What's inside
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A three-drawer desktop cabinet is a useful first furniture project: it fits on a bench or desk, needs only a few parts, and teaches you how to build square boxes and fitting drawers. The key is to plan the drawer openings before cutting. Small measurement errors add up quickly, and a drawer that is only a little too wide can bind.
Contents
Choose a practical size
For a first build, aim for a cabinet about 18 inches wide, 12 inches deep, and 12 inches high. That leaves room for three shallow drawers without making the cabinet awkward to move. Adjust the dimensions to suit your desk, but keep the cabinet at least 2 inches narrower than the available space and leave a little clearance behind it for cords or a wall.
Use 3/4-inch plywood for the sides, top, bottom, and fixed shelf or drawer dividers. A 1/4-inch plywood back keeps the case square without adding much weight. For drawer sides and fronts, 1/2-inch plywood is easy to work with; 1/4-inch plywood is suitable for drawer bottoms if the drawers will hold light office supplies. If you expect to store heavy tools, use thicker bottoms and stronger joinery.
Tools and materials
A circular saw with a straightedge guide can make accurate cuts, though a table saw is quicker for repeated parts. You’ll also need a drill-driver, tape measure, square, clamps, sandpaper, wood glue, and screws. A brad nailer is convenient for the back and drawer bottoms, but a hammer and small nails work too. Cut carefully: a cabinet that is out of square can make all three drawers stick.
For drawer slides, compare the two common options below. Side-mount slides are forgiving and widely available, but require more clearance. Simple wood runners cost less and avoid buying hardware, though they take more fitting and can swell or stick as humidity changes.
| Option | Typical clearance | Best for | Trade-off |
|---|---|---|---|
| Side-mount ball-bearing slides | About 1/2 inch per side; check the package | Predictable movement and frequent use | Cost more and require accurate, parallel mounting |
| Wood runners | Depends on the runner design | A low-cost cabinet with simple tools | Need careful fitting and may bind with seasonal movement |
For a beginner using purchased hardware, choose 12-inch side-mount drawer slides if your cabinet depth allows them. Confirm the required side clearance and closed length on the packaging before designing the drawer. Slides are not all interchangeable, and a nominal 12-inch slide may need a cabinet deeper than 12 inches.
Plan the openings and drawer sizes
Make a simple front-view sketch and divide the cabinet height into three openings. With an interior height of 10 1/2 inches, for example, you might leave roughly 3 1/4 inches per opening and use thin dividers between them. The exact layout depends on the case construction and slide hardware. Measure the actual openings after assembling the case rather than relying only on the drawing.
For side-mount slides, subtract the manufacturer’s stated clearance from the opening width. If the opening is 16 inches wide and the slides need 1/2 inch on each side, the drawer’s outside width should be 15 inches. Leave the drawer front slightly narrower than its opening—around 1/16 inch of clearance at each side is a useful starting point—so it doesn’t scrape when the wood moves. Measure each opening separately; even a carefully built case can vary by a fraction of an inch.
Build the cabinet case
Cut matching sides, top, and bottom, then dry-fit them on a flat surface. Check that the corners are square by measuring both diagonals; if the measurements differ, adjust the case before fastening it. Apply glue to the joints, clamp the case, and drive screws through the sides into the top and bottom. Drill pilot holes to reduce splitting, especially near plywood edges.
Install a center divider or fixed shelf if your layout needs one, checking that it is level and parallel with the case bottom. Attach the back only after checking the diagonals again. A square 1/4-inch back helps lock the cabinet in shape; if you nail it on while the case is skewed, it will hold that twist in place.
Make and fit the drawers
Build each drawer as a box with the front and back between the sides. Glue and screw the corners, or use small nails with glue if the drawers will carry light loads. Keep the boxes square and identical in depth. Attach the drawer bottoms after checking the diagonals; a bottom installed on a twisted box can make the drawer rack and jam.
Install the slides according to their instructions, keeping the cabinet members level and the drawer members parallel. Use a spacer block to repeat the same position for all three. Test each drawer before adding finished fronts. If one binds, check for a skewed case, uneven slide height, or a drawer that is too wide. Don’t force it; remove the drawer and correct the cause.
Attach the fronts with a consistent gap, starting with the middle drawer and working outward. Temporary shims or playing cards make useful spacers. Drill handle holes only after confirming the fronts sit evenly. For a cleaner finish, break sharp edges with 120-grit sandpaper, then sand to 180 grit and apply a wipe-on finish or paint. Avoid putting finish on slide surfaces unless the hardware instructions allow it.
Where to spend and where to save
Good plywood matters more than decorative hardware. Flat, void-free panels are easier to assemble and produce drawers that fit reliably; warped or badly chipped plywood can turn a simple build into a repair job. A combination square is useful for checking cuts and slide positions. A basic one is fine if it reads accurately—there’s no need to buy a premium layout tool for this cabinet.
You can also save money by using wood runners, leftover plywood for drawer bottoms, and simple round knobs. Spend extra only where it solves a real problem: reliable slides are worthwhile if the drawers will be opened often or carry heavier contents. Build the cabinet square, verify each opening, and fit the drawers one at a time; those steps matter more than expensive tools.