Whittier, Los Angeles County

Room Addition Cost in Whittier, CA

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

Historic Uptown Whittier has charming older homes with renovation potential. More affordable than West LA or South Bay. Strong local contractor community.

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 Whittier

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

Hayward
$63,000 – $173,250 | Alameda County
Larkspur
$75,000 – $206,250 | Marin County
Burlingame
$78,000 – $214,500 | San Mateo County
Danville
$72,000 – $198,000 | Contra Costa County
Bakersfield
$48,000 – $132,000 | Kern County
Pacifica
$72,000 – $198,000 | San Mateo County
Beverly Hills
$78,000 – $214,500 | Los Angeles County
Long Beach
$60,000 – $165,000 | Los Angeles County

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