How to Cut Steps Into a Sloped Lawn

Calculate the rise and run of the slope where the steps will be. To do this, set a wooden board on top of the slope and use a level to make sure it is straight. Measure the height of the board from the bottom of the slope using a tape measure. This is the rise. Set the board upright at the bottom of the slope, and measure the length from the top of the slope to the board. This is the run.

Determine the height and tread for each step. An ideal measurement is a 15-inch tread and a 6-inch riser. The tread needs to be large enough for a foot to safely fit on. The riser is the height of the step. You will need stones of appropriate size for both the tread and the riser. The length of the stones depends on how wide you intend the steps to be.

Excavate the slope to create the rough dimensions of your planned steps, making sure to stick to the same riser and tread measurements for each step so users don't trip. Use a measuring tape to make a rough outline.

Excavate down to 12 inches at the base of your slope where the first tread stone will go. This will act as the foundation of your steps and should be secure and deep. Fill with 4 inches of crushed rock, followed by 4 inches of concrete, and allow it to dry.

Dig 2 to 3 inches on each side of the base tread, and place a support stone to keep it anchored. The size of the support stone does not matter.

Apply mortar to the dry concrete. Lay the first flagstone (tread) so it is level (use a level to make sure), and place it at the same height as the ground around it.

Apply mortar to the back of first tread and place the first riser stone. Allow it to dry.

Excavate 6 inches of soil behind the first riser stone to prepare for the next tread area. Add 3 inches of crushed rock followed by 2 inches of mortar.

Lay the next flagstone so it is hanging over the first riser by 2 inches. Apply mortar between the treads.

Repeat the steps until all the stairs are constructed. Allow the area to set for two weeks before use.