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ADU Builders in Brea, CA

74 builders ยท ranked by Google rating and review volume ยท 41 CSLB license verified

โ˜… Featured ADU builder

Featured ADU builder โ€” this spot is open

Put your ADU company at the top of this page, in front of Brea homeowners who are comparing builders right now. Includes your logo, project photos, a direct call button and a link to your website.

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With roughly 47,325 residents at the 2020 Census, Brea is one of Orange County's established communities. We found 74 ADU builders and contractors that show up for Brea homeowners on Google Maps, 6 of them based in the city itself. Their average Google rating is 4.7 stars. 24 market themselves specifically as ADU builders, and 5 mention garage conversions. 41 have a matched, active CSLB license shown with a verified badge. The top-rated by our review-weighted score are John Christopher Construction, Inc., SouthSTAR Construction and Serhal Builders.

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.

#3

Serhal Builders

5.0 (30 Google reviews)
โœ” CSLB License Verified #1074208

1328 E Orangethorpe Ave, Fullerton, CA 92831

Serves Brea ยท based in Fullerton
Remodels & additionsGeneral contractor
CallWebsiteView profile
#11

Vision ADU

5.0 (14 Google reviews)
โœ” CSLB License Verified #1115842

1440 S State College Blvd #6h, Anaheim, CA 92806

Serves Brea ยท based in Anaheim
ADU specialist
CallWebsiteView profile
#16

JR Elite Builders

5.0 (11 Google reviews)
โœ” CSLB License Verified #1135623

Service-area business ยท Yorba Linda

Serves Brea ยท based in Yorba Linda
Remodels & additionsGeneral contractor
CallWebsiteView profile
#25

Seib Construction

4.8 (17 Google reviews)
โœ” CSLB License Verified #891787

1464 N Batavia St, Orange, CA 92867

Serves Brea ยท based in Orange
Remodels & additionsGeneral contractor
CallWebsiteView profile
#32

ADUscale

5.0 (4 Google reviews)

528 W Hampshire Ave, Anaheim, CA 92805

Serves Brea ยท based in Anaheim
ADU specialistHome builder
CallWebsiteView profile
#35

The ADU Pro

4.7 (15 Google reviews)
โœ” CSLB License Verified #1128679

15338 Central Ave, Chino, CA 91710

Serves Brea ยท based in Chino
ADU specialistHome builderGeneral contractor
CallWebsiteView profile
#48

KoBolt Construction

4.6 (11 Google reviews)
โœ” CSLB License Verified #1024785

406 E Commonwealth Ave #3, Fullerton, CA 92832

Serves Brea ยท based in Fullerton
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#51

FNCC Construction

5.0 (1 Google reviews)

230 N Crescent Way Unit g, Anaheim, CA 92801

Serves Brea ยท based in Anaheim
Remodels & additionsGeneral contractor
CallView profile
#60

Rocport Inc.

4.1 (9 Google reviews)

15059 E Imperial Hwy, La Mirada, CA 90638

Serves Brea ยท based in La Mirada
Remodels & additionsGeneral contractor
CallWebsiteView profile
#62

Apex Construction

3.7 (6 Google reviews)
โœ” CSLB License Verified #1020301

Service-area business ยท La Habra

Serves Brea ยท based in La Habra
ADU specialistRemodels & additionsGeneral contractor
CallWebsiteView profile
#64

J. P Homes

1.0 (1 Google reviews)
โœ” CSLB License Verified #1090320

780 N Euclid St Suite 201, Anaheim, CA 92801

Serves Brea ยท based in Anaheim
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile
#66

Buena Park ADU

No rating yet (0 Google reviews)

6925 Aragon Cir, Buena Park, CA 90620

Serves Brea ยท based in Buena Park
ADU specialistHome builder
CallView profile
#70

Robles Inc ADU

No rating yet (0 Google reviews)

Service-area business ยท La Puente

Serves Brea ยท based in La Puente
ADU specialist
CallView profile
#73

NexaBuild Construction

No rating yet (0 Google reviews)
โœ” CSLB License Verified #1155013

Service-area business ยท Cypress

Serves Brea ยท based in Cypress
Remodels & additionsHome builderGeneral contractor
CallWebsiteView profile

Permits and pre-approved plans in Brea

ADU permits in Brea 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 Brea whether it has approved plans you can use. See our pre-approved plans guide and California ADU law summary.

Planning an ADU in Brea? Start here

How Much Does It Cost to Build an ADU in Southern California?Prefab and Modular ADUs in California: Real Costs, Permits and PitfallsJADU vs ADU in California: Size, Rules, Cost and Which to BuildADU Rental Income and Property Taxes in California: What to Expect

All ADU guides โ†’

Brea ADU FAQ

How many ADU builders serve Brea?

Our directory lists 74 ADU builders and contractors that appear for Brea on Google Maps, including companies based in nearby Orange County communities.

Do I need a permit to build an ADU in Brea?

Yes. ADUs need a building permit from the City of Brea, 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 Brea?

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 Brea 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.

Nearby cities in Orange County

Anaheim 114Santa Ana 97Irvine 107Huntington Beach 88Garden Grove 97Fullerton 23Orange 95Costa Mesa 103Mission Viejo 59Westminster 53Lake Forest 60Newport Beach 96
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