California Construction Center Inc. specializes in garage conversions and ADU services in Concord and San Francisco County. They transform garages into guest suites, rental units, and home offices, ensuring code compliance and quality craftsmanship.
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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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RD Fast Construction offers ADU garage conversions in Los Angeles, helping homeowners add property value, rental income, guest space, or housing for adult children using existing infrastructure for cost-effective results.
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Heart Construction builds ADUs in Los Angeles, offering detached, attached, garage conversions, JADUs & more. Full-service from permits to completion. Ideal for rental income, multigenerational living & property value growth.
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ADU Garage Experts, a Southern California structural engineering firm, specializes in ADU planning and drafting. They offer garage conversions from ~$70/sqft, attached and detached ADUs, helping homeowners add rental income or living space.
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MyADU4Less is a Southern California ADU builder specializing in prefabricated accessory dwelling units. Offering models from 160–1,200 sq ft, they handle design, permitting, and construction. CalHFA grants up to $40,000 may apply.
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OC Builders Group specializes in ADU construction in California, offering detached ADUs, garage conversions, granny flats & in-law suites. They help homeowners navigate permits, zoning & state regulations to add rental income or housing value.
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Rockwood Homes Inc., based in Torrance, CA, specializes in ADU construction, garage conversions, and home remodeling across Los Angeles County, serving cities like Long Beach, Downey, and Whittier.
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Leonard Garage Conversion is a trusted ADU contractor in Los Angeles with 20+ years of experience. Specializing in garage conversions, granny flats, and JADUs, they offer quality builds, code compliance, and competitive pricing.
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Eric Go Build (EG'S Built Construction) specializes in ADU construction, offering custom granny flats, in-law suites & backyard cottages. They provide tailored designs, quality materials & timely delivery to boost property value.
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Pixel Arch LLC, Glendale CA, offers residential architecture services including custom home design, ADUs, garage conversions, duplexes & remodeling. Permit-ready plans, Title 24 reports & 3D renderings for California clients.
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Oasis Builders is a trusted ADU contractor serving Greater Los Angeles, specializing in detached ADUs, attached ADUs, and garage conversions. Costs range from $100K–$300K, with timelines of 6–12 months. Full-service: permits, blueprints & turnkey construction.
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K&S Design Build specializes in ADU construction and garage conversions, offering full design-build services from concept to completion. They handle permits, city regulations, and create granny flats, in-law suites, backyard cottages, and rental units.
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Structura Remodeling is an LA-based licensed ADU contractor specializing in Accessory Dwelling Units, garage conversions & JADUs. Costs range $115K–$145K. Financing options include HELOC & construction loans. Free consultation available.
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Musick Construction Inc. offers ADU construction services including new builds and conversions like garage and basement conversions. They handle permits, design, and finishes for granny flats, in-law suites, and rental units.
read moreIrvine, California is one of the most meticulously planned cities in the United States, developed largely by the Irvine Company with strict architectural guidelines and community standards. This unique characteristic makes hiring experienced ADU contractors in Irvine especially important. Unlike many other Southern California cities, Irvine's neighborhoods are governed not only by city zoning codes but also by Homeowners Associations (HOAs), which can impose additional design requirements, material restrictions, and approval processes on top of standard city permits.
Irvine follows California state ADU law, which was significantly expanded through legislation including AB 68, AB 881, and SB 13. Under these laws, homeowners in Irvine can build Accessory Dwelling Units (ADUs) and Junior ADUs (JADUs) on single-family and multifamily lots. Key local regulations include:
One of the most significant challenges for ADU construction in Irvine is navigating HOA restrictions. Many Irvine communities — including those in Woodbridge, Northwood, Turtle Rock, and Quail Hill — have active HOAs with architectural review committees. While California law (Civil Code Section 4751) limits HOAs from outright prohibiting ADUs, they can still regulate exterior appearance, materials, colors, and landscaping. A knowledgeable Irvine ADU contractor will manage both city permit submissions and HOA architectural review applications simultaneously to avoid costly delays.
Given Irvine's suburban layout and lot sizes, the most common ADU types built by local contractors include:
When selecting an ADU contractor in Irvine, California, homeowners should look for professionals with proven experience in local permitting, HOA compliance, and California Title 24 energy code requirements. The best contractors will handle everything from design and engineering to permit submission and final inspection. With Irvine's strong rental market and high property values, a well-built ADU can offer significant return on investment while adding functional living space to your property.