Corte Madera, Marin County

ADU / Guest House Cost in Corte Madera, CA

Corte Madera remodeling costs are 20% abovethe California state average. Here's what a typical adu / guest house costs in Corte Madera in 2026, based on a 500 sqf project.

Budget
$150,000
$300/sqf
Mid-Range
$240,000
$480/sqf
High-End
$360,000
$720/sqf

Cost breakdown

Foundation & Framing
25%$60,000
Mechanical (HVAC, Plumbing, Electrical)
20%$48,000
Interior Finishes
20%$48,000
Exterior & Roofing
15%$36,000
Kitchen & Bath Fixtures
10%$24,000
Permits, Plans & Engineering
10%$24,000

Breakdown based on mid-range estimate of $240,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Corte Madera

Small Marin town with strong schools and family demand. Many 1960s-70s homes being updated. Christmas Tree Hill area has unique hillside construction challenges.

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 Corte Madera

Kitchen Remodel
$36,000 – $108,000
Bathroom Remodel
$18,000 – $57,600
Room Addition
$72,000 – $198,000
Roof Replacement
$15,000 – $45,000
Exterior Paint
$6,000 – $21,000
Whole House Remodel
$324,000 – $1,080,000

ADU / Guest House cost in other California cities

Anaheim
$131,250 – $315,000 | Orange County
Morgan Hill
$137,500 – $330,000 | Santa Clara County
Foster City
$156,250 – $375,000 | San Mateo County
South San Francisco
$150,000 – $360,000 | San Mateo County
Los Altos
$168,750 – $405,000 | Santa Clara County
Pittsburg
$118,750 – $285,000 | Contra Costa County
Los Altos Hills
$175,000 – $420,000 | Santa Clara County
Milpitas
$143,750 – $345,000 | Santa Clara County

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