ADU Geeks is a full-service ADU contractor offering planning, design, permitting, and build support. They also provide a $150 online ADU Development Masterclass covering feasibility, financing, and construction, ideal for California homeowners and investors.
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Coronado Construction builds Accessory Dwelling Units (ADUs) in San Diego, CA. From garage conversions to detached units, their ADUs boost property value, generate rental income, and offer flexible living using quality, energy-efficient materials.
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Flip It Homes Inc. is a Southern California ADU builder with 10+ years of experience in garage conversions, new construction ADUs, and home renovations across Los Angeles, San Fernando Valley, and surrounding communities.
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Los Angeles ADU contractor The ADU Builder offers 10+ years of experience in ADU construction, garage conversions, JADUs, custom homes & remodels. They guide clients through design, permits, financing & building with quality craftsmanship.
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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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New Dawn Construction is an ADU contractor specializing in detached ADUs, garage conversions, in-law suites, granny flats, JADUs, and backyard cottages. They guide homeowners through design, permitting, and construction for flexible housing solutions.
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We guide you through design options and material choices, taking precise measurements to create a custom plan that perfectly fits your property. This careful planning ensures that your new ADU will seamlessly blend with your existing space and meet all your functional needs.
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Backyard Homes is a top ADU builder in Sacramento with 80+ completed units. They offer detached, attached, and conversion ADUs, handling design, permitting, and construction for a seamless experience across the greater Sacramento region.
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Alon Design & Remodeling is a leading ADU contractor offering detached, attached, garage conversion, basement, and JADU options. ADUs boost property value, generate rental income, and provide independent living spaces with full amenities.
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GW Construction is a San Diego general contractor specializing in ADU construction, home renovations, custom homes, and commercial projects. Services include garage conversions, backyard cottages, home additions, and multi-unit builds.
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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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Bay Builders & Remodeling specializes in custom ADU construction across Santa Clara, San Mateo, and East Bay. Services include attached, detached, garage conversions, and JADUs, helping homeowners add rental income, family housing, or workspace.
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West Coast ADU is a California-based ADU builder offering prefab & manufactured accessory dwelling units. They help homeowners add rental income, house family members & boost property value with streamlined permitting & construction.
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Proteus Homes is a custom home and ADU builder with 30+ years of experience in the Southwest US. They offer full-service ADU construction, including design, permitting, and panelized off-site fabrication, with move-in-ready homes in under three months.
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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.
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.