Cost to Subfloor Repair & Replacement in Portland, OR

$1,180–$5,900 in Portland

18% above the national average · 1.18x cost multiplier

In Portland, a subfloor repair & replacement runs $1,180 to $5,900 on average — about 18% above what homeowners pay nationwide. The West Coast market's labor costs account for most of the gap, with material pricing and local permitting fees adding to the spread. Use the cost table below to compare budget, mid-range, and premium options side by side.

Cost Breakdown in Portland

Line Item	Low	Mid	High
Cost per sq ft	$4	$7	$12
Materials	$295	$944	$2,360
Labor	$472	$1,770	$4,130
Permits	$0	$118	$236
Total	$767+18% vs. national avg	$2,832+18% vs. national avg	$6,726+18% 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 Portland 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 Portland

Earthquake Retrofitting / Seismic Retrofit

Roof Replacement (Asphalt Shingles)

Full Kitchen Remodel

Back to national average for Subfloor Repair & Replacement

Portland Estimate

Typical Range

$1,180–$5,900

vs. National Average

18% above national

Cost Multiplier

1.18x

Cost Per sq ft

$4–$12

Estimates apply Portland's 1.18x regional cost multiplier to national averages. Actual bids vary by contractor, project scope, and timing.

See national average costs →