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ADU Builders & Contractors in San Diego, CA

San Diego homeowners invest $300,000–$450,000 for a detached ADU build at $375–$600+ per square foot. The city leads California in ADU permitting, issuing thousands of permits yearly. Impact fees are waived for units under 750 sq ft, saving $15,000–$25,000. The coastal climate means fewer weather delays, and an experienced ADU contractor in San Diego can navigate the city's lot coverage and setback rules for an efficient, code-compliant build.

📊 ADU Quick Facts for San Diego

Avg. Cost/sqft

$300-$550

Permit Timeline

4-12 weeks

Max Size

1200 sqft

Setbacks

4ft sides

View San Diego Planning Department →

Top 2582 ADU Contractors in San Diego

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#1LEAD RESTORATION INC

San Diego, CA

Lead Restoration Inc — licensed ADU contractor in San Diego, CA. Detached ADU construction.

View Profile📞 (619) 261 1228
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#2QUANTUM BUILDERS INC

San Diego, CA

Quantum Builders Inc — licensed ADU contractor in San Diego, CA. Detached ADU construction.

View Profile📞 (714) 408 1319
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#3OJAY PAGANO GENERAL CONTRACTOR

San Diego, CA

Ojay Pagano General Contractor — licensed ADU contractor in San Diego, CA. Detached ADU construction. 11+ years experience.

View Profile📞 (619) 840 6062
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#4CREST VIEW CONSTRUCTION

San Diego, CA

Crest View Construction — licensed ADU contractor in San Diego, CA. Detached ADU construction.

View Profile📞 (858) 888 1235
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#5A PRO HANDYMAN

San Diego, CA

A Pro Handyman — licensed ADU contractor in San Diego, CA. Detached ADU construction. 23+ years experience.

View Profile📞 (619) 988 6256
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#6URBAN METERS & READERS

San Diego, CA

Urban Meters & Readers — licensed ADU contractor in San Diego, CA. Detached ADU construction. 19+ years experience.

View Profile📞 (619) 572 5689
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#7COMPLETE COMMERCIAL MAINTENANCE INC

San Diego, CA

Complete Commercial Maintenance Inc — licensed ADU contractor in San Diego, CA. Detached ADU construction. 13+ years experience.

View Profile📞 (858) 836 2232
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#8CITRINE BUILD GROUP

San Diego, CA

Citrine Build Group — licensed ADU contractor in San Diego, CA. Detached ADU construction.

View Profile📞 (619) 564 1099
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#9ONE HAT CONSTRUCTION INC

San Diego, CA

One Hat Construction Inc — licensed ADU contractor in San Diego, CA. Detached ADU construction. 6+ years experience.

View Profile📞 (888) 557 7997
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#10US HOME CONSTRUCTION LLC

San Diego, CA

US Home Construction Llc — licensed ADU contractor in San Diego, CA. Detached ADU construction.

View Profile📞 (619) 800 1151
View All 2582 Contractors →

💰 How Much Does an ADU Cost in San Diego?

Garage Conversion

$75,000 - $180,000

Converting existing garage to living space

Detached ADU

$150,000 - $380,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$6,500 - $21,000

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in San Diego

How much does it cost to build an ADU in San Diego?▼
The average cost to build an ADU in San Diego ranges from $150,000 to $380,000, or approximately $300 to $550 per square foot. Garage conversions typically cost $75,000 to $180,000.
How long does it take to get an ADU permit in San Diego?▼
The ADU permit process in San Diego typically takes 4 to 12 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 San Diego?▼
In San Diego, 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 San Diego?▼
San Diego 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 San Diego?▼
No parking is required for ADUs in San Diego 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 Francisco (2170)Sacramento (1551)Riverside (925)Fresno (904)Anaheim (784)Irvine (760)Huntington Beach (667)

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