Cost to Subfloor Repair & Replacement in Philadelphia, PA

$1,220–$6,100 in Philadelphia

22% above the national average · 1.22x cost multiplier

Expect to pay $1,220–$6,100 for a subfloor repair & replacement in Philadelphia, about 22% above the national benchmark. The Northeast region's contractor market and material costs account for most of this difference. The detailed breakdown below shows how budget, mid-range, and premium projects compare at Philadelphia prices.

Cost Breakdown in Philadelphia

Line Item	Low	Mid	High
Cost per sq ft	$4	$7	$12
Materials	$305	$976	$2,440
Labor	$488	$1,830	$4,270
Permits	$0	$122	$244
Total	$793+22% vs. national avg	$2,928+22% vs. national avg	$6,954+22% vs. national avg

Budget

Small patch repair (25-50 sq ft) of water-damaged plywood subfloor. Cut out damaged section, replace with matching plywood, secure to joists.

Mid-Range

Moderate area replacement (100-300 sq ft) of damaged subfloor with 3/4-inch CDX or tongue-and-groove plywood. Includes existing floor removal, joist inspection, and new subfloor installation.

Premium

Full room or multi-room subfloor replacement (300-600+ sq ft) including joist repair, mold remediation, new 3/4-inch AdvanTech or OSB subfloor, and glue-and-screw installation.

Material Options

Material prices below are national averages; availability in Philadelphia may shift costs slightly.

Material	Cost/Unit	Pros	Cons	Best For
CDX Plywood (3/4-inch)	$1.00-$1.50/sq ft	Industry standard, strong, widely available, accepts all flooring types	Swells when wet, can delaminate if exposed to moisture, heavier than OSB	Standard subfloor replacement in dry areasIndustry standard, strong, widely available, accepts all flooring types
OSB (Oriented Strand Board, 23/32-inch)	$0.80-$1.25/sq ft	Cheapest option, consistent strength, large panel sizes available	Swells permanently when wet (worse than plywood), rough surface	Budget replacements in areas with no moisture riskCheapest option, consistent strength, large panel sizes available
AdvanTech/Engineered Subfloor	$2.00-$3.00/sq ft	Moisture-resistant, won't swell, stiffer than plywood, 500-day weather exposure warranty	More expensive, may not be stocked at all suppliers	Bathrooms, kitchens, laundry rooms, and any area with moisture riskMoisture-resistant, won't swell, stiffer than plywood, 500-day weather exposure warranty
Tongue-and-Groove Plywood (3/4-inch)	$1.25-$2.00/sq ft	Interlocking edges reduce squeaks, stronger joint, smoother surface	Costs more than standard CDX, harder to install in tight spaces	Open living areas where squeak prevention mattersInterlocking edges reduce squeaks, stronger joint, smoother surface

Other Projects in Philadelphia

Full Kitchen Remodel

Full Bathroom Remodel

Roof Replacement (Asphalt Shingles)

Back to national average for Subfloor Repair & Replacement

Philadelphia Estimate

Typical Range

$1,220–$6,100

vs. National Average

22% above national

Cost Multiplier

1.22x

Cost Per sq ft

$4–$12

Estimates apply Philadelphia's 1.22x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.

See national average costs →