If you hire a stair renovation job out, it can be pretty expensive! Generally, the cost of replacing carpeting with wood stairs can range from $3,000 to $5,500. The price will vary from project to project, obviously, depending on whether you have a short set of stairs or a longer staircase. Also whether you have a landing, balusters, and open or closed railings factors into the price.  We have had hardwood stairs professionally installed in a previous home that we owned and I was SHOCKED by how expensive it was. It's been almost 20 years since we did it, so I don't recall the exact price, but the stairs cost more than having hardwoods installed in the entire first floor of the house.