The cost to repair a subfloor varies widely based on moisture, repair extent, and materials. Typical factors include assessment time, removal of damaged sections, and replacement with new plywood or oriented strand board. Cost estimates generally combine materials and labor to give a clear price range.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Subfloor Material (Plywood/OSB) | $1.50/sq ft | $2.75/sq ft | $4.50/sq ft | Includes 3/4 in or 23/32 in sheets |
| Labor for Removal | $1.00/sq ft | $2.00/sq ft | $3.50/sq ft | Depends on exposure area |
| Labor for Installation | $1.50/sq ft | $2.75/sq ft | $5.00/sq ft | Includes fasteners and leveling |
| Moisture/Structural Repair | $200 | $800 | $2,000 | Joist or beam work may add cost |
| Permits & Inspection | $0 | $100 | $400 | Depends on locality |
| Finishing Subfloor Edgework | $100 | $350 | $800 | Rim and transition work |
Overview Of Costs
Cost ranges reflect basic replacement in typical homes and assume a standard 100 sq ft area. Assumptions: dry conditions, no extensive mold, standard plywood or OSB, and standard access for removal. Projects may require additional materials or specialized fasteners. The totals below include both materials and labor where noted, with per-unit pricing shown for clarity.
For a 100 sq ft repair, typical totals span from a low around 1,300 to a high near 6,000, depending on damage severity and regional pricing. In many cases, homeowners see a mid-range cost of about 2,800 to 4,600 when joists are intact and moisture is controlled. Price at a glance factors include moisture remediation, structural repairs, and the complexity of access.
Cost Breakdown
Below is a table that separates key cost components. The numbers reflect common scenarios and include a mix of per-square-foot pricing and fixed charges.
| Materials | Labor | Equipment | Permits | Delivery/Disposal | Warranty | Contingency | Taxes |
|---|---|---|---|---|---|---|---|
| $1.50–4.50/sq ft | $1.50–5.00/sq ft | $0.20–0.50/sq ft | $0–$400 | $0–$150 | Typically 1 year | 5–15% of subtotal | Varies by state |
What Drives Price
Concrete factors include subfloor material choice, extent of damage, and required structural repairs. Moisture level can trigger additional remediation steps, while joist repair or replacement adds significant cost. For example, damaged framing may necessitate sistering or replacement of a few joists, elevating both materials and labor.
Specific drivers to watch:
– Subfloor material: plywood vs OSB and thickness (3/4 in vs 1/2 in affects costs)
– Moisture remediation: dehumidification or mold treatment if present
– Structural repairs: localized joist repair or beam reinforcement
– Access and removal: tight spaces or elevated areas increase labor time
Ways To Save
To control cost, consider staged repairs, bulk material orders, or combining subfloor work with adjacent renovations. DIY inspection and minor repairs may reduce expenses, but structural work should be handled by professionals to ensure safety and compliance.
Regional Price Differences
Prices vary by region due to labor markets and material availability. In the Midwest, a typical subfloor repair may trend toward the lower end, while the West Coast can be higher due to labor rates. The Southeast often sits in the mid-range. Expect regional deltas of roughly 5–25% between Urban, Suburban, and Rural areas.
Labor, Hours & Rates
Labor cost depends on crew size and time. A standard crew of two may complete 100 sq ft in 6–10 hours, with hourly rates ranging from $45 to $95 per hour per worker. For larger or more complex jobs, add 15–25% for extra hours. Assumptions: region, specs, labor hours.
Real-World Pricing Examples
Scenario cards illustrate typical outcomes with different scopes.
Basic – 100 sq ft area, minimal damage, plywood replacement only. Specs: 1 layer plywood, no joist work. Hours: 6–8. Total: $1,300–$2,000. Per-unit: $13–$20/sq ft.
Mid-Range – 100 sq ft, partial joist repair, moisture mitigation. Hours: 8–12. Total: $2,500–$4,000. Per-unit: $25–$40/sq ft.
Premium – 150–200 sq ft, extensive joist work, mold remediation, and transition work. Hours: 14–20. Total: $5,000–$6,500. Per-unit: $33–$55/sq ft.
Assumptions: region, specs, labor hours.