Pomona, Los Angeles County

Room Addition Cost in Pomona, CA

Pomona remodeling costs are 10% belowthe California state average. Here's what a typical room addition costs in Pomona 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 Pomona

Inland LA County with affordable remodeling costs. Arts district revitalization is driving residential renovation. Many older homes with strong value-add renovation potential.

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 Pomona

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

Los Altos Hills
$84,000 – $231,000 | Santa Clara County
Palm Desert
$57,000 – $156,750 | Riverside County
Encino
$66,000 – $181,500 | Los Angeles County
Mission Viejo
$63,000 – $173,250 | Orange County
Redwood City
$75,000 – $206,250 | San Mateo County
Larkspur
$75,000 – $206,250 | Marin County
Burbank
$60,000 – $165,000 | Los Angeles County
Calabasas
$69,000 – $189,750 | Los Angeles County

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