Torrance, Los Angeles County

ADU / Guest House Cost in Torrance, CA

Torrance remodeling costs are nearthe California state average. Here's what a typical adu / guest house costs in Torrance in 2026, based on a 500 sqf project.

Budget
$125,000
$250/sqf
Mid-Range
$200,000
$400/sqf
High-End
$300,000
$600/sqf

Cost breakdown

Foundation & Framing
25%$50,000
Mechanical (HVAC, Plumbing, Electrical)
20%$40,000
Interior Finishes
20%$40,000
Exterior & Roofing
15%$30,000
Kitchen & Bath Fixtures
10%$20,000
Permits, Plans & Engineering
10%$20,000

Breakdown based on mid-range estimate of $200,000

Typical Timeline
4-8 months
Permits Required

Building, electrical, plumbing, mechanical. May require plan check.

Remodeling in Torrance

South Bay location with a strong mix of contractors serving the area. Post-war homes dominate, and kitchen/bathroom remodels are the most common projects.

California allows ADUs on most residential lots since 2020. An ADU adds living space and rental income. Cities must approve or deny within 60 days of a complete application.

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Other projects in Torrance

Kitchen Remodel
$30,000 – $90,000
Bathroom Remodel
$15,000 – $48,000
Room Addition
$60,000 – $165,000
Roof Replacement
$12,500 – $37,500
Exterior Paint
$5,000 – $17,500
Whole House Remodel
$270,000 – $900,000

ADU / Guest House cost in other California cities

Vacaville
$112,500 – $270,000 | Solano County
Woodside
$168,750 – $405,000 | San Mateo County
Carlsbad
$137,500 – $330,000 | San Diego County
Fairfax
$143,750 – $345,000 | Marin County
Sonoma
$143,750 – $345,000 | Sonoma County
San Marcos
$118,750 – $285,000 | San Diego County
Menlo Park
$168,750 – $405,000 | San Mateo County
Rancho Cucamonga
$112,500 – $270,000 | San Bernardino County

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