What's inside
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A small outdoor tool cabinet is a useful spring project: it keeps hand tools close to the garden, off the ground, and out of the rain. This version is sized for a few trowels, pruners, gloves, and small pots. It has a sloped roof, a single door, and a simple wall-mounted cleat. Plan on a weekend, including paint or finish drying time.
Contents
Size and design
The finished cabinet is about 24 inches wide, 12 inches deep, and 30 inches tall, excluding the roof overhang. That’s enough for everyday garden tools without taking up much wall space. Keep the depth modest: a deep cabinet is harder to reach into and puts more leverage on its wall fasteners.
This plan assumes the cabinet will hang on a sturdy fence, shed wall, or masonry surface. Don’t attach it to a flimsy fence board or thin siding alone. If you can’t confirm what’s behind the mounting surface, build a freestanding version on short legs instead.
Materials and tools
Use exterior-rated plywood for the sides, back, and door, and rot-resistant solid wood for the face frame and roof trim. Half-inch plywood is adequate for this small cabinet; three-quarter-inch stock is sturdier but heavier. For exposed parts, cedar is light and easy to work, while treated lumber is inexpensive but can be wet, rough, or prone to twisting. Let treated boards dry before painting, and wear gloves when handling them.
You’ll need a circular saw or table saw, drill/driver, square, tape measure, clamps, and a sander. A box of exterior-rated screws is worth buying for the cabinet; ordinary interior screws can rust or fail outdoors. A basic circular saw is fine if you guide it with a straightedge. A table saw speeds up repeat cuts but isn’t necessary.
| Choice | Cost and effort | Best for |
|---|---|---|
| Half-inch exterior plywood | Lower weight; needs careful edge sealing | A small cabinet on a sound wall |
| Three-quarter-inch exterior plywood | Heavier and usually pricier; more rigid | A cabinet that may hold heavier supplies |
| Cedar frame parts | Costs more; naturally weather resistant | Exposed trim and a lighter build |
| Dry, treated frame parts | Often cheaper; can be rough or move as they dry | A budget build where appearance is secondary |
Cut list
Cut two sides at 12 by 30 inches, one top at 24 by 12 inches, one bottom at 23 by 12 inches, and one back at 24 by 30 inches. These dimensions assume the top and bottom fit between the sides. Cut the door at about 22½ by 27 inches, then trim it to leave roughly a ⅛-inch gap on each side and at the top and bottom. Measure your assembled opening before cutting the door; plywood thickness and saw accuracy can change the final fit.
For the roof, cut a panel about 27 by 15 inches. The overhang helps shield the door, but it won’t make the cabinet waterproof. Add two narrow strips beneath the roof as supports, with the back edge slightly higher than the front to encourage water to run off.
Assemble the box
Sand the cut edges and dry-fit the pieces. Fasten the sides to the top and bottom with exterior screws, predrilling near plywood edges to reduce splitting. Use at least two screws at each joint and check the box for square by measuring both diagonals. If the diagonal measurements differ by more than ⅛ inch, clamp the longer diagonal until they match before installing the back.
Attach the back with screws spaced about 6 inches apart around the perimeter. It acts as a brace, so don’t skip it or use only a few fasteners. Seal exposed plywood edges with exterior primer or a suitable edge sealer. Unsealed edges are a common failure point: they absorb water, swell, and eventually pull apart the veneer layers.
Fit the door and roof
Mount the door with two exterior hinges along one side. Hold it in place with shims to preserve the gap, then mark and predrill the hinge screw holes. If the door binds, don’t force it shut; check the cabinet for square and plane or sand the tight edge. A small hasp or latch keeps wind from swinging it open. A magnetic catch is convenient, but it may not hold in gusty weather.
Fasten the roof supports to the cabinet, then screw the roof panel down. Put a bead of exterior sealant where the roof meets the back, but leave the lower front edge open so moisture can escape. Covering every seam without ventilation can trap condensation inside. For a cleaner finish, add a thin drip edge at the roof’s front.
Finish and mount
Apply two coats of exterior paint or solid-color stain, following the label’s temperature and drying instructions. A wood exterior primer helps paint adhere, especially on plywood edges. If the cabinet is under a deep porch roof, a less expensive exterior paint can be sufficient; direct rain and sun call for careful priming and periodic touch-ups. Don’t paint damp lumber or close the door until the finish has cured enough not to stick.
For a wall mount, fasten a ¾-inch-thick cleat across the cabinet back, with its upper edge cut at a 45-degree angle, and screw the matching cleat into the wall with the bevel facing the opposite way. Use fasteners suited to the wall material, and hit studs or masonry rather than relying on siding. Two people should lift the cabinet into place. Add a lower screw through the cabinet back into a stud or solid backing to prevent it from being lifted off the cleat.
Before loading it, tug firmly on the cabinet and inspect the fasteners. Keep heavy items low, leave a small gap between tools and the floor, and check the finish and mounting screws after the first wet season. Recoat worn spots before bare wood stays exposed.