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ADU Builders & Contractors in Norco, CA

With 161 verified ADU contractors serving Norco, 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 Norco

Avg. Cost/sqft

$208-$383

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 161 ADU Contractors in Norco

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#1GDT FRAMING INC

Norco, CA

Gdt Framing Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 27+ years experience.

View Profile📞 (951) 273 7000
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#2PETCH & CHAI SERVICE AND MAINTENANCE

Norco, CA

Petch & Chai Service And Maintenance — licensed ADU contractor in Norco, CA. Detached ADU construction. 36+ years experience.

View Profile📞 (951) 734 4550
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#3NETTEKOVEN JETT

Norco, CA

Nettekoven Jett — licensed ADU contractor in Norco, CA. Detached ADU construction. 24+ years experience.

View Profile📞 (951) 454 6165
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#4ROYAL WEST DRYWALL INC

Norco, CA

Royal West Drywall Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (951) 271 4600
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#5DAVIS ROBERT

Norco, CA

Davis Robert — licensed ADU contractor in Norco, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (909) 227 7661
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#6VOLT TECH ELECTRIC

Norco, CA

Volt Tech Electric — licensed ADU contractor in Norco, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (951) 515 4852
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#7COMMERCIAL FENCE CO INC

Norco, CA

Commercial Fence CO Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (951) 427 5575
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#8ORANGE PACIFIC BUILDER

Norco, CA

Orange Pacific Builder — licensed ADU contractor in Norco, CA. Detached ADU construction.

View Profile📞 (949) 304 4389
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#9YOCOM GUY CONSTRUCTION INC

Norco, CA

Yocom Guy Construction Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (951) 284 3456
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#10CONTERRA CONSTRUCTION

Norco, CA

Conterra Construction — licensed ADU contractor in Norco, CA. Detached ADU construction. 16+ years experience.

View Profile📞 (909) 374 5920
View All 161 Contractors →

💰 How Much Does an ADU Cost in Norco?

Garage Conversion

$74,000 - $134,000

Converting existing garage to living space

Detached ADU

$158,000 - $333,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,111 - $5,111

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Norco

How much does it cost to build an ADU in Norco?▼
The average cost to build an ADU in Norco ranges from $158,000 to $333,000, or approximately $208 to $383 per square foot. Garage conversions typically cost $74,000 to $134,000.
How long does it take to get an ADU permit in Norco?▼
The ADU permit process in Norco 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 Norco?▼
In Norco, 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 Norco?▼
Norco 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 Norco?▼
No parking is required for ADUs in Norco 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.

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