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ADU Builders & Contractors in Claremont, CA

With 82 verified ADU contractors serving Claremont, CA, homeowners have plenty of options for their accessory dwelling unit project. Local contractors ready to help specialize in everything from design-build to permit navigation.

📊 ADU Quick Facts for Claremont

Avg. Cost/sqft

$197-$372

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 82 ADU Contractors in Claremont

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#1IN A FIX

Claremont, CA

IN A Fix — licensed ADU contractor in Claremont, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (909) 964 7930
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#2ROMANO REX J

Claremont, CA

Romano Rex J — licensed ADU contractor in Claremont, CA. Detached ADU construction. 26+ years experience.

View Profile📞 (909) 626 3019
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#32 AS PROPERTY MANAGEMENT & REMODEL CORP

Claremont, CA

2 AS Property Management & Remodel Corp — licensed ADU contractor in Claremont, CA. Detached ADU construction.

View Profile📞 (909) 706 8892
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#4KITCHEN MEDIC HOME REMODELING LLC

Claremont, CA

Kitchen Medic Home Remodeling Llc — licensed ADU contractor in Claremont, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (909) 267 9943
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#5GOOLER CONSTRUCTION

Claremont, CA

Gooler Construction — licensed ADU contractor in Claremont, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (626) 407 6413
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#6MULTI-ENGINEERING CORPORATION

Claremont, CA

Multi-Engineering Corporation — licensed ADU contractor in Claremont, CA. Detached ADU construction.

View Profile📞 (951) 805 3005
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#7WALTON ELECTRIC CORPORATION

Claremont, CA

Walton Electric Corporation — licensed ADU contractor in Claremont, CA. Detached ADU construction. 40+ years experience.

View Profile📞 (909) 981 5051
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#8RANK-1 CONSTRUCTION CO

Claremont, CA

Rank-1 Construction CO — licensed ADU contractor in Claremont, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (626) 672 5972
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#9WANG YI

Claremont, CA

Wang YI — licensed ADU contractor in Claremont, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (909) 979 0086
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#10CONSTRUCTION SERVICES BY MICHAEL J GATTI INC

Claremont, CA

Construction Services BY Michael J Gatti Inc — licensed ADU contractor in Claremont, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (909) 731 9040
View All 82 Contractors →

💰 How Much Does an ADU Cost in Claremont?

Garage Conversion

$68,500 - $128,500

Converting existing garage to living space

Detached ADU

$147,000 - $322,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,108 - $5,108

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Claremont

How much does it cost to build an ADU in Claremont?▼
The average cost to build an ADU in Claremont ranges from $147,000 to $322,000, or approximately $197 to $372 per square foot. Garage conversions typically cost $68,500 to $128,500.
How long does it take to get an ADU permit in Claremont?▼
The ADU permit process in Claremont 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 Claremont?▼
In Claremont, 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 Claremont?▼
Claremont 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 Claremont?▼
No parking is required for ADUs in Claremont 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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