Vallejo, Solano County

Room Addition Cost in Vallejo, CA

Vallejo remodeling costs are nearthe California state average. Here's what a typical room addition costs in Vallejo in 2026, based on a 300 sqf project.

Budget
$57,000
$190/sqf
Mid-Range
$99,750
$333/sqf
High-End
$156,750
$523/sqf

Cost breakdown

Foundation & Framing
30%$29,925
Roofing & Exterior
15%$14,963
Mechanical (HVAC, Electrical)
15%$14,963
Interior Finishes
20%$19,950
Windows & Doors
10%$9,975
Permits & Engineering
10%$9,975

Breakdown based on mid-range estimate of $99,750

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Vallejo

Most affordable waterfront city in the Bay Area. Significant renovation potential as the city continues its comeback. Ferry access to SF makes it attractive for commuters investing in home improvements.

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 Vallejo

Kitchen Remodel
$28,500 – $85,500
Bathroom Remodel
$14,250 – $45,600
ADU / Guest House
$118,750 – $285,000
Roof Replacement
$11,875 – $35,625
Exterior Paint
$4,750 – $16,625
Whole House Remodel
$256,500 – $855,000

Room Addition cost in other California cities

Glendale
$63,000 – $173,250 | Los Angeles County
Castro Valley
$66,000 – $181,500 | Alameda County
Los Altos Hills
$84,000 – $231,000 | Santa Clara County
Pomona
$54,000 – $148,500 | Los Angeles County
Los Angeles
$63,000 – $173,250 | Los Angeles County
Simi Valley
$57,000 – $156,750 | Ventura County
Lake Forest
$63,000 – $173,250 | Orange County
Folsom
$57,000 – $156,750 | Sacramento County

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