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ADU Builders & Contractors in Irwindale, CA

Irwindale, CA is home to 17 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Irwindale's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Irwindale

Avg. Cost/sqft

$203-$378

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 17 ADU Contractors in Irwindale

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#1CALIFORNIA MAINTENANCE & ENVIRONMENTAL

Irwindale, CA

California Maintenance & Environmental — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (909) 445 9707
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#2GAMMILL ELECTRIC INC

Irwindale, CA

Gammill Electric Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 58+ years experience.

View Profile📞 (626) 812 4515
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#3PNG BUILDERS

Irwindale, CA

Png Builders — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 66+ years experience.

View Profile📞 (626) 357 4400
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#4BEST RIDGE LINE INC

Irwindale, CA

Best Ridge Line Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction.

View Profile📞 (626) 242 5692
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#5INNER GLOBAL INC

Irwindale, CA

Inner Global Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (626) 416 0958
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#6INDUSTRY DRYWALL & METAL STUD FRAMING

Irwindale, CA

Industry Drywall & Metal Stud Framing — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (323) 708 0772
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#7A CUT ABOVE BUILDING & DEVELOPING INC

Irwindale, CA

A Cut Above Building & Developing Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (626) 665 3016
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#8IRWINDALE WINDOWS CO

Irwindale, CA

Irwindale Windows CO — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (626) 814 3302
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#9AMERICAN GRANDSTAND SEATING CO INC

Irwindale, CA

American Grandstand Seating CO Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 53+ years experience.

View Profile📞 (626) 303 5112
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#10LOS ANGELES PLUMBING & BACKFLOW TESTING INC

Irwindale, CA

Los Angeles Plumbing & Backflow Testing Inc — licensed ADU contractor in Irwindale, CA. Detached ADU construction. 37+ years experience.

View Profile📞 (626) 814 0818
View All 17 Contractors →

💰 How Much Does an ADU Cost in Irwindale?

Garage Conversion

$71,500 - $131,500

Converting existing garage to living space

Detached ADU

$153,000 - $328,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,114 - $5,114

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Irwindale

How much does it cost to build an ADU in Irwindale?▼
The average cost to build an ADU in Irwindale ranges from $153,000 to $328,000, or approximately $203 to $378 per square foot. Garage conversions typically cost $71,500 to $131,500.
How long does it take to get an ADU permit in Irwindale?▼
The ADU permit process in Irwindale 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 Irwindale?▼
In Irwindale, 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 Irwindale?▼
Irwindale 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 Irwindale?▼
No parking is required for ADUs in Irwindale 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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