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ADU Builders & Contractors in Rancho Mission Viejo, CA

Building an ADU in Rancho Mission Viejo? You'll find 16 licensed contractors in the area, ready to help. Rancho Mission Viejo's ADU market continues to grow as homeowners invest in additional living space, rental income, and multi-generational housing.

📊 ADU Quick Facts for Rancho Mission Viejo

Avg. Cost/sqft

$192-$367

Permit Timeline

60-120 weeks

Max Size

1200 sqft

Setbacks

4ft sides

Top 16 ADU Contractors in Rancho Mission Viejo

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#1MATYSZUK BENJAMIN R

Rancho Mission Viejo, CA

Matyszuk Benjamin R — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 7+ years experience.

View Profile📞 (949) 689 9893
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#2SWARTZ R L CO

Rancho Mission Viejo, CA

Swartz R L CO — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 48+ years experience.

View Profile📞 (714) 315 5515
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#3FALCON CONSTRUCTION

Rancho Mission Viejo, CA

Falcon Construction — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 14+ years experience.

View Profile📞 (949) 763 1179
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#4MILO CONSTRUCTION INC

Rancho Mission Viejo, CA

Milo Construction Inc — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (949) 981 2548
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#5HARTUNG CONSTRUCTION INC

Rancho Mission Viejo, CA

Hartung Construction Inc — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 29+ years experience.

View Profile📞 (949) 366 2404
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#6MESSINEO GERALD

Rancho Mission Viejo, CA

Messineo Gerald — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 31+ years experience.

View Profile📞 (714) 675 4579
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#7E W POTTS CONSTRUCTION SERVICES

Rancho Mission Viejo, CA

E W Potts Construction Services — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 17+ years experience.

View Profile📞 (949) 220 3301
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#8F A BUILDERS

Rancho Mission Viejo, CA

F A Builders — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 32+ years experience.

View Profile📞 (949) 289 3017
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#9REVETTA MARC CONSTRUCTION INC

Rancho Mission Viejo, CA

Revetta Marc Construction Inc — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction. 18+ years experience.

View Profile📞 (949) 933 8258
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#10LOMBARDI BUILDER

Rancho Mission Viejo, CA

Lombardi Builder — licensed ADU contractor in Rancho Mission Viejo, CA. Detached ADU construction.

View Profile📞 (818) 643 0053
View All 16 Contractors →

💰 How Much Does an ADU Cost in Rancho Mission Viejo?

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 Mission Viejo contractors to compare pricing.

❓ Frequently Asked Questions About ADUs in Rancho Mission Viejo

How much does it cost to build an ADU in Rancho Mission Viejo?▼
The average cost to build an ADU in Rancho Mission Viejo 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 Mission Viejo?▼
The ADU permit process in Rancho 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 Rancho Mission Viejo?▼
In Rancho 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 Rancho Mission Viejo?▼
Rancho 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 Rancho Mission Viejo?▼
No parking is required for ADUs in Rancho 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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