How to Build Dog Stairs | A Weekend DIY Project

Building dog stairs starts with measuring furniture height, then cutting plywood stringers, adding treads and braces, and finishing with sanding and grip tape.

If you’ve got a senior dog struggling to hop onto the bed or couch, you’ve probably priced commercial pet stairs and winced. The good news is that a sturdy set of DIY dog stairs costs a fraction of store-bought options, and the build is well within reach of a weekend woodworker. This guide walks through the core construction method that published plans actually use, with the exact dimensions and materials you’ll need to get the job done right the first time.

What Measurements Do You Need Before Cutting?

The single most important number is the height of the furniture your dog will climb. Measure from the floor to the top of the mattress or cushion, then subtract 3 to 5 inches.

That subtraction matters because the stairs shouldn’t go all the way to the surface — the top step lands slightly below the furniture edge, which gives your dog a natural transition point and keeps the top step from acting like a ramp.

• Measure furniture height from floor to cushion top.
• Subtract 3–5 inches to get your target stair height.
• Divide that number by the number of steps you want (usually 2–3 for bed height) to get each step’s rise.

The Family Handyman’s published plan uses two 2-foot by 2-foot plywood squares for the side stringers, with stair cuts marked at 8 inches and 16 inches on each side before cutting the profile with a jigsaw. That yields a two-step staircase roughly 16 inches tall — a solid fit for most standard bed heights. A second published approach from The Spruce uses plywood strips 8 inches wide and 34 inches long for the stringers, with 19-1/2-inch pieces for treads and legs, which suits slightly taller furniture.

Whichever dimensions you use, the geometry rule stays the same: divide the total height into equal steps so your dog gets a consistent stride all the way up.

Materials and Tools for the Build

This project runs on basic lumber and hardware you can grab in one trip to the home center. The material list is short because the design is fundamentally two side panels, treads, and braces.

For the stringers, ¾-inch plywood is the safer choice — it holds screws firmly and resists twisting under your dog’s weight. If you already have ½-inch stock, add an extra brace down the middle to prevent flex.

The Step-by-Step Assembly Order

Cut every part before you pick up a screwdriver. Dry-fitting the frame first catches measurement mistakes while parts are still easy to fix.

1. Cut the stringers. Mark the stair profile on each plywood square or strip, then cut with a jigsaw or circular saw. Cut both stringers identically — clamp them together and cut both at once to guarantee a match.
2. Cut the treads and braces. Treads span the width between stringers; braces are short 2×4 or plywood blocks that stiffen the frame.
3. Dry-fit the frame. Set the stringers upright, slide the treads in place, and check everything with a level. Adjust before adding glue.
4. Attach braces. Fasten a back brace through the stringers for extra support — Dremel’s published plan specifies this step explicitly. Add a front brace just under the top tread if the span feels springy.
5. Install treads. Apply wood glue to the contact edges, set each tread, clamp, and drive screws through the stringers into the tread ends. Countersink the screw heads so they sit flush.
6. Sand everything. Round over sharp edges and knock down splinters, especially at the front lip of each tread where paws land.
7. Finish and add traction. Prime and paint or apply a clear finish. Once dry, stick adhesive grip tape on each tread where your dog’s paws actually land.

One honest trade-off worth noting: some quick online builds use stacked boxes or scrap wood, and those are fine for a weekend prototype but noticeably less durable. A plywood-and-brace build handles daily use for years; a box tower might last a season.

The whole project runs about 3–4 hours of active work, plus drying time for finish. If you’d rather compare ready-made options that support heavier breeds, our roundup of bed stairs for large dogs covers the sturdiest commercial alternatives.

Sizing Stairs for Your Dog’s Stride

Step height and tread depth both matter more than looks. The Family Handyman’s guidance is explicit: stair height should match both the furniture height and your dog’s physical ability.

For small dogs, keep each step rise under 7 inches. For larger breeds, you can push to 8–9 inches per step, but tread depth should stay at 10 inches or more so the full paw fits comfortably. Divide the total height into an equal number of steps rather than cramming an extra short step at the top — inconsistent rises are how dogs misstep.

If your dog is very old or has mobility issues, consider fewer, shallower steps with a wider footprint. The stairs can always sit slightly proud of the furniture height as long as the top step is stable. The Family Handyman’s DIY dog stairs plan includes full cutting diagrams and an assembly overview that pairs well with this guide.