Most bunk beds are built for children who are already six. Low bunks aren't, and that's the whole point of them.
A standard bunk puts the top mattress around 130 to 150cm off the floor. A low bunk brings that down to roughly 90 to 110cm, which changes three things at once: the height of a fall, whether it fits under a sloped ceiling, and whether a four-year-old can get up there without an audience.
Who they're actually for
Rooms with low or sloped ceilings. The rule that matters is that a child should be able to sit up on the top bunk without their head near the ceiling. In a loft conversion or a room with coving, a standard bunk often fails that test and a low bunk doesn't.
Younger siblings sharing. The under-6 guidance for top bunks doesn't change with height, and we'd never suggest otherwise. But a low bunk means the younger child on the bottom isn't sleeping in a cave, and the room feels open rather than dominated by furniture.
Children who move a lot in their sleep. Guard rails work. But if you've got a restless sleeper, less height above the floor is genuinely reassuring, and it's the reason a lot of parents pick one.
Smaller rooms generally. A low bunk sleeps two in the footprint of one single bed, without the visual weight of a full-height frame. In a 2.1m box room that's the difference between a bedroom and a storage unit.
The safety rules don't change
Worth being straight about this, because some retailers imply a low bunk is a way around the age guidance. It isn't.
- The top bunk is still for children aged 6 and over. BS EN 747, the British standard for bunk beds, sets this and it applies regardless of frame height. Younger children can safely use the bottom bunk.
- Guard rails on all sides of the top bunk, fitted and secure.
- Mattress depth matters more on a low bunk, not less. Too deep and the guard rail loses its clearance. Check the maximum depth for your specific bed.
- Nothing hung from the frame. No ropes, bags, skipping ropes or fairy lights.
- Re-tighten the fixings every few months, and after any heavy use.
More detail in our bed safety guidance.
Our low bunk beds
Nyla Cashmere Low Bunk Bed
Our most popular low bunk, and the one we'd point most families at first. Solid pine in a warm Cashmere finish that sits between beige, taupe and soft grey, so it works in a nursery and still looks right when they're ten.
The frame is low enough for smaller rooms without feeling like a compromise, and the finish is painted rather than foil-wrapped, so it can be touched up or repainted later.
Nyla Cashmere Low Bunk Bed — see the full spec →
HoppeKids Shorty Bunk Bed
The one to look at if your room is genuinely tight. Shorty bunks take a 175cm mattress rather than the usual 190cm, which takes 15cm off the length of the whole bed. In a small box room that's often the difference between fitting and not.
Scandinavian design, available in white or natural, with an optional safety rail. HoppeKids build these to last through more than one child.
HoppeKids Shorty Bunk Bed with Drawers
Same frame, with storage drawers built in underneath. If the low bunk is replacing a bed and a chest of drawers, this is the version that does both jobs and leaves you the floor space.
HoppeKids Shorty Bunk Bed with Drawers →
Or browse the full bunk bed collection.
Mattresses: the bit people get wrong
Two things catch people out on any bunk, low or otherwise.
Depth. Most high-street single mattresses are 20cm or deeper. On a bunk that eats into the guard rail clearance and the rail stops doing its job. Our bunk bed mattresses are built at 15cm for exactly this reason.
Size, if you're buying a shorty. A shorty bunk needs a 75 x 175cm mattress, not a standard single. It's an easy mistake to make and an expensive one, so check before you order. We stock shorty mattresses in the right size.
And you'll need two. It sounds obvious, but it's the single most common thing people forget at checkout.
Measuring up
Three measurements before you order anything:
- Ceiling height above where the bed will go. Not the highest point of the room, the point directly above the bed. Allow enough for a child to sit up comfortably on the top bunk.
- Floor space including the ladder. The ladder projection isn't always in the headline dimensions, so check the full spec on the product page.
- Door and stair access. Bunk beds arrive flat-packed in several boxes, but they're long boxes. Worth a thought if you've got a tight turn on the stairs.
If you're not sure, message us. We'd rather spend five minutes checking than have you sent the wrong bed.
Common questions
What age can a child use a low bunk bed?
The bottom bunk suits most ages. The top bunk is for children aged 6 and over, and that applies to low bunks the same as any other. It's set by BS EN 747 and it's based on coordination and night-time awareness rather than height alone.
How low is a low bunk bed?
Typically the top mattress sits around 90 to 110cm from the floor, against 130 to 150cm on a standard bunk. Check the specific dimensions on each product page, since it varies by model.
Will a low bunk fit under a sloped ceiling?
Often yes, where a standard bunk won't. Measure the height directly above where the bed will stand, and make sure a child can sit up on the top bunk without their head near the slope.
What's the difference between a low bunk and a shorty bunk?
A low bunk is lower. A shorty is shorter, taking a 175cm mattress rather than 190cm. Some beds are both. If your problem is ceiling height you want a low bunk; if it's floor length, a shorty.
Can a low bunk be split into two beds?
Some can, some can't. It's listed on each product page. If it matters to you, check before ordering, since it's not a modification we'd recommend making yourself.
What mattress do I need?
Two, both 15cm deep or less. Standard single 90 x 190cm for most low bunks, or 75 x 175cm for a shorty.
