Benicia, Solano County

Room Addition Cost in Benicia, CA

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

Budget
$60,000
$200/sqf
Mid-Range
$105,000
$350/sqf
High-End
$165,000
$550/sqf

Cost breakdown

Foundation & Framing
30%$31,500
Roofing & Exterior
15%$15,750
Mechanical (HVAC, Electrical)
15%$15,750
Interior Finishes
20%$21,000
Windows & Doors
10%$10,500
Permits & Engineering
10%$10,500

Breakdown based on mid-range estimate of $105,000

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Benicia

Charming waterfront city with historic downtown. Mix of Victorian and mid-century homes. More affordable than Marin but with similar small-town character. Straightforward permitting.

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.

Have estimates for your Benicia project?

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

Compare Estimates →

Other projects in Benicia

Kitchen Remodel
$30,000 – $90,000
Bathroom Remodel
$15,000 – $48,000
ADU / Guest House
$125,000 – $300,000
Roof Replacement
$12,500 – $37,500
Exterior Paint
$5,000 – $17,500
Whole House Remodel
$270,000 – $900,000

Room Addition cost in other California cities

San Rafael
$72,000 – $198,000 | Marin County
Los Altos
$81,000 – $222,750 | Santa Clara County
Carlsbad
$66,000 – $181,500 | San Diego County
Ventura
$60,000 – $165,000 | Ventura County
Riverside
$51,000 – $140,250 | Riverside County
Palm Springs
$57,000 – $156,750 | Riverside County
Menlo Park
$81,000 – $222,750 | San Mateo County
Sausalito
$78,000 – $214,500 | Marin 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 →