Build a Wooden Storage Ottoman with a Hinged Plywood Lid

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This wooden storage ottoman is a useful weekend project for a living room, bedroom, or entryway. It provides enclosed storage without the wobble and thin walls common in bargain furniture. The design below makes a finished ottoman about 36 inches long, 18 inches wide, and 18 inches high, including the lid and feet. Adjust the length if you need a smaller piece, but keep the width and height comfortable for sitting.

Materials and tools

Use 3/4-inch plywood for the box. It is stiff enough for a seat and holds screws better than 1/2-inch stock. A 1/2-inch plywood lid keeps weight down, but a 3/4-inch lid feels more solid and is the better choice if adults will sit on it regularly.

You will also need wood glue, 1 1/4-inch screws, 1-inch screws for the hinges, sandpaper, a drill, a countersink bit, a square, clamps, and a circular saw or table saw. A pocket-hole jig kit is optional, not essential. Butt joints reinforced with screws work well if the parts are square and the screw holes are predrilled.

Cut list and sizing

For the finished dimensions above, cut these parts from 3/4-inch plywood:

• Front: 36 by 17 1/4 inches
• Back: 36 by 17 1/4 inches
• Sides: two pieces, 16 1/2 by 17 1/4 inches
• Bottom: 34 1/2 by 16 1/2 inches
• Lid: 36 by 18 inches

The side panels fit between the front and back, while the bottom fits inside the four walls. This creates a box with an outside footprint of 36 by 18 inches. The bottom sits 1 1/2 inches above the lower edge, leaving room for the feet and making the box less likely to wick moisture from the floor.

If you plan to upholster the lid, cut it to the listed size before adding foam. A 2-inch-thick medium-density upholstery foam and fabric wrapping will add roughly 2 1/2 inches to the overall height.

Build the storage box

Start by marking the inside face of each panel. Dry-fit the front, back, and sides on a flat surface. Check that the corners form true 90-degree angles. Small errors compound quickly, and a crooked box will make the lid bind.

Apply glue to the mating edges, clamp the sides between the front and back, and drive 1 1/4-inch screws every 8 to 10 inches. Predrill and countersink every hole. Plywood splits easily near an edge, especially with coarse-thread screws. Keep the screws at least 3/8 inch from the panel edges.

Measure diagonally from corner to corner. Adjust the clamps until both diagonal measurements are within 1/8 inch. Then install the bottom from underneath. Apply glue to the lower edges, position the bottom 1 1/2 inches up from the floor, and drive screws around the perimeter.

Add four corner cleats inside the box if the bottom feels flexible. Use 1-by-2-inch scraps, cut to about 12 inches, and glue and screw them against the bottom and side panels. This is inexpensive insurance for heavy blankets, books, or toys.

Prepare the lid and hinges

Sand the lid edges and test it on the box. Aim for a small, even gap—about 1/16 inch—around the lid. If the lid is tight, trim the offending edge before installing the hinges. Do not rely on hinge adjustment to correct a badly sized lid.

For a plain wood lid, ease the top edges with sandpaper or a small round-over bit. If you want a padded seat, use 2-inch upholstery foam and durable upholstery fabric. Wrap the foam and fabric around the lid, pull the fabric evenly, and staple it underneath. Keep staples at least 1 inch from the lid edges so the hinge screws have solid wood to bite into.

Position the hinges along the back edge with the lid open. Two 2-inch hinges are adequate for a lightly used lid. A 36-inch piano hinge spreads the load and keeps a long lid aligned, but it is more visible and takes longer to install. Use a third hinge if the lid flexes or the ottoman will see daily heavy use.

Mark screw holes, drill shallow pilot holes, and install the hinges with screws short enough not to come through the lid. Open and close the lid several times. If it shifts sideways, loosen the screws, square the lid against the box, and retighten.

Add feet and finish

Attach four feet near the corners, inset about 2 inches from each edge. Wood blocks are the cheapest option and are fine on carpet. On hard floors, use rubber or felt-bottom furniture feet to prevent scratches. Check that all four feet touch the floor; a rocking ottoman usually means one foot is slightly out of position.

Fill screw holes with wood filler if you will paint. Sand the box through 120 and then 180 grit. Plywood edges absorb finish quickly, so brush on a thin coat of sanding sealer or diluted wood glue before painting. For a clear finish, use two or three coats of water-based polyurethane, sanding lightly between coats.

Paint is the practical choice when the plywood face has visible patches or mismatched grain. Clear finish is worthwhile only when you bought attractive hardwood plywood and are willing to spend more time preparing the edges. For a high-traffic ottoman, upholstery is more forgiving than a dark painted surface, which shows dents and scuffs quickly.

Safety and seasonal timing

Wear eye protection when cutting and drilling plywood, and use dust collection or a respirator rated for fine dust while sanding. Build in spring or fall if you can work in a ventilated garage with moderate humidity. Very damp conditions can swell plywood edges, while cold temperatures slow glue and finish curing. Let the completed ottoman sit indoors for at least 24 hours before loading the storage compartment.

Do not treat the lid as a child-safe toy chest. Hinged lids can trap fingers, and a heavy upholstered lid can fall unexpectedly. If children will use the ottoman, add a lid stay or a slow-close hinge, and avoid storing items that encourage climbing. A soft-close lid support costs more than a basic hinge but is a sensible upgrade for a family room.