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ADU Builders & Contractors in Santa Monica, CA

Building an ADU in Santa Monica? You'll find 274 licensed contractors in the area, ready to help. Santa Monica's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for Santa Monica

Avg. Cost/sqft

$193-$368

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 274 ADU Contractors in Santa Monica

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#1CORR CONTEMPORARY HOMES LLC

Santa Monica, CA

Corr Contemporary Homes Llc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (310) 994 5755
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#2HOFFMANN STRUCTURE INC

Santa Monica, CA

Hoffmann Structure Inc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 27+ years experience.

View Profile📞 (310) 774 9159
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#3AMIN DEVELOPMENT INC

Santa Monica, CA

Amin Development Inc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (310) 587 2270
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#424 PREFAB LLC

Santa Monica, CA

24 Prefab Llc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (310) 243 6967
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#5BARNDT CONSTRUCTION

Santa Monica, CA

Barndt Construction — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 32+ years experience.

View Profile📞 (310) 925 2511
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#6GO BUILDING SYSTEMS INC

Santa Monica, CA

GO Building Systems Inc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction.

View Profile📞 (310) 629 3009
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#7KENT MICHAEL J INC

Santa Monica, CA

Kent Michael J Inc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 37+ years experience.

View Profile📞 (310) 293 7041
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#8NUWI CAPITAL INC

Santa Monica, CA

Nuwi Capital Inc — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 31+ years experience.

View Profile📞 (310) 394 3379
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#9ACCURATE CONSTRUCTION

Santa Monica, CA

Accurate Construction — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (310) 299 2829
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#10GIBSON GORDON CONSTRUCTION

Santa Monica, CA

Gibson Gordon Construction — licensed ADU contractor in Santa Monica, CA. Detached ADU construction. 38+ years experience.

View Profile📞 (310) 396 9310
View All 274 Contractors →

💰 How Much Does an ADU Cost in Santa Monica?

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

$1,097 - $5,097

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Santa Monica

How much does it cost to build an ADU in Santa Monica?▼
The average cost to build an ADU in Santa Monica 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 Santa Monica?▼
The ADU permit process in Santa Monica 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 Santa Monica?▼
In Santa Monica, 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 Monica?▼
Santa Monica 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 Monica?▼
No parking is required for ADUs in Santa Monica 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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