What's inside
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This plan makes a compact cabinet about 24 inches wide, 30 inches high, and 12 inches deep, with one adjustable shelf. It suits a workshop, pantry, or utility room. The dimensions are easy to change, but keep the cabinet square and make the shelf pins match on both sides. That matters more than fancy hardware.
Contents
Choose the size and layout
The plan uses a ¾-inch plywood carcass with a ¼-inch plywood back. Finished outside dimensions are approximately 24 inches wide, 30 inches high, and 12 inches deep. The interior opening is about 22½ inches wide and 28½ inches high. A ¾-inch shelf rests on four pins.
That depth works for cans, small tools, and folded linens, but not every large appliance or storage bin. Measure what you plan to store before cutting. If you increase the cabinet width, consider a thicker shelf or a front edging strip to limit sag under heavy loads.
Materials and tools
Use one ¾-inch, 4-by-8-foot sheet of plywood for the sides, top, bottom, and shelf. Cabinet-grade plywood gives cleaner edges and fewer internal voids; sanded construction plywood costs less and is adequate for a painted shop cabinet if you inspect it for gaps and flatness. Add one ¼-inch sheet for the back. You’ll also need wood glue, 1¼-inch screws, finish, and four shelf pins.
For accurate, repeatable holes, a 5 mm shelf-pin jig is helpful, though a carefully made drill guide can work for a one-off cabinet. A drill with a depth stop or taped bit makes it easier to avoid drilling through the sides. Use a saw with a straightedge guide, or have the sheet goods cut at the store and make final adjustments at home.
Cut list
Cut the following from ¾-inch plywood. These dimensions assume the top and bottom fit between the side panels:
| Part | Quantity | Cut size |
|---|---|---|
| Sides | 2 | 30 × 12 inches |
| Top and bottom | 2 | 22½ × 12 inches |
| Adjustable shelf | 1 | 22⅜ × 11¼ inches |
| Back | 1 | 24 × 30 inches, ¼-inch plywood |
The shelf is slightly narrower than the opening so it can move without binding. Its depth is also reduced to leave room for the back. Check your actual assembled opening before cutting the shelf; plywood thickness and small cutting errors can change the fit.
Lay out and drill the pin holes
Mark the front and back edges of each side, then choose a pin line about 1½ inches in from the cabinet front and another 1½ inches in from the back. Keep both lines parallel to the edges. The front setback leaves room for a door later, while the rear setback keeps pins clear of the back panel.
Set the first hole about 2½ inches above the bottom, then mark holes at 1-inch intervals. Stop about 2½ inches below the top. Use the jig’s registration edge against the same reference edge on both sides. Clamp the panels together with their inside faces up and drill both at once only if your setup keeps them perfectly aligned. Otherwise, drill separately from identical marks.
Drill to roughly ⅜ inch deep for standard 5 mm pins, checking the pin length and jig instructions. A hole that is too shallow may not seat the pin; a hole that goes through the panel is a visible mistake and can weaken the side. Practice on an offcut first. Vacuum the holes so sawdust doesn’t stop the pins from sitting fully.
Assemble the cabinet square
Dry-fit the sides, top, and bottom. Apply a thin, even bead of glue to the ends of the top and bottom, then fasten them between the sides with screws through the side panels. Predrill near plywood edges to reduce splitting, and keep the screw heads flush. Two or three screws per joint are usually enough for this small cabinet; avoid overtightening, which can strip the plies.
Measure diagonally across the front opening from corner to corner. Adjust the carcass until the two measurements match, then attach the back. A square, well-fastened back helps keep the cabinet from racking. If the diagonals differ, the shelf may bind or the pin rows may not line up cleanly.
Pick a back that suits the job
| Back option | Best for | Trade-off |
|---|---|---|
| ¼-inch plywood, glued and nailed | A sturdy cabinet that needs to resist racking | Costs more than thin hardboard |
| Thin hardboard, nailed | A light-duty cabinet kept in a dry room | Less durable if bumped or exposed to moisture |
| No full back; corner braces | A cabinet fixed securely to a wall | Less rigid and more dependent on careful mounting |
For most first-time builds, the ¼-inch plywood back is a forgiving choice. Use brads or small screws around the perimeter, spaced about 4 to 6 inches apart. If you choose hardboard to save money, don’t rely on it to hold a cabinet square after it has been removed or knocked around.
Fit the shelf and finish
Set four pins at the same height and place the shelf on them. Test at several positions before finishing. The shelf should lift out without scraping the sides. If it rocks, check that all four pins are the same type and fully seated; mismatched or partly inserted pins are a common cause.
Sand exposed edges to 150 or 180 grit. Seal plywood edges with primer or edge banding before painting; they absorb finish unevenly. For a basic shop cabinet, paint or clear finish is optional, but sealing the top and bottom edges helps in a humid room. Let the finish cure before loading the cabinet, and anchor a tall or heavily loaded cabinet to a wall stud with appropriate fasteners.
Spend where accuracy matters
A jig pays off if you expect to build more cabinets or want quick, evenly spaced rows. For one cabinet, a straight scrap-wood guide, a square, and careful measuring can do the job. If you use a jig, a pack of 5 mm shelf pins is inexpensive; check the pin diameter against the holes your jig makes rather than assuming all systems match.
Spend extra on flat, consistent plywood if the cabinet will be visible or painted with a smooth finish. The cheaper sheet is fine for a utility cabinet when you can inspect it and work around defects. In either case, a straight cut, matching hole layout, and square back will do more for the result than premium hardware.