A cabinet is, at heart, a box with a door. That simplicity is deceptive: almost every principle of carpentry lives inside that box — square, joinery, tolerances, finish — which is why it's the best first real project you can take on.
If this is your first time, here's what's worth knowing before you cut.
Choose the material carefully
This is the decision that shapes the result most.
Plywood: the best choice to start with. It's stable, holds weight well, doesn't bow with humidity the way other panels do, and grips screws firmly. Its weakness is the exposed edges, which need edge banding.
MDF: a perfectly smooth surface, ideal if you're painting, and very cheap. But it's heavy, hates moisture, and crumbles if you screw near an edge without pre-drilling.
Solid wood: beautiful and long-lasting, but it moves with humidity changes. A design that ignores that movement ends up cracked. Save it for your second or third project.
For a first cabinet: 18 mm plywood for the carcass, 6 mm plywood for the back.
Design with dimensions that work
Don't invent proportions from scratch. These are proven by decades of use:
- Base cabinet: 90 cm tall including the countertop, 60 cm deep
- Wall cabinet: 30 to 35 cm deep
- Door width: 45 cm per leaf maximum — beyond that they sag
- Toe kick: 8 to 10 cm tall and set back 5 cm, so you can stand close
Draw the piece with every dimension before touching the saw, and write a cut list part by part. It's the step that prevents the most mistakes.
Joinery, simplest to strongest
Butt joint with screws: the face of one piece against the edge of another. Fast and acceptable if you pre-drill and use glue. The screws stay visible.
Pocket holes: the hobbyist favorite. It needs a dedicated jig, it's very fast, very strong, and the screws hide on the inside face. If you buy one extra tool, make it this one.
Dado joint: a groove cut into the side panel that the shelf slides into. It spreads weight across the whole joint, and it's what furniture that lasts for decades uses. You'll need a router or a dado stack.
A rule that never fails: glue is what holds, screws are what clamp while the glue cures. Never skip the glue.
Square, square, square
If the box isn't square, the doors won't close properly, and no amount of later adjustment fully fixes it.
Check by measuring both diagonals of the rectangle — if they match, it's square. Do this while the assembly is barely fastened and still flexible, and correct by pushing on the long diagonal. Then fasten the back panel: that panel is what locks the carcass square permanently. It isn't decorative, it's structural.
The realistic minimum tool kit
You don't need a full shop:
- Circular saw with a straight edge guide, or a cutting service at the lumber yard
- Drill/driver with pre-drill bits
- Carpenter's square
- Tape measure and pencil
- At least four clamps (there are never enough)
- Orbital sander or a sanding block
A practical tip: many lumber yards will cut panels to size for a small fee, on a panel saw. Their cuts will be more accurate than yours freehand with a circular saw, and they take the hardest part off your plate.
The five first-timer mistakes
- Not pre-drilling. You split the panel right at the edge, and there's no undoing that.
- Forgetting material thickness when calculating interior dimensions. Two 18 mm panels eat 36 mm of usable width.
- Leaving zero clearance on doors. Leave a 2 to 3 mm gap around the perimeter.
- Sanding only at the end. Sand the interior faces before assembly — afterwards you can't reach them.
- Skipping finish on the hidden face. Sealing only one side makes the panel absorb moisture unevenly and cup.
The finish
Sand progressively: 120, then 180, then 220 grit, clearing dust between passes. If you're varnishing, apply thin coats and sand lightly between them. If you're painting, priming MDF first stops the edges from drinking three times as much product as the faces.
When to call a carpenter
A standalone cabinet is a very reasonable weekend project. A full kitchen, a built-in closet that has to adapt to out-of-plumb walls, or anything with precision hinges and drawer slides fitted to irregular dimensions — that's where experience shows and the margin for error is measured in millimeters.
Conclusion
Building your first piece teaches something no tutorial quite conveys: precision accumulates. Every millimeter of error in the cut comes back amplified at assembly. Go slow, measure twice, enjoy it.
Have something more ambitious in mind? Post it on HelpyHub and get proposals from verified carpenters near you.