, high-quality accessory dwelling units.
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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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Adorn Construction Group in Arcata, CA specializes in custom ADU construction, including detached ADUs and backyard cottages. They offer full-service builds compliant with local codes, helping homeowners add living space or rental income.
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CCS Inc (CSLB #B1047699) is a licensed LA general contractor since 1984 specializing in ADU construction, garage conversions, and room additions. They manage design, permitting, and build, with ADUs generating up to $3,500/month rental income.
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Aurea Construction, based in Thousand Oaks, CA, specializes in ADUs, garage conversions, room additions, sunrooms & second story additions. They manage full projects from design to permits, serving local homeowners seeking quality home expansion solutions.
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Ofir Construction Inc. is a Los Angeles ADU contractor with nearly 20 years of experience. They specialize in ADU builds, garage conversions, and in-law suites, managing permits, planning, and construction while following California building codes.
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GR Innovative Builders Inc. is a Bay Area ADU contractor specializing in accessory dwelling units, granny flats, and in-law suites. Completed projects in Richmond, Oakland, Lafayette & Pinole. Featured in Sunset Magazine.
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Mastery offers full-service ADU construction in San Diego, covering design, permitting, and building. Specializing in detached ADUs, garage conversions, and granny flats, they also provide kitchen remodeling, room additions, roofing, and more.
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Pomona General Contractors offers ADU construction in Pomona, including detached ADUs, attached ADUs, and garage conversions. Services cover permitting, 3D design, energy-efficient builds, and full construction management for granny flats, in-law suites, and backyard cottages.
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Progressive Builders LA offers full-service ADU construction in Los Angeles, handling detached ADUs, garage conversions, granny flats & in-law suites. Custom design, quality materials, on-time delivery & accessible pricing for all project sizes.
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Pro Services General Contractors of San Diego is a family-run remodeling company with 20+ years of experience. Services include kitchen & bathroom remodeling, ADUs, flooring, tile, painting & new construction. Competitive pricing, 3D design & guaranteed completion dates.
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Accessory Dwelling Units (ADUs) offer California property owners passive income, elderly care solutions, and property value growth. Since 2020 legislation, ADU permits are easier to obtain. Construction costs range $350–$450/sq ft, with rental income potential up to $4,000/month.
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CDU Inc. offers expert ADU construction & remodeling in the Greater Bay Area. Services include new builds, garage conversions, electrical, plumbing & custom design to boost property value & functionality.
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Velmor Construction offers full-scope ADU construction in Reseda, covering custom design, permitting, and build. Services include detached ADUs, garage conversions, and in-law suites using quality materials and local code compliance.
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.