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ADU Builders & Contractors in Aliso Viejo, CA

With 118 verified ADU contractors serving Aliso Viejo, 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 Aliso Viejo

Avg. Cost/sqft

$195-$370

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 118 ADU Contractors in Aliso Viejo

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#1BUCKSWORTH CONSTRUCTION SERVICES

Aliso Viejo, CA

Bucksworth Construction Services — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (949) 981 5116
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#2M A BUILDING CONTRACTOR

Aliso Viejo, CA

M A Building Contractor — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (949) 540 4848
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#3BUSH TROY CONSTRUCTION

Aliso Viejo, CA

Bush Troy Construction — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (949) 910 9909
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#4COASTLINE CONSTRUCTION

Aliso Viejo, CA

Coastline Construction — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (714) 470 7072
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#5ROYALTY COMPANY THE

Aliso Viejo, CA

Royalty Company The — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (949) 621 6000
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#6ROSAS STEVEN CHARLES

Aliso Viejo, CA

Rosas Steven Charles — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (714) 725 1111
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#7WEST COAST REMODELING EXPERTS INC

Aliso Viejo, CA

West Coast Remodeling Experts Inc — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 16+ years experience.

View Profile📞 (714) 293 0393
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#8CHRISTAKES MATTHEW CONSTRUCTION

Aliso Viejo, CA

Christakes Matthew Construction — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (949) 254 1798
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#9JM CONSTRUCTION COMPANY

Aliso Viejo, CA

JM Construction Company — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (714) 215 7500
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#10TITAN BUILDER

Aliso Viejo, CA

Titan Builder — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (949) 656 6502
View All 118 Contractors →

💰 How Much Does an ADU Cost in Aliso Viejo?

Garage Conversion

$67,500 - $127,500

Converting existing garage to living space

Detached ADU

$145,000 - $320,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,108 - $5,108

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Aliso Viejo

How much does it cost to build an ADU in Aliso Viejo?▼
The average cost to build an ADU in Aliso Viejo ranges from $145,000 to $320,000, or approximately $195 to $370 per square foot. Garage conversions typically cost $67,500 to $127,500.
How long does it take to get an ADU permit in Aliso Viejo?▼
The ADU permit process in Aliso Viejo 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 Aliso Viejo?▼
In Aliso Viejo, 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 Aliso Viejo?▼
Aliso Viejo 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 Aliso Viejo?▼
No parking is required for ADUs in Aliso Viejo 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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