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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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#1BAP POWER LLC

Aliso Viejo, CA

Bap Power Llc — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (760) 603 1933
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#2CLEAR VIEW FOLDING DOORS INC

Aliso Viejo, CA

Clear View Folding Doors Inc — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (949) 317 6836
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#3SPECIALIZED RESIDENTIAL & COMMERCIAL IMPROVEMENTS

Aliso Viejo, CA

Specialized Residential & Commercial Improvements — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction.

View Profile📞 (949) 354 7162
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#4SOUTHCOAST CONSTRUCTION

Aliso Viejo, CA

Southcoast Construction — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (714) 504 9795
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#5ALL CONSTRUCTION JOB INC

Aliso Viejo, CA

All Construction Job Inc — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (949) 590 0027
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#6LINARES CONSTRUCTION CO

Aliso Viejo, CA

Linares Construction CO — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 39+ years experience.

View Profile📞 (949) 355 1800
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#7SHUR - DRY

Aliso Viejo, CA

Shur - Dry — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (714) 434 6584
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#8CUTTING EDGE MILLWORKS

Aliso Viejo, CA

Cutting Edge Millworks — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (949) 910 0590
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#9D L RESTCON

Aliso Viejo, CA

D L Restcon — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 12+ years experience.

View Profile📞 (949) 300 7948
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#10HOMEPRO REMODELING INC

Aliso Viejo, CA

Homepro Remodeling Inc — licensed ADU contractor in Aliso Viejo, CA. Detached ADU construction. 19+ years experience.

View Profile📞 (877) 878 5668
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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