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ADU Builders & Contractors in Huntington Beach, CA

Huntington Beach ADU projects face Coastal Zone permitting for many properties, though AB 462 streamlined coastal ADU permits in 2025. Construction costs average $300–$400 per square foot. Salt air demands corrosion-resistant materials and marine-grade hardware throughout. With beachside ADU rentals commanding $2,200–$3,200/month, an ADU contractor in Huntington Beach specializing in coastal builds protects your investment.

📊 ADU Quick Facts for Huntington Beach

Avg. Cost/sqft

$300-$550

Permit Timeline

4-12 weeks

Max Size

1200 sqft

Setbacks

4ft sides

View Huntington Beach Planning Department →

Top 667 ADU Contractors in Huntington Beach

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#1MCGAVRAN CONSTRUCTION

Huntington Beach, CA

Mcgavran Construction — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 366 3383
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#2CUSTOM NEST LLC

Huntington Beach, CA

Custom Nest Llc — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction.

View Profile📞 (714) 249 5082
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#3THE STORE CARE SPECIALISTS INC

Huntington Beach, CA

The Store Care Specialists Inc — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 375 0301
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#4RARE EARTH SYSTEMS CONSTRUCTION LANDSCAPE COMPANY

Huntington Beach, CA

Rare Earth Systems Construction Landscape Company — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction.

View Profile📞 (949) 491 5944
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#5ZIETHING ANDY - GENERAL CONTRACTOR

Huntington Beach, CA

Ziething Andy - General Contractor — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 35+ years experience.

View Profile📞 (714) 448 7924
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#6NEAL TIM CONSTRUCTION

Huntington Beach, CA

Neal Tim Construction — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 43+ years experience.

View Profile📞 (714) 904 2927
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#7SURF CITY HANDYWORKS

Huntington Beach, CA

Surf City Handyworks — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (714) 585 3217
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#8C M T HOME IMPROVEMENT

Huntington Beach, CA

C M T Home Improvement — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (949) 525 7297
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#9FLAWLESS FRAMING SYSTEMS

Huntington Beach, CA

Flawless Framing Systems — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (310) 954 6561
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#10AAADVANTAGE CONSTRUCTION CO

Huntington Beach, CA

Aaadvantage Construction CO — licensed ADU contractor in Huntington Beach, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (714) 719 3765
View All 667 Contractors →

💰 How Much Does an ADU Cost in Huntington Beach?

Garage Conversion

$80,000 - $190,000

Converting existing garage to living space

Detached ADU

$150,000 - $400,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$4,000 - $12,000

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Huntington Beach

How much does it cost to build an ADU in Huntington Beach?▼
The average cost to build an ADU in Huntington Beach ranges from $150,000 to $400,000, or approximately $300 to $550 per square foot. Garage conversions typically cost $80,000 to $190,000.
How long does it take to get an ADU permit in Huntington Beach?▼
The ADU permit process in Huntington Beach 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 Huntington Beach?▼
In Huntington Beach, 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 Huntington Beach?▼
Huntington Beach 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 Huntington Beach?▼
No parking is required for ADUs in Huntington Beach 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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