Building under bed storage drawers comes down to one number: the exact floor-to-frame clearance under your bed, because the box, the casters, and a little breathing room all have to fit inside that gap.
Get that measurement wrong and you’ll spend a Saturday building a drawer that scrapes the floor or won’t slide under the frame at all. Get it right and you’ve got a roll-out box that turns dead space into storage for blankets, shoes, or off-season clothes — for the cost of a sheet of plywood, some boards, and four casters.
Here’s the full build order, from the tape measure to the test fit.
How Do You Measure Clearance Under a Bed?
Measure the floor-to-frame height at four or five points along both sides of the bed, then build to the smallest number you find, not the average.
Beds sag, floors slope, and a frame that clears 7 inches at the headboard might clear only 6¼ at the foot. Working from the low point means the drawer rolls the whole length without catching.
- Caster height counts. A 2-inch caster adds 2 inches to your box height. Subtract wheel height from your clearance before you cut anything.
- Leave headroom. Aim for about ½ inch of gap so the drawer doesn’t scrape on an uneven floor.
- Measure width between the bed legs, then check what’s hanging down: slats, center rails, cross beams, and support blocks all eat into usable space.
- Plan for full extension. A drawer pulled all the way out needs handle clearance and room to clear the wall — and it becomes a tripping hazard in a walkway.
Sketch the box before you shop. Width, depth, and height all get locked in by these measurements, and changing them later means recutting every piece.
What Materials and Cut List Do You Need?
A basic drawer is a plywood base with board sides, a front, and a back, plus casters underneath and a handle on the face.
Another build uses a drawer-slide approach with 1/2-inch plywood, 1 x 8 and 1 x 6 boards, and a 3/4-inch plywood floor.
For fasteners, that first guide calls for 1/2 in. to 5/8 in. screws at the casters and 1 1/4 in. screws at the handle, with pre-drilled holes to stop the wood from splitting. The pocket-hole version specifies 1 1/4-inch pocket-hole screws.
Those cut lists are starting points, not gospel. Scale every dimension to the clearance you measured — a 38-inch-wide box won’t fit a twin frame.
| Build Step | What To Do | Watch Out For |
|---|---|---|
| Measure clearance | Check floor-to-frame height at several points; use the smallest | Sloping floors and sagging frames |
| Measure width and obstructions | Width between legs, minus slats, rails, and beams | Center rails and support blocks |
| Cut the base and sides | Plywood bottom, board sides sized to your clearance | Forgetting caster height |
| Assemble the box | Screw sides to the base and to each other | Split ends without pre-drilling |
| Mount casters | 1/2 in. to 5/8 in. screws at each corner | Screws poking through thin stock |
| Add a handle | 1 1/4 in. screws through the front face | Handle adding to overall height |
| Test fit | Roll it under while the build is still adjustable | Rubbing and binding |
How Do You Assemble and Test-Fit the Drawer?
Assemble the box, bolt on the casters, then roll it under the bed before you sand, paint, or stain anything.
Work in this order:
- Pre-drill every caster and handle hole. Thin boards split fast, and a split corner means a wobbly drawer.
- Fasten the sides to the base with screws or pocket-hole joints, keeping the box square by measuring corner to corner.
- Mount the casters at the four corners, inset slightly so they don’t stick past the box edge.
- Attach the handle centered on the front, low enough that it clears the frame when the drawer rolls in.
- Test-fit it under the bed right away.
A the drawer rolls under with a light push, no scraping sound, and the handle clears the bed frame at every point along the pull. If it binds, you still have room to trim the sides or swap in shorter casters.
Load capacity is where DIY and store-bought builds diverge most. Don’t assume your build matches a product rating — the plywood thickness, joint style, and caster quality all decide how much weight it actually holds.
If you’d rather skip the tools and just buy something that fits, our tested bed drawer storage picks cover ready-made options in the same size ranges.
Ready-Made Sizes to Compare Against Your Measurements
Before committing to a build, check what manufacturers actually sell — those dimensions tell you what fits under a typical bed frame.
If your clearance sits under 6 inches, a custom build is usually your only option — off-the-shelf drawers won’t clear the frame. That’s the case for measuring first and shopping second. And keep the wall in mind: a drawer that pulls out into a walkway creates a real trip hazard, so plan the pull direction toward open floor.
FAQs
What’s the minimum clearance needed for a rolling drawer?
Plan on at least 4 to 5 inches of usable height after subtracting caster height. Below that, most casters won’t fit and the box gets too shallow to hold much. Measure at your bed’s lowest point and build to it.
Do I need drawer slides or are casters enough?
Casters handle the weight and rolling for a low, wide box, and they work on any floor. Slides are smoother but need mounting rails that eat into your clearance. For under-bed use, casters are the simpler choice.
How much weight can a DIY under-bed drawer hold?
It depends on your materials and fasteners. Use thicker plywood and pre-drill every hole.
References & Sources
- The Home Depot / Extra Space Storage. “DIY Under-Bed Storage.” Cut list, fastener sizes, and assembly order for a basic rolling drawer.
- IKEA. “Under Bed Storage.” Current retail size ranges for ready-made under-bed drawers.
