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ADU Builders & Contractors in Seal Beach, CA

Seal Beach, CA homeowners looking to build an ADU have 66 licensed contractors to choose from, ready to help. Whether you're planning a garage conversion, detached ADU, or junior ADU, finding the right contractor in Seal Beach starts here.

📊 ADU Quick Facts for Seal Beach

Avg. Cost/sqft

$193-$368

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 66 ADU Contractors in Seal Beach

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#1GHBB CONSTRUCTION

Seal Beach, CA

Ghbb Construction — licensed ADU contractor in Seal Beach, CA. Detached ADU construction.

View Profile📞 (562) 666 9754
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#2KELLER BUILDERS

Seal Beach, CA

Keller Builders — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 35+ years experience.

View Profile📞 (562) 212 4037
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#3OLSON URBAN HOUSING L P

Seal Beach, CA

Olson Urban Housing L P — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 16+ years experience.

View Profile📞 (562) 370 9315
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#4ECOBUILDER

Seal Beach, CA

Ecobuilder — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 19+ years experience.

View Profile📞 (562) 507 1350
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#5CASA BY THE SEA

Seal Beach, CA

Casa BY The Sea — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (562) 756 7380
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#6AEC DEVELOPMENT INC

Seal Beach, CA

Aec Development Inc — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (949) 577 0174
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#7J M C BUILDERS INC

Seal Beach, CA

J M C Builders Inc — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (562) 987 9663
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#8JOHNSON MICHAEL

Seal Beach, CA

Johnson Michael — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 393 0874
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#9KANG'S CONSTRUCTION INC

Seal Beach, CA

Kang'S Construction Inc — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (562) 965 5524
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#10BEAVER GREG CONSTRUCTION

Seal Beach, CA

Beaver Greg Construction — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (714) 305 8534
View All 66 Contractors →

💰 How Much Does an ADU Cost in Seal Beach?

Garage Conversion

$66,500 - $126,500

Converting existing garage to living space

Detached ADU

$143,000 - $318,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,101 - $5,101

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Seal Beach

How much does it cost to build an ADU in Seal Beach?▼
The average cost to build an ADU in Seal Beach ranges from $143,000 to $318,000, or approximately $193 to $368 per square foot. Garage conversions typically cost $66,500 to $126,500.
How long does it take to get an ADU permit in Seal Beach?▼
The ADU permit process in Seal Beach 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 Seal Beach?▼
In Seal 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 Seal Beach?▼
Seal 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 Seal Beach?▼
No parking is required for ADUs in Seal 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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