Corona, Riverside County

Room Addition Cost in Corona, CA

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

Budget
$54,000
$180/sqf
Mid-Range
$94,500
$315/sqf
High-End
$148,500
$495/sqf

Cost breakdown

Foundation & Framing
30%$28,350
Roofing & Exterior
15%$14,175
Mechanical (HVAC, Electrical)
15%$14,175
Interior Finishes
20%$18,900
Windows & Doors
10%$9,450
Permits & Engineering
10%$9,450

Breakdown based on mid-range estimate of $94,500

Typical Timeline
3-6 months
Permits Required

Building permit, structural engineering, possibly zoning approval.

Remodeling in Corona

Suburban community with mostly 1990s-2010s homes. Remodels tend to be kitchen and bathroom upgrades. Costs are moderate for Southern California.

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 Corona

Kitchen Remodel
$27,000 – $81,000
Bathroom Remodel
$13,500 – $43,200
ADU / Guest House
$112,500 – $270,000
Roof Replacement
$11,250 – $33,750
Exterior Paint
$4,500 – $15,750
Whole House Remodel
$243,000 – $810,000

Room Addition cost in other California cities

Foster City
$75,000 – $206,250 | San Mateo County
Lake Forest
$63,000 – $173,250 | Orange County
Newark
$66,000 – $181,500 | Alameda County
Monterey
$66,000 – $181,500 | Monterey County
Livermore
$63,000 – $173,250 | Alameda County
Fresno
$48,000 – $132,000 | Fresno County
San Francisco
$81,000 – $222,750 | San Francisco County
Del Mar
$72,000 – $198,000 | San Diego County

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