ADU Contractors near Costa Mesa, CA
IBA Builders
13743 Ventura Boulevard, Sherman Oaks, CA 91423
45.2 miles
Garage conversion to ADU in Los Angeles requires structural upgrades, permits, and utility connections. IBA Builders evaluates ceiling height, slab condition, setbacks, and utility access before design begins, ensuring code compliance and accurate... read more
R Remodeling
6745 Washington Avenue, Whittier, CA 90601
20 miles
R Remodeling is a trusted ADU contractor in Whittier, specializing in accessory dwelling units for added living space or rental income. Experienced in detached ADUs, they manage projects from consultation to completion with minimal property disrup... read more
Construction Masters
18075 Ventura Boulevard, Los Angeles, CA 91316
49.3 miles
Construction Masters™ is a trusted ADU contractor offering full-service design, engineering, and construction of accessory dwelling units. They build granny flats, in-law suites, and detached ADUs, boosting property value with a free consultatio... read more
Addition Builders La
1352 Palms Blvd, Los Angeles, CA 90291
41.6 miles
Addition Builders LA is a full-service ADU contractor in Los Angeles offering custom ADUs, prefab units, and garage conversions. Licensed, bonded, and insured, they manage design to construction, completing projects in as little as nine months wit... read more
Structura Remodeling
1702 South Robertson Boulevard, Los Angeles, CA 90035
34.7 miles
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.... read more
MTZ Contractors
3515 Atlantic Avenue, Long Beach, CA 90807
18.5 miles
Looking for the best ADU construction? Choose Mtz Contractors Inc to completely transform your property, known for constructing excellent ADUs in Long Beach CA. We create and build Accessory Dwelling Units that meet your precise requirements for q... read more
Heart Construction
10867 Fruitland Drive, Studio City, CA 91604
41.8 miles
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.
read more
Ultra-Unit Architectural Studio
1327 Loma Avenue, Long Beach, CA 90804
16 miles
Ultra-Unit Architectural Studio, based in Long Beach, CA, offers architecture and construction services for ADUs, residential, multifamily, and commercial projects. Led by Cameron Crockett AIA, LEED, with 25+ years experience. Free initial consult... read more
ADU Design Homes
2610 Pacific Avenue, Manhattan Beach, CA 90266
32.3 miles
ADU Design Homes is a full-service ADU design and build firm in Los Angeles and Orange County. They handle detached ADUs, JADUs, garage conversions, permitting, engineering, and construction under one roof.
read more
iHome Design & Remodel
614 South Euclid Street, Fullerton, CA 92832
13.8 miles
iHome Design & Remodel specializes in custom ADU and casita construction, offering full-service builds from design to completion. Services include garage conversions, detached ADUs, permit handling, and free 3D consultations for homeowners.read more
OC Master ADU Construction
809 East Katella Avenue, Orange, CA 92867
10.7 miles
OC Master ADU Construction builds ADUs across Orange County, offering detached units, garage conversions, JADUs & attached additions. Services include design, permitting & full construction management for rental income or family housing.read more
Bela Development
1023 Abbot Kinney Boulevard, Venice, CA 90291
39 miles
Bela Development is an LA-based design-build firm with 15+ years specializing in ADU construction, garage conversions, detached ADUs, and JADUs. They manage design, permitting, and build under one roof, delivering legal living spaces that boost pr... read more
Go Home Builders
15132 Ventura Boulevard, Sherman Oaks, CA 91403
45.5 miles
GO Home Builders is a licensed LA construction company specializing in custom homes, ADUs, garage conversions, fire rebuilds, and remodels. Their design-build model streamlines permitting, zoning, and construction across Los Angeles and LA County.
read more
Diditan Group
5632 Van Nuys Boulevard, Sherman Oaks, CA 91401
45.9 miles
Diditan Group is a Los Angeles ADU contractor offering garage conversions, granny flats, JADUs & detached ADUs. They manage design, permitting & construction, helping homeowners add value & livable space.
read more
ADU Resource Center
600 North Brand Boulevard, Glendale, CA 91203
39 miles
ADU Resource Center is a Glendale, CA-based ADU contractor with 600+ completed units. They offer full-service ADU building, including design, permitting, financing, and construction of detached, attached, and garage conversion ADUs across Southern... read more
Other cities in California
What you need to know
ADU Contractors in Costa Mesa: Building in Orange County's Creative Hub
Costa Mesa, California, is a vibrant city in Orange County known for its thriving arts scene, proximity to South Coast Plaza, and diverse residential neighborhoods. As housing demand continues to surge across Southern California, ADU contractors in Costa Mesa are playing a critical role in helping homeowners maximize their property value and create additional living space. Whether you live near the Eastside neighborhoods, Mesa Verde, or College Park, adding an Accessory Dwelling Unit (ADU) is one of the smartest investments a Costa Mesa homeowner can make.
Costa Mesa ADU Regulations and Zoning Requirements
Before breaking ground, it's essential to understand the local rules that govern ADU construction in Costa Mesa. The city follows California state ADU law while also enforcing its own municipal guidelines through the Costa Mesa Community Development Department. Key regulations include:
- ADUs are permitted in all single-family and multifamily residential zones
- Detached ADUs can be up to 1,200 square feet in size
- Setback requirements typically require a minimum of 4 feet from rear and side property lines
- Junior ADUs (JADUs) up to 500 square feet may be created within the existing primary dwelling
- Owner-occupancy requirements have been suspended under current California state law through 2025
- ADUs must comply with Costa Mesa's building codes, fire safety standards, and utility connection requirements
Working with an experienced ADU contractor in Costa Mesa ensures that your project meets all local and state requirements, avoiding costly delays or permit rejections.
Types of ADUs Popular in Costa Mesa
Costa Mesa's mix of mid-century homes, bungalows, and larger lot properties makes it well-suited for a variety of ADU types. The most common projects undertaken by Costa Mesa ADU contractors include:
- Detached ADUs: Standalone structures built in the backyard, ideal for rental income or multigenerational living
- Garage Conversions: Transforming existing attached or detached garages into fully livable units
- Attached ADUs: Extensions built onto the side or rear of the primary home
- Junior ADUs (JADUs): Smaller units carved out of existing interior space, often with a separate entrance
Why Hire a Local Costa Mesa ADU Contractor?
Hiring a licensed ADU contractor familiar with Costa Mesa is crucial for a smooth construction process. Local contractors understand the nuances of the city's permit process, have established relationships with the Community Development Department, and are knowledgeable about neighborhood-specific considerations such as HOA rules in areas like Mesa Verde. A qualified contractor will handle everything from architectural design and permit applications to construction and final inspections.
With Costa Mesa's strong rental market driven by its proximity to UC Irvine, John Wayne Airport, and major employment centers, an ADU can generate significant monthly rental income. Contact a trusted Costa Mesa ADU contractor today to explore your options and start the journey toward expanding your property's potential.