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.

Secure a wobbly tread with nails Nails can work magic like screws when it comes to repairing wobbly or creaking stair treads. If using nails to secure your stair treads, make sure you nail treads to the stringer board (the board that runs along either side of a flight of stairs) at a 45-degree angle.

Inspect the staircase for any damaged or rotting wood. Replace or repair any steps, balusters, or handrails that are in poor condition. Fill in cracks, holes, or gaps with wood filler. Allow it to dry, then sand the repaired areas until they are smooth and level.

One way you can fix creaking stairs from above is by screwing the front of the tread onto the riser. You can do this by drilling clearance holes for the thick part of the screws (called the shank) through the tread and thinner pilot holes (for the point of the screws) into the top of the riser.