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ADU Builders & Contractors in Santa Ana, CA

Santa Ana offers pre-approved ADU plans and a dedicated FAQ resource to help homeowners navigate the permitting process in Orange County's most densely populated city.

📊 ADU Quick Facts for Santa Ana

Avg. Cost/sqft

$300-$550

Permit Timeline

4-10 weeks

Max Size

1200 sqft

Setbacks

4ft sides

View Santa Ana Planning Department →

Top 541 ADU Contractors in Santa Ana

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#1PACIFIC PLUMBING COMPANY OF SANTA ANA

Santa Ana, CA

Pacific Plumbing Company OF Santa Ana — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 55+ years experience.

View Profile📞 (714) 547 6967
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#2LANCER CONSTRUCTION

Santa Ana, CA

Lancer Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 44+ years experience.

View Profile📞 (714) 329 1466
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#3CUBED M CONSTRUCTION LLC

Santa Ana, CA

Cubed M Construction Llc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction.

View Profile📞 (714) 329 8518
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#4MAHER CONSTRUCTION

Santa Ana, CA

Maher Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 41+ years experience.

View Profile📞 (714) 376 7830
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#5HAUS WERKS INC

Santa Ana, CA

Haus Werks Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (714) 343 3990
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#6CASTAGNA CONSTRUCTION

Santa Ana, CA

Castagna Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (951) 870 3438
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#7SOLO HOMES CORPORATION

Santa Ana, CA

Solo Homes Corporation — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (714) 321 8914
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#8ECO & ASSOCIATES INC

Santa Ana, CA

Eco & Associates Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (714) 289 0995
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#9SEASHORE CONSTRUCTION INC

Santa Ana, CA

Seashore Construction Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 41+ years experience.

View Profile📞 (714) 245 1600
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#10ORANGEWEST MAINTENANCE & CONSTRUCTION CO

Santa Ana, CA

Orangewest Maintenance & Construction CO — licensed ADU contractor in Santa Ana, CA. Detached ADU construction.

View Profile📞 (714) 478 9518
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💰 How Much Does an ADU Cost in Santa Ana?

Garage Conversion

$75,000 - $185,000

Converting existing garage to living space

Detached ADU

$150,000 - $380,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$3,000 - $12,000

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Santa Ana

How much does it cost to build an ADU in Santa Ana?▼
The average cost to build an ADU in Santa Ana ranges from $150,000 to $380,000, or approximately $300 to $550 per square foot. Garage conversions typically cost $75,000 to $185,000.
How long does it take to get an ADU permit in Santa Ana?▼
The ADU permit process in Santa Ana typically takes 4 to 10 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 Santa Ana?▼
In Santa Ana, 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 Santa Ana?▼
Santa Ana 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 Santa Ana?▼
No parking is required for ADUs in Santa Ana 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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