Daly City, San Mateo County

Room Addition Cost in Daly City, CA

Daly City remodeling costs are 20% abovethe California state average. Here's what a typical room addition costs in Daly City in 2026, based on a 300 sqf project.

Budget
$72,000
$240/sqf
Mid-Range
$126,000
$420/sqf
High-End
$198,000
$660/sqf

Cost breakdown

Foundation & Framing
30%$37,800
Roofing & Exterior
15%$18,900
Mechanical (HVAC, Electrical)
15%$18,900
Interior Finishes
20%$25,200
Windows & Doors
10%$12,600
Permits & Engineering
10%$12,600

Breakdown based on mid-range estimate of $126,000

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Daly City

Just south of SF with slightly lower costs. Dense, hillside neighborhoods with many 1950s-60s homes due for updates. Fog and moisture make exterior material choices critical.

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 Daly City

Kitchen Remodel
$36,000 – $108,000
Bathroom Remodel
$18,000 – $57,600
ADU / Guest House
$150,000 – $360,000
Roof Replacement
$15,000 – $45,000
Exterior Paint
$6,000 – $21,000
Whole House Remodel
$324,000 – $1,080,000

Room Addition cost in other California cities

San Jose
$75,000 – $206,250 | Santa Clara County
Half Moon Bay
$72,000 – $198,000 | San Mateo County
Palo Alto
$81,000 – $222,750 | Santa Clara County
Temecula
$54,000 – $148,500 | Riverside County
Milpitas
$69,000 – $189,750 | Santa Clara County
Whittier
$57,000 – $156,750 | Los Angeles County
Torrance
$60,000 – $165,000 | Los Angeles County
Campbell
$72,000 – $198,000 | Santa Clara County

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