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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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#1BUILT RENOVATION

Seal Beach, CA

Built Renovation — licensed ADU contractor in Seal Beach, CA. Detached ADU construction.

View Profile📞 (714) 594 9740
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#2TRI COR CONSTRUCTION INC

Seal Beach, CA

Tri Cor Construction Inc — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 38+ years experience.

View Profile📞 (714) 745 8665
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#3FUNK BRADLEY DEVLIN CONSTRUCTION CO

Seal Beach, CA

Funk Bradley Devlin Construction CO — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 38+ years experience.

View Profile📞 (562) 248 3696
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#4KELLOGG CONSTRUCTION INC

Seal Beach, CA

Kellogg Construction Inc — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (562) 493 8630
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#5THE FIX ALL

Seal Beach, CA

The Fix All — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (310) 995 0810
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#6POWELSON JOHN

Seal Beach, CA

Powelson John — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 23+ years experience.

View Profile📞 (714) 305 5532
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#7COSTER CONSTRUCTION

Seal Beach, CA

Coster Construction — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (562) 522 2020
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#8GARCIA - YANEZ JOSE

Seal Beach, CA

Garcia - Yanez Jose — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (562) 519 4010
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#9MC INERNEY J J

Seal Beach, CA

MC Inerney J J — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 31+ years experience.

View Profile📞 (562) 594 0306
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#10RISTOW CONSTRUCTION

Seal Beach, CA

Ristow Construction — licensed ADU contractor in Seal Beach, CA. Detached ADU construction. 36+ years experience.

View Profile📞 (562) 493 6500
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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