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ADU Builders & Contractors in Rancho Cucamonga, CA

With 355 verified ADU contractors serving Rancho Cucamonga, 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 Rancho Cucamonga

Avg. Cost/sqft

$192-$367

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 355 ADU Contractors in Rancho Cucamonga

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#1MONTGOMERY HARDWARE CO

Rancho Cucamonga, CA

Montgomery Hardware CO — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 52+ years experience.

View Profile📞 (909) 204 4000
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#2CAREY WESLEY

Rancho Cucamonga, CA

Carey Wesley — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (909) 786 7675
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#3JDC ENERGY

Rancho Cucamonga, CA

Jdc Energy — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 8+ years experience.

View Profile📞 (909) 297 3626
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#4D ROD CONSTRUCTION INC

Rancho Cucamonga, CA

D Rod Construction Inc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (310) 256 5458
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#5DIVINE REMODELS AND MORE

Rancho Cucamonga, CA

Divine Remodels And More — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 19+ years experience.

View Profile📞 (909) 532 0703
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#6JAM WORKS INC

Rancho Cucamonga, CA

Jam Works Inc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (909) 322 6123
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#7W G C

Rancho Cucamonga, CA

W G C — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 32+ years experience.

View Profile📞 (909) 262 1522
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#8BRADY COMMERCIAL CONSTRUCTION SERVICES INC

Rancho Cucamonga, CA

Brady Commercial Construction Services Inc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 30+ years experience.

View Profile📞 (909) 599 3405
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#9S L R CONSTRUCTION

Rancho Cucamonga, CA

S L R Construction — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (909) 499 8297
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#10BCB CONSTRUCTION INC

Rancho Cucamonga, CA

Bcb Construction Inc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 910 8306
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💰 How Much Does an ADU Cost in Rancho Cucamonga?

Garage Conversion

$66,000 - $126,000

Converting existing garage to living space

Detached ADU

$142,000 - $317,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,097 - $5,097

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Rancho Cucamonga

How much does it cost to build an ADU in Rancho Cucamonga?▼
The average cost to build an ADU in Rancho Cucamonga ranges from $142,000 to $317,000, or approximately $192 to $367 per square foot. Garage conversions typically cost $66,000 to $126,000.
How long does it take to get an ADU permit in Rancho Cucamonga?▼
The ADU permit process in Rancho Cucamonga 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 Rancho Cucamonga?▼
In Rancho Cucamonga, 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 Rancho Cucamonga?▼
Rancho Cucamonga 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 Rancho Cucamonga?▼
No parking is required for ADUs in Rancho Cucamonga 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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