ADU Contractors near Fullerton, CA
L Square Construction
Irvine, CA 92705
11.5 miles
L Square Construction is an ADU contractor serving Los Angeles & Orange County, CA. They offer full-service design-build ADU solutions including detached units, in-law suites, garage conversions, and energy-efficient builds with solar integrat... read more
South Land Remodeling
15021 Ventura Boulevard, Los Angeles, CA 91403
35.7 miles
South Land Remodeling is an LA-based ADU contractor with 20+ years of experience. They offer full-service ADU construction, garage conversions, room additions, and permit management across Los Angeles and the San Fernando Valley.
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FS Design & Construction
20520 Oxnard Street, Tarzana, CA 91367
40 miles
FS Design & Construction specializes in ADU construction, garage conversions, granny flats, home additions, kitchen & bathroom remodeling, and new construction. They manage design, permitting, and building for residential projects.
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My Space Remodeling Inc.
24313 Main Street, Newhall, CA 91321
48.4 miles
My Space Remodeling Inc. is a licensed ADU contractor in Westlake Village, CA, specializing in ADU design, construction, and garage conversions. They offer free estimates, financing, and hold an A+ BBB rating.
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Next Level ADU Builders
8520 Florence Avenue, Downey, CA 90240
12 miles
Next Level ADU Builders, serving Los Angeles, Riverside & Pico Rivera since 1997, specializes in ADU construction—detached units, granny flats & casitas—plus HVAC, remodeling & roofing, with financing options available.
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All Inclusive ADU
4041 Macarthur Boulevard, Newport Beach, CA 92660
15.8 miles
All Inclusive ADU is a licensed ADU contractor serving Orange, Riverside, Los Angeles & San Diego Counties. They offer full-service ADU construction including detached ADUs, garage conversions & JADUs with fixed pricing and a 365-day warra... read more
Pasadena Master ADU Builder
930 East Colorado Boulevard, Pasadena, CA 91106
21 miles
Pasadena Master ADU Builder is a top ADU contractor in San Gabriel Valley, offering detached ADUs, garage conversions, and JADUs. With 20+ years experience, 150+ projects, and 98% satisfaction, they deliver compliant, high-quality builds boosting ... read more
RIA Group Construction
26632 Towne Centre Dr # 300, Foothill Ranch, CA 92610
20.8 miles
RIA Group Construction (CA Lic. #1143899) is a full-service design-build contractor in Orange County, CA. Specializing in home renovations, new builds, ADUs, kitchen & bathroom remodeling, and pool construction.
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John Christopher Construction
2246 Newport Blvd Unit A, Costa Mesa, CA 92627
15 miles
John Christopher Construction is a Southern California general contractor specializing in ADU design and building. Serving Huntington Beach, Newport Beach, Costa Mesa & more, they offer custom and pre-engineered ADU plans for rental units, in-... read more
SKS Construction
6445 Sepulveda Boulevard, Van Nuys, CA 91411
37.3 miles
SKS Construction, founded in 1987 in Los Angeles, offers ADU construction, seismic retrofitting, balcony inspections (SB 326 & SB 721 compliance), and structural engineering. With 200+ projects and 80% repeat clients, they deliver expert desig... read more
UADU
1702 S. Robertson Blvd. #177, Los Angeles, CA 90035
28.8 miles
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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OC Builders Group
600 West Santa Ana Boulevard, Santa Clara, CA 92701
10 miles
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 va... read more
Bourke Construction
30802 South Coast Hwy, Laguna Beach, CA 92651
27.1 miles
Bourke Construction builds custom ADUs in Orange County, including detached units, garage conversions, and JADUs. They manage design, permits, and construction, helping homeowners add rental income, multi-generational living space, or property val... read more
Downey ADU Builders
8607 Imperial Highway, Downey, CA 90242
11.3 miles
Downey ADU Builders offers expert ADU contractor services including detached ADUs, garage conversions, attached ADUs, JADUs, and home additions. Licensed contractors handle permits, design, and construction with 10+ years of experience.
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Oasis Builders
11500 West Olympic Boulevard, Los Angeles, CA 90064
31.4 miles
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 & ... read more
Other cities in California
What you need to know
ADU Contractors in Fullerton, CA: Building in a Historic and Vibrant City
Fullerton, California, is a city known for its rich historic downtown, thriving arts scene, and a large student population thanks to California State University, Fullerton (CSUF). With a growing demand for housing and a diverse mix of older single-family homes and newer developments, ADU contractors in Fullerton are in high demand. The city's unique blend of historic neighborhoods and modern development makes accessory dwelling units (ADUs) an attractive solution for homeowners looking to add rental income, house family members, or increase property value.
Fullerton ADU Regulations and Zoning Requirements
ADU contractors working in Fullerton must navigate both California state ADU laws and the City of Fullerton's local ordinances. Fullerton falls under the jurisdiction of Orange County and follows state guidelines under AB 68, AB 881, and SB 13, which streamlined ADU approvals across California. Key regulations that experienced Fullerton ADU contractors must be familiar with include:
- Setback requirements: ADUs in Fullerton generally require a minimum 4-foot side and rear setback.
- Height limits: Detached ADUs are typically limited to 16 feet in height, though this can vary based on proximity to the main dwelling.
- Maximum ADU size: Detached ADUs can be up to 1,200 square feet, while attached ADUs are limited to 50% of the primary dwelling's square footage.
- Owner-occupancy rules: As of 2020, California law removed owner-occupancy requirements for ADUs built before 2025, giving Fullerton homeowners more flexibility.
- Parking requirements: In many cases, especially near transit corridors, parking requirements for ADUs may be waived.
Types of ADUs Built by Fullerton Contractors
Skilled ADU builders in Fullerton offer a variety of ADU types to suit different property layouts and homeowner needs. Given the prevalence of older ranch-style homes and bungalows in neighborhoods like Sunny Hills and Raymond Hills, garage conversions and detached backyard cottages are especially popular. Common ADU types include:
- Detached ADUs (backyard cottages or casitas)
- Attached ADUs (additions to the primary home)
- Garage conversion ADUs (converting existing garages into living spaces)
- Junior ADUs (JADUs) — up to 500 sq ft within the existing home footprint
Why Hire a Local Fullerton ADU Contractor?
Hiring a local ADU contractor in Fullerton ensures that your project is handled by professionals who understand the City of Fullerton's permitting process, building department requirements, and inspection protocols. Local contractors are familiar with the Fullerton Building and Safety Division and can efficiently manage permit applications, plan checks, and construction timelines. Whether you're near the CSUF campus looking to create student housing or in a quiet residential neighborhood seeking a multigenerational living solution, a qualified Fullerton ADU contractor can help you maximize your property's potential while staying fully compliant with all local and state regulations.