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ADU Builders & Contractors in Mission Viejo, CA

Mission Viejo, CA is home to 298 ADU contractors ready to help. From initial permits to final inspection, these local professionals know Mission Viejo's building codes and can guide your project from concept to completion.

📊 ADU Quick Facts for Mission Viejo

Avg. Cost/sqft

$207-$382

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 298 ADU Contractors in Mission Viejo

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#1XINLONG CONSTRUCTION INC

Mission Viejo, CA

Xinlong Construction Inc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (310) 216 8523
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#2A T C CONSTRUCTION INC

Mission Viejo, CA

A T C Construction Inc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (949) 215 2987
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#3A - PLUS BUSINESSES INC

Mission Viejo, CA

A - Plus Businesses Inc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 9+ years experience.

View Profile📞 (714) 709 7730
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#4COAST AND COUNTRY CONSTRUCTION LLC

Mission Viejo, CA

Coast And Country Construction Llc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction.

View Profile📞 (949) 761 0451
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#5COMFORT HEATING AND AIR CONDITIONING

Mission Viejo, CA

Comfort Heating And Air Conditioning — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (714) 335 7055
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#6TILBEQ DEVELOPMENT INC

Mission Viejo, CA

Tilbeq Development Inc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction.

View Profile📞 (949) 413 3309
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#7AWERKAMP CONSTRUCTION

Mission Viejo, CA

Awerkamp Construction — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (714) 322 0952
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#8NEWCOMB BRIAN SERVICES

Mission Viejo, CA

Newcomb Brian Services — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (949) 433 3853
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#9DEL SOL CONSTRUCTION & ROOFING

Mission Viejo, CA

Del Sol Construction & Roofing — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 34+ years experience.

View Profile📞 (949) 454 1938
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#10ARM HOME DESIGN INC

Mission Viejo, CA

Arm Home Design Inc — licensed ADU contractor in Mission Viejo, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (949) 215 5554
View All 298 Contractors →

💰 How Much Does an ADU Cost in Mission Viejo?

Garage Conversion

$73,500 - $133,500

Converting existing garage to living space

Detached ADU

$157,000 - $332,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$1,105 - $5,105

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Mission Viejo

How much does it cost to build an ADU in Mission Viejo?▼
The average cost to build an ADU in Mission Viejo ranges from $157,000 to $332,000, or approximately $207 to $382 per square foot. Garage conversions typically cost $73,500 to $133,500.
How long does it take to get an ADU permit in Mission Viejo?▼
The ADU permit process in Mission 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 Mission Viejo?▼
In Mission 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 Mission Viejo?▼
Mission 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 Mission Viejo?▼
No parking is required for ADUs in Mission 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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