What subfloor means
The subfloor is the structural layer of plywood, OSB or boards fastened to the joists, under the finished flooring and any underlayment.
Where it matters on a flooring job
Squeaks, soft spots and bad flatness under new flooring start at the subfloor. Check it before you quote; screwing it down, patching or replacing sections should be its own line.
What it costs
Koira's subfloor replacement cost guide puts a typical job at $1,600, with most between $750 to $2,750. The guide shows its sources and what moves the price. The flooring cost calculator prices a job line by line.
Work it out
- Free calculator: Flooring cost calculator
- Cost guide: Subfloor replacement cost
- Tools, templates and guides: Free flooring resources