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ADU Builders & Contractors in Foothill Ranch, CA

With 28 verified ADU contractors serving Foothill Ranch, 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 Foothill Ranch

Avg. Cost/sqft

$200-$375

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 28 ADU Contractors in Foothill Ranch

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#1ALASHQAR SAMIR M

Foothill Ranch, CA

Alashqar Samir M — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (949) 292 7578
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#2B N D 2 CONSTRUCTION

Foothill Ranch, CA

B N D 2 Construction — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (949) 633 8709
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#3JENKINS JESS CONSTRUCTION

Foothill Ranch, CA

Jenkins Jess Construction — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 43+ years experience.

View Profile📞 (949) 829 8863
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#4JAMISON CONSTRUCTION

Foothill Ranch, CA

Jamison Construction — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction.

View Profile📞 (949) 463 8066
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#5CHERNENKO MAKSYM

Foothill Ranch, CA

Chernenko Maksym — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction.

View Profile📞 (669) 273 9400
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#6WEST COAST QUALITY CONSTRUCTION

Foothill Ranch, CA

West Coast Quality Construction — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (213) 273 4233
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#7SERPRO OF LAGUNA HILLS/LAGUNA NIGUEL/RANCHO SANTA MARGARITA/COTO

Foothill Ranch, CA

Serpro OF Laguna Hills/Laguna Niguel/Rancho Santa Margarita/Coto — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction.

View Profile📞 (949) 472 8090
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#8RIA GROUP

Foothill Ranch, CA

Ria Group — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction.

View Profile📞 (818) 633 2277
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#9CAL - PRO CONTRACTOR'S INC

Foothill Ranch, CA

Cal - Pro Contractor'S Inc — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (714) 602 4900
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#10BLUE RIBBON DESIGN BUILD

Foothill Ranch, CA

Blue Ribbon Design Build — licensed ADU contractor in Foothill Ranch, CA. Detached ADU construction. 53+ years experience.

View Profile📞 (949) 586 6673
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💰 How Much Does an ADU Cost in Foothill Ranch?

Garage Conversion

$70,000 - $130,000

Converting existing garage to living space

Detached ADU

$150,000 - $325,000

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 Foothill Ranch contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Foothill Ranch

How much does it cost to build an ADU in Foothill Ranch?▼
The average cost to build an ADU in Foothill Ranch ranges from $150,000 to $325,000, or approximately $200 to $375 per square foot. Garage conversions typically cost $70,000 to $130,000.
How long does it take to get an ADU permit in Foothill Ranch?▼
The ADU permit process in Foothill Ranch 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 Foothill Ranch?▼
In Foothill Ranch, 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 Foothill Ranch?▼
Foothill Ranch 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 Foothill Ranch?▼
No parking is required for ADUs in Foothill Ranch 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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