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ADU Builders & Contractors in Irvine, CA

Irvine's master-planned layout and HOA landscape make ADU construction uniquely challenging but rewarding. Costs run $350–$450 per square foot. Units under 750 sq ft avoid impact fees. Top-rated schools and UC Irvine drive rental demand above $2,000/month. California law prohibits HOAs from banning ADUs. An experienced ADU contractor in Irvine navigates the city's design standards to create compliant, property-enhancing units.

📊 ADU Quick Facts for Irvine

Avg. Cost/sqft

$300-$550

Permit Timeline

4-12 weeks

Max Size

1200 sqft

Setbacks

4ft sides

View Irvine Planning Department →

Top 760 ADU Contractors in Irvine

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#1WD CONSTRUCTION

Irvine, CA

WD Construction — licensed ADU contractor in Irvine, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (310) 658 2433
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#2STONE DEVELOPMENT INC

Irvine, CA

Stone Development Inc — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (714) 813 5360
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#3SHAMSAHMADI KAMRAN

Irvine, CA

Shamsahmadi Kamran — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (949) 591 6044
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#4SJ CONSTRUCTION CO

Irvine, CA

SJ Construction CO — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (714) 745 2044
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#5HAKU CONSTRUCTION

Irvine, CA

Haku Construction — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (949) 346 1977
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#6VINCERO CONSTRUCTION & MANAGEMENT LLC

Irvine, CA

Vincero Construction & Management Llc — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (626) 840 4247
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#7LCS CONSTRUCTORS INC

Irvine, CA

Lcs Constructors Inc — licensed ADU contractor in Irvine, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (949) 870 4500
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#8EAMA FLOORING INC

Irvine, CA

Eama Flooring Inc — licensed ADU contractor in Irvine, CA. Detached ADU construction.

View Profile📞 (410) 491 6844
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#9DREAM CUBIC CONSTRUCTION

Irvine, CA

Dream Cubic Construction — licensed ADU contractor in Irvine, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (626) 905 7979
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#10THERRIEN BRIAN ASHLEY

Irvine, CA

Therrien Brian Ashley — licensed ADU contractor in Irvine, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (714) 343 9134
View All 760 Contractors →

💰 How Much Does an ADU Cost in Irvine?

Garage Conversion

$80,000 - $200,000

Converting existing garage to living space

Detached ADU

$150,000 - $400,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$5,000 - $15,000

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Irvine

How much does it cost to build an ADU in Irvine?▼
The average cost to build an ADU in Irvine ranges from $150,000 to $400,000, or approximately $300 to $550 per square foot. Garage conversions typically cost $80,000 to $200,000.
How long does it take to get an ADU permit in Irvine?▼
The ADU permit process in Irvine typically takes 4 to 12 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 Irvine?▼
In Irvine, 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 Irvine?▼
Irvine 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 Irvine?▼
No parking is required for ADUs in Irvine 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)Huntington Beach (667)

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