How to Build Deck Stairs

Calculating the step dimensions, laying out stringers and building a sturdy set of deck stairs.

Required Tools for this Project

Have the necessary tools for this DIY project lined up before you start—you’ll save time and frustration.

  • Hammer
  • Clamps with a reach of at least 18 in.
  • Circular saw
  • Corded drill
  • Chalk line
  • Level
  • Framing square
  • Handsaw
  • Stair gauge
  • Safety glasses
  • Sawhorses

Required Materials for this Project

Avoid last-minute shopping trips by having all your materials ready ahead of time. Here's a list.

  • 2x6x12 ft. (1)
  • 2x12x12 ft (3; you may need longer 2 x 12s for your stairs)
  • Decking for risers and treads
  • 3 in. deck screws