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ADU Builders & Contractors in Torrance, CA

Torrance offers South Bay beach proximity at lower costs than Manhattan or Hermosa Beach — averaging $275–$375 per square foot. Post-war homes on generous lots create ideal conditions for backyard ADU construction. California law ensures at least one ADU per lot with no added parking near transit. The aerospace and healthcare job market fuels rental demand. An ADU contractor in Torrance who knows South Bay standards delivers compliant results.

📊 ADU Quick Facts for Torrance

Avg. Cost/sqft

$325-$575

Permit Timeline

4-12 weeks

Max Size

1200 sqft

Setbacks

4ft sides

View Torrance Planning Department →

Top 442 ADU Contractors in Torrance

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#1SOUTHBAY DESIGN AND BUILD

Torrance, CA

Southbay Design And Build — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (310) 896 8431
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#2PLUMBING EXPRESS

Torrance, CA

Plumbing Express — licensed ADU contractor in Torrance, CA. Detached ADU construction. 33+ years experience.

View Profile📞 (310) 420 1919
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#3BANYAN GROUP CONSTRUCTION INC

Torrance, CA

Banyan Group Construction Inc — licensed ADU contractor in Torrance, CA. Detached ADU construction. 20+ years experience.

View Profile📞 (562) 900 0030
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#4STAFORELLI DESIGN & BUILDING INC

Torrance, CA

Staforelli Design & Building Inc — licensed ADU contractor in Torrance, CA. Detached ADU construction. 21+ years experience.

View Profile📞 (310) 634 4803
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#5E C DESIGNS

Torrance, CA

E C Designs — licensed ADU contractor in Torrance, CA. Detached ADU construction. 15+ years experience.

View Profile📞 (310) 292 6749
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#6BECERRIL ENTERPRISES

Torrance, CA

Becerril Enterprises — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (310) 279 7069
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#7HASSAN ALI

Torrance, CA

Hassan Ali — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (310) 803 6553
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#8ELITE UPGRADES LLC

Torrance, CA

Elite Upgrades Llc — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (310) 308 0671
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#9NNE CONSTRUCTION ENGINEERING

Torrance, CA

Nne Construction Engineering — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (714) 880 5927
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#10NAILED IT CONSTRUCTION GROUP

Torrance, CA

Nailed IT Construction Group — licensed ADU contractor in Torrance, CA. Detached ADU construction.

View Profile📞 (310) 782 4955
View All 442 Contractors →

💰 How Much Does an ADU Cost in Torrance?

Garage Conversion

$80,000 - $195,000

Converting existing garage to living space

Detached ADU

$160,000 - $400,000

New standalone unit (600-1,200 sqft)

Permit & Fees

$4,000 - $13,000

Plan check, permits, utility connections

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

❓ Frequently Asked Questions About ADUs in Torrance

How much does it cost to build an ADU in Torrance?▼
The average cost to build an ADU in Torrance ranges from $160,000 to $400,000, or approximately $325 to $575 per square foot. Garage conversions typically cost $80,000 to $195,000.
How long does it take to get an ADU permit in Torrance?▼
The ADU permit process in Torrance 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 Torrance?▼
In Torrance, 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 Torrance?▼
Torrance 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 Torrance?▼
No parking is required for ADUs in Torrance 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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