What's inside
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A wooden bedside caddy is a small project with a useful payoff: it holds a phone, book, glasses, water bottle, and charging cable without taking up floor space. The caddy hooks over the side of a mattress, so it works in a guest room, dorm, bunk, or a bed with no nightstand. It is also a practical beginner project for a winter workshop day because the parts are small and most cuts can be made with basic tools.
Contents
1. Plan the Caddy Around Your Mattress
Measure the mattress before cutting anything. You need the mattress thickness, the amount of overhang you want on the outside, and the height of the inner support board. A good starting size is a 12-inch-wide platform, 16 inches long, with a 5-inch inside drop and a 5-inch outside drop. This gives enough room for a book and phone while keeping the caddy reasonably compact.
For a mattress 10 to 14 inches thick, make the inner support board 1 to 2 inches shorter than the mattress thickness. That allows the caddy to sit securely without lifting the mattress. If the mattress is 12 inches thick, use an inner support about 10 1/2 to 11 inches long from the platform down to the lower edge. The outer support can be shorter because it only prevents the platform from tipping inward.
| Material | Advantages | Trade-offs |
|---|---|---|
| 3/4-inch plywood | Stable, inexpensive, easy to paint | Exposed edges need sanding or edge banding |
| 1/2-inch plywood | Lighter and adequate for small loads | Can flex if the caddy is wide or heavily loaded |
| Solid pine or poplar | Easy to shape and gives a furniture-like edge | Can cup or dent more easily than plywood |
For most builds, 3/4-inch plywood is the sensible choice. The cheaper 1/2-inch option is fine for a phone, glasses, and a paperback, but use 3/4-inch material if you expect someone to place a full water bottle or tablet in it.
2. Gather Materials and Tools
You will need one piece of 3/4-inch plywood or solid wood, approximately 12 by 36 inches, plus wood glue, screws, sandpaper, and a finish. Add thin felt or rubber pads where the caddy touches the mattress or bed frame. A woodworking felt pads search is useful for finding adhesive-backed protection.
Basic tools are a tape measure, square, pencil, saw, drill, countersink bit, clamps, and a random-orbit sander or sanding block. A circular saw with a straightedge makes accurate cuts, but a jigsaw also works if you cut slowly and clean up the edges afterward. Use 1 1/4-inch screws for 3/4-inch stock. Longer screws can poke through the opposite face.
3. Cut the Three Main Parts
Cut the following pieces as a starting point:
- Platform: 12 by 16 inches
- Inner support: 12 inches wide by 11 inches long for a 12-inch mattress
- Outer support: 12 inches wide by 5 inches long
The supports run across the width of the platform, with the inner support underneath near the mattress side and the outer support underneath near the outside edge. Leave about 1 inch of platform extending beyond the outer support. Round the two exposed front corners with a cup or small can, then cut the curves with a jigsaw if desired. This reduces sharp corners beside the sleeper.
4. Dry-Fit Before Drilling
Place the platform across the mattress and hold both supports underneath it. Check that the inner support reaches down beside the mattress without pressing hard into the bed frame. There should be no large gap that lets the platform rock. If the mattress is soft, test with the bedding installed; a thick quilt can change the fit by an inch or more.
The most common failure is making the inside drop too long. It can catch on the bed frame when someone sits down or make the caddy tilt upward. Trim the support before assembly if necessary. Another failure is an outer support that is too short to balance the load. If the caddy tips toward the room when loaded, increase the outer support to 6 or 7 inches or move it closer to the outside edge.
5. Assemble the Caddy
Mark the support locations on the underside of the platform. Keep the inner support about 1 inch in from the mattress-side edge and place the outer support 1 inch in from the opposite edge. Apply a thin layer of glue, clamp each support in place, and drill pilot holes before driving screws from the top of the platform.
Use two screws near each end of each support, keeping them at least 3/8 inch from the edges. Countersink the heads so they sit just below the surface. Wipe away squeezed-out glue immediately; dried glue is harder to remove after sanding and can leave visible finish defects.
If you are using 1/2-inch plywood, add a narrow hardwood cleat beneath the platform along the front edge. It acts as a stiffener and gives the screws more material to hold. Do not rely on glue alone at the support joints, especially if the caddy will carry a drink.
6. Sand, Protect, and Finish
Sand all faces with 120-grit paper, then finish with 180 grit. Ease every corner and edge, particularly the edges nearest the sleeper. A fine-grit wood sanding block is enough for this small project.
Paint is the easiest finish for plywood and hides mismatched edges. Clear water-based polyurethane keeps the wood visible and dries faster indoors than many oil-based finishes. Apply two or three thin coats, sanding lightly between coats. Let the finish cure fully before placing it on bedding; “dry to the touch” does not always mean it will not transfer odor or stick to fabric.
Stick felt or rubber pads to the underside of the platform and the faces of both supports. These pads reduce slipping and prevent scratches, but they are not a substitute for a correctly sized caddy. Replace them if they compress enough to create a loose fit.
7. Test the Load Safely
Before using the caddy overnight, load it on the mattress with a book, phone, charging cable, and a water bottle. Start with about 5 pounds and check whether the platform stays level. Then push gently against the outer edge. It should not slide, twist, or lift the mattress.
Keep liquids in a sealed bottle rather than an open mug. Do not place heavy laptops, cast-iron bottles, or anything that could fall onto a sleeping person unless the caddy is reinforced and independently tested. If you need more storage, add a shallow raised rail along the outer and side edges, but leave the mattress-side edge open so bedding does not catch on it.
For a cleaner cable setup, drill a 1-inch hole near the outside rear corner and soften its edge with sandpaper. A 1-inch wood desk cable grommet can protect the cable and give the opening a finished look. Keep the hole away from the supports and confirm that the charger lead can reach without tension.