San Clemente, Orange County

Room Addition Cost in San Clemente, CA

San Clemente remodeling costs are 10% abovethe California state average. Here's what a typical room addition costs in San Clemente in 2026, based on a 300 sqf project.

Budget
$66,000
$220/sqf
Mid-Range
$115,500
$385/sqf
High-End
$181,500
$605/sqf

Cost breakdown

Foundation & Framing
30%$34,650
Roofing & Exterior
15%$17,325
Mechanical (HVAC, Electrical)
15%$17,325
Interior Finishes
20%$23,100
Windows & Doors
10%$11,550
Permits & Engineering
10%$11,550

Breakdown based on mid-range estimate of $115,500

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in San Clemente

Southern OC coastal city with Spanish Colonial architecture. Design guidelines maintain the city's character. Coastal exposure requires marine-grade materials for exteriors.

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 San Clemente

Kitchen Remodel
$33,000 – $99,000
Bathroom Remodel
$16,500 – $52,800
ADU / Guest House
$137,500 – $330,000
Roof Replacement
$13,750 – $41,250
Exterior Paint
$5,500 – $19,250
Whole House Remodel
$297,000 – $990,000

Room Addition cost in other California cities

Novato
$69,000 – $189,750 | Marin County
Walnut Creek
$69,000 – $189,750 | Contra Costa County
Vallejo
$57,000 – $156,750 | Solano County
Hayward
$63,000 – $173,250 | Alameda County
Benicia
$60,000 – $165,000 | Solano County
Union City
$66,000 – $181,500 | Alameda County
San Anselmo
$72,000 – $198,000 | Marin County
Fresno
$48,000 – $132,000 | Fresno County

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