Subfloor Repair & Replacement Cost Calculator
Estimate the cost of repairing or replacing damaged subfloor based on area size, damage severity, and your region.
Last updated: March 25, 2026
Subfloor Repair & Replacement Cost Calculator
Estimate the cost of repairing or replacing damaged subfloor based on area size, damage severity, and your region.
Estimated Total
$2,350
Itemized Breakdown
This calculator provides estimates based on national averages adjusted for your region. Actual costs may vary significantly based on specific project conditions, contractor availability, material prices, and local market factors. Always get at least 3 quotes from licensed, insured contractors before starting your project.
Want the full picture?
Read our complete Subfloor Repair & Replacement cost guide with material comparisons, contractor tips, savings strategies, and regional pricing data.
Quick Cost Reference
Cost by Tier
Small patch repair (25-50 sq ft) of water-damaged plywood subfloor. Cut out damaged section, replace with matching plywood, secure to joists.
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.
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.