Fullerton ADU Builder
5.0 (9 Google reviews)
125 N Euclid St, Fullerton, CA 92832
Serves La Habra · based in FullertonADU specialistHome builder
ADU Builders in La Habra, CA
6 builders · ranked by Google rating and review volume · 4 CSLB license verified
★ Featured ADU builder
Featured ADU builder — this spot is open
Put your ADU company at the top of this page, in front of La Habra homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.
With roughly 63,097 residents at the 2020 Census, La Habra is one of Orange County's established communities. We found 6 ADU builders and contractors that show up for La Habra homeowners on Google Maps, most of them based in nearby communities. Their average Google rating is 4.7 stars. 4 market themselves specifically as ADU builders, and 1 mention garage conversions. 4 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are Fullerton ADU Builder, South Coast Developers Inc and Custom ADU Builder.
In Orange County, HOA and design-standard questions come up often. State law voids CC&Rs that ban ADUs, but HOAs can still apply reasonable objective standards. Compact lots make attached units and garage conversions popular.
No builders match that filter here yet. Try another one.
South Coast Developers Inc
5.0 (4 Google reviews)
✔ CSLB License Verified #1006431417 S Associated Rd UNIT 114, Brea, CA 92821
Serves La Habra · based in BreaRemodels & additionsHome builderGeneral contractor
Custom ADU Builder
5.0 (2 Google reviews)
✔ CSLB License Verified #1101360113 W Santa Fe Ave, Fullerton, CA 92832
Serves La Habra · based in FullertonADU specialist
ADU Contractor & Garage Conversion
5.0 (2 Google reviews)
5440 Beach Blvd B, Buena Park, CA 90621
Serves La Habra · based in Buena ParkADU specialistGarage conversionsHome builder
KoBolt Construction
4.6 (11 Google reviews)
✔ CSLB License Verified #1024785406 E Commonwealth Ave #3, Fullerton, CA 92832
Serves La Habra · based in FullertonRemodels & additionsHome builderGeneral contractor
Apex Construction
3.7 (6 Google reviews)
✔ CSLB License Verified #1020301Service-area business · La Habra
Serves La Habra · based in La HabraADU specialistRemodels & additionsGeneral contractor
Permits and pre-approved plans in La Habra
ADU permits in La Habra go through the city's building or planning department. Under AB 1332, every California city and county had to set up a pre-approved ADU plan program by January 1, 2025, so ask La Habra whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.
Planning an ADU in La Habra? Start here
La Habra ADU FAQ
How many ADU builders serve La Habra?
Our directory lists 6 ADU builders and contractors that appear for La Habra on Google Maps, including companies based in nearby Orange County communities.
Do I need a permit to build an ADU in La Habra?
Yes. ADUs need a building permit from the City of La Habra, which must approve or deny a complete application within 60 days under state law. Many cities also offer pre-approved plans that speed up review.
How much does an ADU cost in La Habra?
Most Southern California detached ADUs land around $350 to $550 per square foot all-in, garage conversions around $200 to $350, and JADUs around $50,000 to $150,000. Use our ADU cost estimator and get three itemized bids.
How are La Habra ADU builders ranked here?
By Google rating weighted by the number of reviews, so a 4.9 with 200 reviews ranks above a 5.0 with 3. Featured placements are clearly labeled and don't affect the organic ranking.