Folsom, Sacramento County

Room Addition Cost in Folsom, CA

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

Affluent Sacramento suburb with newer homes. Folsom Lake proximity drives outdoor living and pool renovation demand. Higher-end finishes are standard in this market.

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 Folsom

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

Pleasanton
$69,000 – $189,750 | Alameda County
Pasadena
$66,000 – $181,500 | Los Angeles County
Walnut Creek
$69,000 – $189,750 | Contra Costa County
Napa
$69,000 – $189,750 | Napa County
Carlsbad
$66,000 – $181,500 | San Diego County
Visalia
$45,000 – $123,750 | Tulare County
Union City
$66,000 – $181,500 | Alameda County
Newark
$66,000 – $181,500 | Alameda County

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