Concord, Contra Costa County

Room Addition Cost in Concord, CA

Concord remodeling costs are nearthe California state average. Here's what a typical room addition costs in Concord 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 Concord

Largest city in Contra Costa County with affordable remodeling costs for the Bay Area. Many 1960s-70s homes due for updates. The former Naval Weapons Station redevelopment is boosting the area.

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 Concord project?

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

Compare Estimates →

Other projects in Concord

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

Carlsbad
$66,000 – $181,500 | San Diego County
San Anselmo
$72,000 – $198,000 | Marin County
Visalia
$45,000 – $123,750 | Tulare County
Ontario
$51,000 – $140,250 | San Bernardino County
Palm Desert
$57,000 – $156,750 | Riverside County
San Bruno
$72,000 – $198,000 | San Mateo County
Murrieta
$54,000 – $148,500 | Riverside County
Corona
$54,000 – $148,500 | Riverside 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 →