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ADU Builders & Contractors in Duarte, CA

With 44 verified ADU contractors serving Duarte, 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 Duarte

Avg. Cost/sqft

$198-$373

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 44 ADU Contractors in Duarte

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#1CALIFORNIA STARS CONSTRUCTION & REMODELING INC

Duarte, CA

California Stars Construction & Remodeling Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (626) 358 9200
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#2COLLECTIVE CONSTRUCTION INC THE

Duarte, CA

Collective Construction Inc The — licensed ADU contractor in Duarte, CA. Detached ADU construction.

View Profile📞 (626) 823 8294
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#3O'NEILL ELECTRIC INC

Duarte, CA

O'Neill Electric Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (626) 644 8742
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#4REVOLUTION CONSTRUCTION INC

Duarte, CA

Revolution Construction Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction.

View Profile📞 (626) 672 5931
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#5LOFTI CONSTRUCTION DESIGN BUILD INC

Duarte, CA

Lofti Construction Design Build Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction. 5+ years experience.

View Profile📞 (626) 531 7626
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#6MORA WOODCRAFT

Duarte, CA

Mora Woodcraft — licensed ADU contractor in Duarte, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (626) 644 1481
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#7FISCHER CHUCK TRINITY CONSTRUCTION INC

Duarte, CA

Fischer Chuck Trinity Construction Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction. 46+ years experience.

View Profile📞 (626) 305 4011
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#8SERVPRO OF ARCADIA & PASADENA NORTH

Duarte, CA

Servpro OF Arcadia & Pasadena North — licensed ADU contractor in Duarte, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (626) 447 4111
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#9LA SOUND PANELS STUDIO DESIGN INC

Duarte, CA

LA Sound Panels Studio Design Inc — licensed ADU contractor in Duarte, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (424) 262 0622
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#10WATERWISE LANDSCAPE

Duarte, CA

Waterwise Landscape — licensed ADU contractor in Duarte, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (626) 358 3322
View All 44 Contractors →

💰 How Much Does an ADU Cost in Duarte?

Garage Conversion

$69,000 - $129,000

Converting existing garage to living space

Detached ADU

$148,000 - $323,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,117 - $5,117

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Duarte

How much does it cost to build an ADU in Duarte?▼
The average cost to build an ADU in Duarte ranges from $148,000 to $323,000, or approximately $198 to $373 per square foot. Garage conversions typically cost $69,000 to $129,000.
How long does it take to get an ADU permit in Duarte?▼
The ADU permit process in Duarte 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 Duarte?▼
In Duarte, 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 Duarte?▼
Duarte 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 Duarte?▼
No parking is required for ADUs in Duarte 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

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