What's inside
As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.
A bathroom step stool is one of the best first builds because it teaches four core skills — accurate crosscuts, simple joinery, cutting a handle opening, and finishing for moisture — without requiring a lot of lumber or complex angles. This plan is for a small, sturdy stool about 8 inches tall with a carrying cutout in the top. It’s sized for kids reaching the sink and for adults who need a little boost, and it can be built in an afternoon with basic power tools.
Contents
Dimensions and materials
This stool is designed around a single 1×10 board to keep costs and waste down. Finished size is 14 inches long, 9.25 inches wide (the actual width of a 1×10), and 8 inches tall. That height clears most bathroom baseboards and gets a small child to sink level without being tippy. The top is 14″ x 9.25″, the two legs are 9.25″ wide x 7.25″ tall (3/4″ top thickness subtracted), and the single center stretcher is 12.5″ long x 3.5″ wide.
For wood, use solid wood, not plywood or MDF. In a bathroom, plywood edges wick moisture and MDF swells and fails. A single 6-foot 1×10 gives you everything with one extra leg piece if you miscut. Poplar is the best beginner balance of price, stability, and paintability. Pine is cheaper but dents easily and knots will tear out when you cut the handle slot. Oak is stronger and more water-resistant but harder to sand and drill.
| Wood | Cost for 1x10x6′ | Pros | Cons | Best For |
|---|---|---|---|---|
| Poplar | $18 – $26 | Stable, fine grain, takes paint well, easy to cut | Can have green/gray streaks if staining | Painted stools |
| Select Pine | $12 – $18 | Cheapest, widely available, light to carry | Soft, dents, knots cause splintering | Budget build or practice piece |
| Red Oak | $30 – $45 | Very strong, resists dents, holds screws better | Open grain needs filling, heavier | Natural finish, heavy daily use |
You will also need wood glue (Titebond III for moisture resistance), 1-1/4″ wood screws, 120 and 180-grit sandpaper, and a moisture-resistant finish. Do not use standard interior wood glue alone for the joints; it will eventually creep in a humid bathroom. The screws are insurance while the glue cures, not the primary strength.
Tools and cut list
You don’t need a shop full of tools. A circular saw with a straight-edge guide or a miter saw will handle all crosscuts. The carrying cutout requires a drill and a jigsaw — a router is not needed and makes the job more dangerous for beginners. An random orbital sander saves a lot of time, but a sanding block works if you are patient.
Cut list from a 1×10 (3/4″ x 9.25″ actual):
Top: 1 pc at 14″ long. Legs: 2 pcs at 7.25″ long. Stretcher: 1 pc at 12.5″ long ripped to 3.5″ wide (or buy a 1×4 for this piece). Mark the stretcher centered 3 inches up from the bottom of the legs — that leaves toe room and maximizes resistance to racking. Pre-sand all pieces to 120-grit before assembly; it’s much harder to sand inside corners later.
Cutting the carrying handle
The handle is a 4-inch long by 1-inch wide slot centered on the top. That size fits most hands without weakening the top. If you make it wider than 1.25 inches or within 2 inches of the ends, the top can crack along the grain under load.
Layout: Find the center of the top (7″ from each end, 4.625″ from each side). Mark a 4″ x 1″ rectangle. Drill a 3/8″ hole inside each end of the rectangle, staying 1/8″ inside your lines. Thread the jigsaw blade through one hole and cut slowly to the next, keeping the saw base flat. Do not force the turn at the ends — stop, back up slightly, and approach the corner again. Cut in the waste side of the line and file to the line afterwards.
Failure mode to avoid: blowing out the bottom face when the drill exits. Clamp scrap wood under the top when you drill. After cutting, ease all edges of the slot heavily with 120-grit, then 180-grit. A sharp, square handle edge will dig into fingers and splinter within weeks in a humid room. A 1/8″ roundover by hand sanding is enough.
Assembly step by step
Dry-fit everything first. Stand the legs up and set the top on them to check for wobble on a known flat surface. If a leg rocks, mark the high spot and sand it flat now — you cannot fix a wobbly stool with finish.
Attach the stretcher to the legs. Apply a thin, even bead of glue to both leg contact areas, position the stretcher so its ends are inset 3/4″ from the outside face of each leg (this hides end grain and looks cleaner), and clamp. Drill two pilot holes per side with a countersink bit and drive 1-1/4″ screws. Pilot holes are mandatory in hardwood and near board ends; skipping them will split the stretcher and you will have to recut it.
Next, attach the top. Run a bead of glue along the top edge of both legs, set the top so it overhangs the legs by 1/4″ on the front and back and is flush on the sides, and clamp. Screw from the top down with 1-1/4″ screws: four screws per leg, set in 3/4″ from the edge, countersunk just below the surface. If you hate visible screws on top, screw up from inside the legs at an angle, but for a bathroom stool, top-down screws with filler are stronger and simpler for beginners. Fill screw heads with exterior wood filler if painting.
Check for square immediately. Measure diagonals across the bottom — if they differ by more than 1/16″, the stool will rack sideways under weight. Tap the longer diagonal gently with a mallet before the glue sets.
Finishing for a bathroom
Bathroom finishes fail because people use furniture wax or standard polyurethane and leave end grain unsealed. End grain absorbs steam like a sponge. You need a film finish that seals all six sides of every piece, including the bottoms of the legs.
For a painted stool: prime with a stain-blocking primer, then two coats of semi-gloss or gloss acrylic enamel. Enamel is non-negotiable here — flat or satin wall paint scuffs and holds moisture. Lightly sand with 180-grit between coats.
For a natural look: apply three coats of oil-based polyurethane or water-based polyurethane rated for floors. Water-based dries faster and yellows less, oil-based is slightly more forgiving to brush. Sand lightly between coats with 220-grit and wipe off all dust. Pay extra attention to the handle slot and the leg bottoms; add an extra coat there. Let the finish cure 48-72 hours before heavy use — it may feel dry in hours but will still dent and stick to tile if loaded early.
Add four small adhesive rubber feet to the leg bottoms. They prevent sliding on tile and keep standing water from wicking directly into the wood. Replace them yearly; they compress and lose grip.
Load and safety checks
This design, properly glued and screwed in solid wood, will hold 200+ pounds of static vertical load. It is not built for lateral rocking — no small stool is. Before you let a child use it, test it yourself: stand on it and gently shift weight to each corner. If you hear creaking or see the legs splay, the stretcher joint is weak. The most common beginner mistake is using too little glue and relying on screws. Screws hold the joint while glue dries; glue provides long-term shear strength. Use both.
Keep the leg height at 7.25 inches. Taller than 9 inches without widening the base makes tip-overs much more likely. If you need a taller stool, widen the top to 16 inches and add a second stretcher. Do not scale this plan up to chair height.