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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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#1MALDO CONSTRUCTION SERVICES

Norco, CA

Maldo Construction Services — licensed ADU contractor in Norco, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (714) 273 9106
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#2CONSTRUCTIVE IMPROVEMENTS

Norco, CA

Constructive Improvements — licensed ADU contractor in Norco, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (714) 501 0272
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#3ABOVE ALL CONSTRUCTION

Norco, CA

Above All Construction — licensed ADU contractor in Norco, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (951) 543 2924
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#4ABLE SPRINKLER CORPORATION

Norco, CA

Able Sprinkler Corporation — licensed ADU contractor in Norco, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (951) 371 0324
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#5BOWERS CONSTRUCTION

Norco, CA

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

View Profile📞 (714) 883 5172
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#6ALLEN DAVID G

Norco, CA

Allen David G — licensed ADU contractor in Norco, CA. Detached ADU construction. 23+ years experience.

View Profile📞 (909) 319 3071
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#7ADAM KUNKA CONSTRUCTION

Norco, CA

Adam Kunka Construction — licensed ADU contractor in Norco, CA. Detached ADU construction.

View Profile📞 (626) 806 5422
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#8UNITED BROS KITCHENS INC

Norco, CA

United Bros Kitchens Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 10+ years experience.

View Profile📞 (949) 945 7075
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#9ACUNA S CONSTRUCTION

Norco, CA

Acuna S Construction — licensed ADU contractor in Norco, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (626) 222 6792
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#10EMBASSY CONSTRUCTION INC

Norco, CA

Embassy Construction Inc — licensed ADU contractor in Norco, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (951) 833 6171
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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