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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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#1KINGS QUALITY CONSTRUCTION

Rancho Cucamonga, CA

Kings Quality Construction — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (323) 395 7259
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#2MINGXIAO WANG

Rancho Cucamonga, CA

Mingxiao Wang — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 892 8620
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#3MONTANO CONSTRUCTION CORP

Rancho Cucamonga, CA

Montano Construction Corp — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 268 8912
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#4PREMIER A D U

Rancho Cucamonga, CA

Premier A D U — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (949) 241 2475
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#5MILLIKEN HOUSING

Rancho Cucamonga, CA

Milliken Housing — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 805 9053
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#6RIVERCREST CONSTRUCTION CO

Rancho Cucamonga, CA

Rivercrest Construction CO — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 271 4069
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#7A&Z LEGACY BUILDERS INC

Rancho Cucamonga, CA

A&Z Legacy Builders Inc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 720 8283
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#8LOPEZ MONICA ORNELA

Rancho Cucamonga, CA

Lopez Monica Ornela — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 587 8963
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#9LYYCUS CONSTRUCTION SERVICES LLC

Rancho Cucamonga, CA

Lyycus Construction Services Llc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 552 1120
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#10CALIFORNIA WATER AND MOLD RESTORATION LLC

Rancho Cucamonga, CA

California Water And Mold Restoration Llc — licensed ADU contractor in Rancho Cucamonga, CA. Detached ADU construction.

View Profile📞 (909) 270 2203
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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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