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ADU Builders & Contractors in Brea, CA

Building an ADU in Brea? You'll find 174 licensed contractors in the area, ready to help. Brea's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for Brea

Avg. Cost/sqft

$196-$371

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 174 ADU Contractors in Brea

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#1SOLILO CONSTRUCTION

Brea, CA

Solilo Construction — licensed ADU contractor in Brea, CA. Detached ADU construction. 16+ years experience.

View Profile📞 (714) 863 8709
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#2THOMAS F M AIR CONDITIONING INC

Brea, CA

Thomas F M Air Conditioning Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 50+ years experience.

View Profile📞 (714) 738 1062
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#3BUILDING CONSTRUCTION SPECIALTIES INC

Brea, CA

Building Construction Specialties Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 257 7911
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#4SOUTH COAST DEVELOPERS INC

Brea, CA

South Coast Developers Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (714) 716 4376
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#5GRIFFITH / DUTRA JOINT VENTURE

Brea, CA

Griffith / Dutra Joint Venture — licensed ADU contractor in Brea, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (714) 984 5500
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#6BERGMAN BUILD,LLC

Brea, CA

Bergman Build,Llc — licensed ADU contractor in Brea, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (714) 924 7000
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#7TAURUS TERMITE INC

Brea, CA

Taurus Termite Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (714) 993 1161
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#8CONTRACT SERVICES GROUP INC

Brea, CA

Contract Services Group Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 19+ years experience.

View Profile📞 (714) 582 1807
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#9FOYEL R E INC

Brea, CA

Foyel R E Inc — licensed ADU contractor in Brea, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (626) 931 6159
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#10ALL INCLUSIVE CONSTRUCTION SERVICES

Brea, CA

All Inclusive Construction Services — licensed ADU contractor in Brea, CA. Detached ADU construction.

View Profile📞 (714) 987 3855
View All 174 Contractors →

💰 How Much Does an ADU Cost in Brea?

Garage Conversion

$68,000 - $128,000

Converting existing garage to living space

Detached ADU

$146,000 - $321,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,114 - $5,114

Plan check, permits, utility connections

* Costs vary based on size, finishes, site conditions, and contractor. Get quotes from multiple Brea contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Brea

How much does it cost to build an ADU in Brea?▼
The average cost to build an ADU in Brea ranges from $146,000 to $321,000, or approximately $196 to $371 per square foot. Garage conversions typically cost $68,000 to $128,000.
How long does it take to get an ADU permit in Brea?▼
The ADU permit process in Brea typically takes 60 to 120 weeks. California law requires cities to approve or deny ADU permits within 60 days of receiving a complete application.
What are the ADU size limits in Brea?▼
In Brea, detached ADUs can be up to 1200 square feet. Attached ADUs are limited to 50% of the primary dwelling or 1,200 sqft, whichever is less. Junior ADUs (JADUs) are limited to 500 sqft and must be within the existing home.
What is the setback requirement for ADUs in Brea?▼
Brea requires 4-foot setbacks from side property lines and 4-foot setbacks from rear property lines for new ADU construction. Converted structures (like existing garages) may maintain their current setbacks.
Do I need to provide parking for my ADU in Brea?▼
No parking is required for ADUs in Brea if your property is within half a mile of public transit, in a historic district, part of an existing multi-family building, or if the ADU is a garage conversion. Otherwise, one space may be required.

Also See ADU Contractors In

Los Angeles (3215)San Diego (2582)San Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)

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