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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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#1C J W / M Z T A JOINT VENTURE

Santa Ana, CA

C J W / M Z T A Joint Venture — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (714) 835 6820
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#2INLAND EMPIRE CONSTRUCTION

Santa Ana, CA

Inland Empire Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (909) 488 1040
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#3VHD CONSTRUCTION INC

Santa Ana, CA

Vhd Construction Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 5+ years experience.

View Profile📞 (909) 632 3560
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#4J W H CONTRACTING

Santa Ana, CA

J W H Contracting — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 32+ years experience.

View Profile📞 (949) 232 5572
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#5ILEANA'S CONSTRUCTION COMPANY

Santa Ana, CA

Ileana'S Construction Company — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 26+ years experience.

View Profile📞 (714) 746 3193
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#6WUNNING CONSTRUCTION

Santa Ana, CA

Wunning Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (714) 313 4582
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#7H P L MECHANICAL INC

Santa Ana, CA

H P L Mechanical Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 50+ years experience.

View Profile📞 (714) 541 0220
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#8S A S CONSTRUCTION

Santa Ana, CA

S A S Construction — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (949) 800 9247
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#9RIGGINS CONSTRUCTION & MANAGEMENT INC

Santa Ana, CA

Riggins Construction & Management Inc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction. 48+ years experience.

View Profile📞 (714) 953 6333
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#10TRIPLE G CONSTRUCTION LLC

Santa Ana, CA

Triple G Construction Llc — licensed ADU contractor in Santa Ana, CA. Detached ADU construction.

View Profile📞 (714) 651 0437
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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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