making stairs for a deck

"Build Stunning Deck Stairs: A Step-by-Step Guide"

By Jessica JonesMarch 12, 2026

Embarking on a DIY project to enhance your outdoor space? Building stairs for your deck can significantly improve its accessibility and aesthetics. This comprehensive guide will walk you through the process, from planning to execution, ensuring your project is not only functional but also safe and visually appealing.

Planning Your Deck Stairs

Before you grab your tool belt, it's crucial to plan your deck stairs meticulously. Consider the following factors:

Height and Rise: Measure the height from the ground to the top of your deck. The total rise should be divided into equal riser heights, typically around 7 to 7.5 inches, to comply with building codes.
Run and Tread: The run is the horizontal distance from the nosing (front edge) of one tread to the nosing of the next. A comfortable run is around 10 to 11 inches.
Stringers: Stringers are the supporting structures that hold the treads and risers in place. They should be spaced 16 inches on center (o.c.) for standard 2x12 stringers.
Handrail and Guardrails: Ensure your stairs comply with local building codes regarding handrails and guardrails, especially if your deck is higher than 30 inches off the ground.

Gathering Materials and Tools

With your plan in hand, it's time to gather the necessary materials and tools. You'll need:

👉 Deck Stairs Setup You Should Follow (DIY Guide)

a man kneeling on the ground holding a piece of wood

Pressure-treated lumber for stringers, treads, and risers
Galvanized hangers and screws for attaching treads and risers
Post-to-post handrail kit (if applicable)
Circular saw
Drill and driver set
Tape measure
Level
Speed square
Safety gear (gloves, safety glasses, etc.)

Building the Stringers

The stringers form the backbone of your deck stairs. Here's how to build them:

Cut your stringers to length, ensuring they extend at least 12 inches beyond the top and bottom of your staircase.
Mark the center of each stringer, then mark the rise and run measurements along this center line. Connect these marks to create the outline of your stringer notches.
Using a jigsaw or circular saw, cut out the notches. Ensure the notches are slightly smaller than your treads to create a snug fit.
Drill pilot holes and attach galvanized hangers to the stringers, spacing them according to your rise and run measurements.

Assembling the Treads and Risers

Now that your stringers are complete, it's time to attach the treads and risers:

two men are working on some wooden steps outside with tools and construction materials around them

the steps are being built to allow people to climb up and down from the deck

Cut your treads and risers to size. Ensure the treads are slightly smaller than the stringer notches to allow for expansion and contraction.
Starting at the bottom, place a tread on the hangers and secure it with galvanized screws. Ensure it's level and flush with the stringer notches.
Attach a riser to the back of the tread, securing it with screws driven through the stringers.
Repeat this process until all treads and risers are attached.

Installing Handrails and Guardrails

For safety and compliance with building codes, install handrails and guardrails as needed:

Follow the manufacturer's instructions for your post-to-post handrail kit, ensuring it's securely attached to the stringers and deck frame.
Install guardrails along open sides of the staircase, using balusters spaced no more than 4 inches apart.

Congratulations! You've successfully built stairs for your deck. Regularly inspect your stairs for any signs of wear or damage, and maintain them to ensure their longevity and safety.