The average cost to repair or replace stairs is $1,000 to $2,000, including materials and labor. Staircase repair costs are influenced by design complexity, material choice, labor rates, and stair shape. Common stair repairs include painting, carpeting, and structural improvement with specific material types.

For small cracks in a stair tread, you can use wood glue to fix the stair tread back into shape. However, if the cracks are large or seem to be affecting the strength of the tread when taking the load, you might want to replace the treads altogether.