- Subfloor replacement usually costs $750 to $2,750, about $1,600 typical.
- Replacing the plywood or OSB subfloor under one room, about 200 to 300 square feet.
What subfloor replacement costs
Most homeowners pay $750 to $2,750 for subfloor replacement, and $1,600 is a typical price. Replacing the plywood or OSB subfloor under one room, about 200 to 300 square feet. By the square foot, HomeAdvisor put it at $3 to $10, with $6.50 in the middle.
| Price | |
|---|---|
| Low end | $750 |
| Typical | $1,600 |
| High end | $2,750 |
| Per square foot | $3 to $10 |
The range blends Fixr and HomeAdvisor (method below). Where you live matters: Koira's estimate is $1,379 in Arkansas and $1,969 in Hawaii.
What drives the price
- The cause. Water damage under toilets, tubs and dishwashers is the usual reason. The leak must be fixed first.
- Joists. If the joists below are rotted too, the job becomes structural.
- Finished floor. The flooring on top has to come up and go back, which is often the bigger cost.
Subfloor replacement cost by room
| Room | Price | Source |
|---|---|---|
| Bathroom | $120 to $400 | HomeAdvisor |
| Bedroom | $450 to $1,500 | HomeAdvisor |
| Kitchen | $600 to $2,000 | HomeAdvisor |
Subfloor replacement cost by state
Koira estimates for each state, built from the national $750 to $2,750. About 60% of a subfloor replacement price is labor, and only that part is scaled by the state's median wage for construction and extraction workers. A starting point, not a quote.
| State | Low | Typical | High |
|---|---|---|---|
| Alabama | $661 | $1,411 | $2,425 |
| Alaska | $871 | $1,859 | $3,195 |
| Arizona | $739 | $1,576 | $2,708 |
| Arkansas | $647 | $1,379 | $2,371 |
| California | $842 | $1,795 | $3,086 |
| Colorado | $762 | $1,626 | $2,796 |
| Connecticut | $841 | $1,795 | $3,085 |
| Delaware | $749 | $1,597 | $2,745 |
| District of Columbia | $830 | $1,770 | $3,043 |
| Florida | $673 | $1,436 | $2,468 |
| Georgia | $676 | $1,443 | $2,480 |
| Hawaii | $923 | $1,969 | $3,385 |
| Idaho | $724 | $1,545 | $2,656 |
| Illinois | $909 | $1,939 | $3,333 |
| Indiana | $767 | $1,637 | $2,814 |
| Iowa | $749 | $1,599 | $2,748 |
| Kansas | $715 | $1,526 | $2,623 |
| Kentucky | $702 | $1,497 | $2,572 |
| Louisiana | $677 | $1,445 | $2,484 |
| Maine | $756 | $1,612 | $2,771 |
| Maryland | $753 | $1,605 | $2,759 |
| Massachusetts | $885 | $1,889 | $3,247 |
| Michigan | $762 | $1,626 | $2,796 |
| Minnesota | $849 | $1,810 | $3,111 |
| Mississippi | $654 | $1,394 | $2,397 |
| Missouri | $767 | $1,635 | $2,811 |
| Montana | $761 | $1,623 | $2,789 |
| Nebraska | $706 | $1,507 | $2,590 |
| Nevada | $767 | $1,635 | $2,811 |
| New Hampshire | $754 | $1,609 | $2,765 |
| New Jersey | $855 | $1,824 | $3,136 |
| New Mexico | $677 | $1,444 | $2,483 |
| New York | $832 | $1,775 | $3,051 |
| North Carolina | $673 | $1,436 | $2,469 |
| North Dakota | $762 | $1,626 | $2,795 |
| Ohio | $770 | $1,642 | $2,822 |
| Oklahoma | $667 | $1,424 | $2,447 |
| Oregon | $800 | $1,706 | $2,932 |
| Pennsylvania | $757 | $1,616 | $2,777 |
| Rhode Island | $776 | $1,656 | $2,847 |
| South Carolina | $675 | $1,439 | $2,473 |
| South Dakota | $679 | $1,448 | $2,489 |
| Tennessee | $682 | $1,454 | $2,500 |
| Texas | $672 | $1,433 | $2,462 |
| Utah | $732 | $1,561 | $2,684 |
| Vermont | $751 | $1,603 | $2,755 |
| Virginia | $727 | $1,550 | $2,664 |
| Washington | $871 | $1,857 | $3,192 |
| West Virginia | $735 | $1,569 | $2,696 |
| Wisconsin | $781 | $1,666 | $2,864 |
| Wyoming | $752 | $1,603 | $2,756 |
Rural areas and cities in the same state can differ a lot.
How we got these numbers
| Guide | Range | Average | Use |
|---|---|---|---|
| Fixr | $600 to $2,500 | $1,600 | Counted |
| HomeAdvisor | $900 to $3,000 | $1,560 | Counted |
How the subfloor replacement range is combined: low end from the middle of the guides' lows, high end from the middle of their highs, typical from the middle of their averages (a range's midpoint where no average is given). Figures read on each guide's page on October 9, 2026.
Labor share used: 60%. Subfloor work is demolition and carpentry with modest material, so labor is the larger part. Koira's assumption. State factor: the state's median hourly wage for construction and extraction workers over the national $28.63 (BLS, May 2025), kept between 0.7 and 1.4.
For contractors: price this job in Koira
Flooring is priced by the square foot, so the estimate should show the area, the material, the tear-out and the trim as their own lines.
On Koira's free Office plan you build the estimate, text it, collect the deposit and turn it into an invoice when the subfloor replacement is done. Price this job in Koira, free.
Sources: Fixr, subfloor replacement cost; HomeAdvisor, subfloor replacement cost; BLS Occupational Employment and Wage Statistics, May 2025 (state and national files). Prices checked October 9, 2026. More for your trade: how the trade runs on Koira.