Tiburon, Marin County

ADU / Guest House Cost in Tiburon, CA

Tiburon remodeling costs are 35% abovethe California state average. Here's what a typical adu / guest house costs in Tiburon in 2026, based on a 500 sqf project.

Budget
$168,750
$338/sqf
Mid-Range
$270,000
$540/sqf
High-End
$405,000
$810/sqf

Cost breakdown

Foundation & Framing
25%$67,500
Mechanical (HVAC, Plumbing, Electrical)
20%$54,000
Interior Finishes
20%$54,000
Exterior & Roofing
15%$40,500
Kitchen & Bath Fixtures
10%$27,000
Permits, Plans & Engineering
10%$27,000

Breakdown based on mid-range estimate of $270,000

Typical Timeline
4-8 months
Permits Required

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

Remodeling in Tiburon

Waterfront peninsula with some of Marin's highest home values. Views drive major renovation investments. Steep terrain adds complexity and cost to all projects. Premium contractor rates are standard.

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.

Have estimates for your Tiburon project?

Upload them and get an AI-powered comparison with CSLB license verification. Free.

Compare Estimates →

Other projects in Tiburon

Kitchen Remodel
$40,500 – $121,500
Bathroom Remodel
$20,250 – $64,800
Room Addition
$81,000 – $222,750
Roof Replacement
$16,875 – $50,625
Exterior Paint
$6,750 – $23,625
Whole House Remodel
$364,500 – $1,215,000

ADU / Guest House cost in other California cities

Burbank
$125,000 – $300,000 | Los Angeles County
Palm Desert
$118,750 – $285,000 | Riverside County
Palm Springs
$118,750 – $285,000 | Riverside County
San Marcos
$118,750 – $285,000 | San Diego County
Poway
$125,000 – $300,000 | San Diego County
Thousand Oaks
$131,250 – $315,000 | Ventura County
Redondo Beach
$137,500 – $330,000 | Los Angeles County
Pomona
$112,500 – $270,000 | Los Angeles County

Get a personalized estimate

Use our interactive cost estimator to adjust square footage and see detailed pricing for your specific project.

Open Cost Estimator →