Ivy Builders is a top ADU contractor in Los Angeles & Orange County, specializing in detached ADUs, granny flats & backyard cottages. Offering pre-approved plans, full permitting, and custom builds ranging from $200K–$500K.
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Okopod's 215 ft² backyard studio ADU features a dual pitch standing seam roof, Natural Thermowood cladding, aluminum doors, a full bathroom, and an anthracite grey pergola with adjustable louvres and slab flooring.
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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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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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ADU Professionals, Corona CA, builds custom Accessory Dwelling Units since 1999. Offering floor plans from 500–1,200 sq ft, including detached ADUs, granny flats & in-law suites for rental income or multigenerational living.
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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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The ADU Pro® is a licensed ADU contractor in Chino, CA, serving Fontana and Southern California. Specializing exclusively in ADU construction, they offer detached ADUs, garage conversions, and granny flats with a lifetime transferable warranty.
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Our Expert Team offers dependable expert services on short notice because of our extensive network of employees and sub-contractors located throughout California. Our teams of respectable employees are always willing to help accommodate our customer’s needs, by going the extra mile, especially when it comes to meeting those critical deadlines.
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California Dream Builders specializes in ADU design and construction, offering end-to-end services including architectural design, permitting, and full construction management. They build detached ADUs, granny flats, in-law suites, and backyard cottages across California.
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Block Contracting specializes in crafting the best Accessory Dwelling Units (ADUs) in Oceanside, CA. Our designs are meant to enhance your property’s value and functionality. Whether you’re seeking a modern guest house, a stylish rental unit, pool house, or a versatile space for family.
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UADU is a California ADU contractor offering garage conversions, detached, attached, and two-story ADUs. They handle design, permits, and construction. Free feasibility checks available. Projects typically take 4–6 months.
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PacGen Construction is a Temecula-based ADU contractor specializing in granny flats, casitas, and in-law suites. They offer full design-build services, permitting assistance, and custom ADU construction for homeowners seeking rental income or extra living space.
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.