How to Build Porch Stairs | Simple Beginners Guide

Building porch stairs can be a great DIY project for beginners. Not only can it add value to your home, but it can also improve its aesthetic appeal. 

However, it can be a daunting task if you don’t know where to start. In this simple beginner guide, we’ll walk you through the steps on how to build porch stairs.

How to Build Porch Stairs

1. Gather the necessary tools and materials

Before you start building, make sure you have all the necessary tools and materials. Some of the essential tools you’ll need include a circular saw, drill, hammer, measuring tape, and level. As for the materials, you’ll need lumber, concrete mix, screws, and nails.

2. Determine the size of your stairs

The first step in building porch stairs is to determine the size of your stairs. Measure the height from the ground to the top of your porch to determine the number of steps you’ll need. 

Divide the height by the desired height of each step to get the total number of steps. Don’t forget to factor in the width and depth of each step.

3. Cut the stringers

Stringers are the structural supports that run along the sides of the staircase. To cut the stringers, you’ll need to use a framing square and a circular saw. Make sure to measure and mark each stringer carefully before cutting.

4. Build the frame

Once you’ve cut the stringers, it’s time to build the frame. Start by attaching the stringers to the porch using screws and nails. Make sure to check that the stringers are level before moving on to the next step.

5. Install the treads and risers

The treads are the horizontal boards that you step on, while the risers are the vertical boards that connect the treads. Install the treads and risers on each step, starting from the bottom. Make sure to secure them tightly using screws and nails.

6. Secure the railing

Finally, you’ll need to secure the railing to your porch stairs. This is an important safety feature that will prevent anyone from falling off the stairs. You can use pre-made railing sections or build your own.

Step-by-step Guide on How to Build a Simple Porch Step:


  • Stringers: 2×6 or 2×8 lumber, depending on the height of the step
  • Tread boards: 1×12 lumber
  • Riser boards: 1×6 or 1×8 lumber
  • Concrete footings
  • Nails or screws
  • Drill
  • Saw
  • Level
  • Tape measure
  • String line


  1. Plan and Measure: Determine the desired height and width of your porch step. For a comfortable step, the rise should be between 6 and 8 inches, and the run should be around 11 inches.
  2. Cut the Stringers: Measure and cut the stringers to the appropriate length. The length of each stringer should be equal to the height of the step plus the desired overhang.
  3. Dig and Pour Footings: Dig holes for the footings, ensuring they are deep enough to reach frost depth in your area. Pour concrete into the holes and set the stringers upright, making sure they are plumb and level. Allow the concrete to cure for at least 24 hours before proceeding.
  4. Attach Riser Boards: Measure and cut the riser boards to the appropriate height. Attach the riser boards to the stringers using nails or screws. Ensure the risers are flush with the front of the stringers.
  5. Attach Tread Boards: Measure and cut the tread boards to the appropriate width. Attach the tread boards to the stringers using nails or screws. Ensure the treads are overhang the risers by about 1 inch.
  6. Finish and Protect: Apply a sealant or stain to the wood to protect it from the elements.
  • Use pressure-treated lumber for outdoor projects to resist rot and decay.
  • Pre-drill holes for nails or screws to prevent splitting the wood.
  • Use a level to ensure that all components are level and plumb.
  • Double-check all measurements before cutting and attaching boards.
  • Use a string line to mark the location of your stairs.
  • Dig the holes for your footings and pour the concrete.
  • Set the stringers in place and attach them to the footings.
  • Attach the tread boards and riser boards.
  • Apply a sealant or stain to the wood.

Here is the minimum width for porch steps:

  • 36 inches for a single-family dwelling
  • 48 inches for a multi-family dwelling

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