cost to replace stairs
1 Installing hardwood stairs costs approximately $100 to $200 per step, including labor and materials. 2  Assuming that the stair case has 17-20 stairs, thatâs a total estimated cost of $1,700 to $4,000.ardwood Stair Installation Prices. A staircase is one of the most visible parts of the home. By converting carpeted stairs to hardwood, you can markedly improve your homeâs interior design. For a relatively small project, however, stair installation costs can run quite high due to the amount of labor involved.