Vacaville, Solano County

Room Addition Cost in Vacaville, CA

Vacaville remodeling costs are 10% belowthe California state average. Here's what a typical room addition costs in Vacaville in 2026, based on a 300 sqf project.

Budget
$54,000
$180/sqf
Mid-Range
$94,500
$315/sqf
High-End
$148,500
$495/sqf

Cost breakdown

Foundation & Framing
30%$28,350
Roofing & Exterior
15%$14,175
Mechanical (HVAC, Electrical)
15%$14,175
Interior Finishes
20%$18,900
Windows & Doors
10%$9,450
Permits & Engineering
10%$9,450

Breakdown based on mid-range estimate of $94,500

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Vacaville

Gateway between the Bay Area and Sacramento. Affordable housing with strong remodeling value. Hot summers make energy efficiency, insulation, and HVAC critical components.

A room addition adds square footage and value to your home. Costs depend on whether it's a simple bump-out, a second story, or a full wing addition with plumbing.

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Other projects in Vacaville

Kitchen Remodel
$27,000 – $81,000
Bathroom Remodel
$13,500 – $43,200
ADU / Guest House
$112,500 – $270,000
Roof Replacement
$11,250 – $33,750
Exterior Paint
$4,500 – $15,750
Whole House Remodel
$243,000 – $810,000

Room Addition cost in other California cities

Danville
$72,000 – $198,000 | Contra Costa County
El Monte
$54,000 – $148,500 | Los Angeles County
Los Altos Hills
$84,000 – $231,000 | Santa Clara County
Menlo Park
$81,000 – $222,750 | San Mateo County
Foster City
$75,000 – $206,250 | San Mateo County
Berkeley
$75,000 – $206,250 | Alameda County
Gilroy
$63,000 – $173,250 | Santa Clara County
Antioch
$57,000 – $156,750 | Contra Costa County

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