For most multi use spare rooms, a standard single bunk bed is the right size. UK single bunks take a 90 x 190 cm mattress on each level and need a floor area of roughly one metre by two metres, which leaves room for a desk, a wardrobe or a sofa bed alongside. Choose a small single or shorty bunk only if the room is very tight and the beds are mainly for children. Choose a triple sleeper with a small double below if adults will often stay.
The right answer depends on who sleeps there and what else the room has to do. A spare room that doubles as a home office has different needs from one that becomes a playroom between visits. Our range of modern bunk beds UK covers each of these sizes, so it helps to work out the room’s priorities first.
The most common option. Each level holds a UK single mattress of 90 x 190 cm. The overall frame is usually a little larger than the mattress, so allow for the posts and ladder when measuring. Standard single bunks suit children, teenagers and most adults for occasional stays.
Small single bunks use a narrower mattress, often 75 cm wide, while shorty designs are shorter in length as well. They are useful in box rooms and for younger children, but older teenagers and adults will usually find them cramped. Mattresses for these sizes can also be harder to replace, so check availability before committing.
A triple sleeper places a single bunk above a small double or double bed. This is the most flexible choice for a spare room that hosts couples as well as children. The trade off is a larger footprint and a heavier frame, so make sure the room can take it without losing its other uses.
These arrange the beds at right angles or slightly staggered. They take more floor space than a straight stack but often leave a useful corner for a desk or storage beneath the top bed. They suit rectangular spare rooms with a free corner.
A multi use spare room rarely has one job. Before choosing a size, list the roles it plays across a typical year. For many UK households, that looks something like this:
If the room is used most often as an office, keep the bunk compact and push it to the wall furthest from the window so the desk gets the natural light. If it mostly hosts guests, comfort comes first and a larger lower bed makes sense. Planning the whole room as a set of zones also makes it easier to choose matching pieces from our modern bedroom furniture UK sale collection.
Measure the full length and width of the room, then mark out the bunk footprint with masking tape. Add space for the ladder, which may sit at the end or on the long side, and allow a clear walkway of at least around 60 cm alongside the bed so people can make it up and get in and out comfortably.
This is where many plans come unstuck. The person on the top bunk needs to be able to sit up without hitting the ceiling. Measure from the floor to the ceiling, subtract the height of the top mattress surface, and check that a seated adult or older child would have space. Ceilings in older terraces, new builds and loft conversions vary considerably.
Note where the door swings, where radiators sit and how the window opens. A top bunk should not sit directly beside an opening window, and a ladder should not block the door. Moving furniture around on paper first saves a lot of heavy lifting later.
A spare room that doubles as an office works best when the desk area feels separate from the sleeping area. Position the desk facing a window or a blank wall rather than the bunk, so you are not staring at beds during the working day. A compact desk with built in drawers keeps paperwork tidy when guests arrive.
Our modern computer desks UK include slim and corner designs that sit comfortably in a room with a standard single bunk. A chair that tucks fully under the desk is worth prioritising, as it frees up the walkway when the bunks are in use.
Guests remember small comforts more than large gestures. When the bunk is in use, the room should feel like a bedroom rather than an office with beds in it. A few practical touches help:
A slim wardrobe makes a significant difference to how welcome guests feel. Our modern wardrobes UK range includes narrow single and double door designs suited to spare rooms. For more ideas, our guide to wardrobe ideas for a UK guest bedroom looks at layouts that keep hosting simple.
If the spare room mainly hosts children, a standard single bunk is usually the most practical. It lasts through the years as children grow, and the mattresses are easy to find. Top bunks are generally recommended for children aged six and over, so plan for younger visitors to use the lower bed.
For adults, choose a frame designed for adult use with a higher weight limit, and consider a triple sleeper so couples can share the lower bed. Look for a ladder with wide, comfortable treads rather than narrow round rungs.
Most spare rooms host a mix. In that case, a standard single bunk with a pull out trundle underneath offers a third sleeping space without increasing the footprint. Alternatively, a bunk that can be split into two single beds gives you flexibility if the room’s use changes.
The more uses a room has, the more storage it needs. Under bed drawers on the lower bunk keep spare bedding close at hand. A bookcase can hold office files on the lower shelves and guest towels higher up. Baskets on open shelving can be switched between roles as the room changes from office to bedroom and back again.
Avoid filling the floor with freestanding boxes. Every item on the floor reduces the room’s flexibility, and in a multi use room that flexibility is the whole point.
Every home is different, but a few patterns come up again and again in UK spare rooms. Use these as a starting point, then check against your own measurements.
Whatever the room, leave a little breathing space. A spare room that is filled to the edges will feel smaller to guests and harder to use day to day.
For most multi use spare rooms, a standard single bunk gives the best balance of comfort, footprint and long term usefulness. Move to a triple sleeper if couples stay regularly, or to a small single only if space is genuinely tight. Measure the floor and ceiling carefully, plan a clear zone for each use, and add storage that can adapt. You can explore bunk beds, desks and wardrobes for spare rooms at Furniture in Fashion, with free delivery to most UK mainland postcodes.
Most UK bunk beds take a standard single mattress of 90 x 190 cm on each level. The frame itself will be slightly larger, so always check the overall dimensions.
Usually, yes. A standard single bunk needs roughly the same floor space as a single bed, so it often fits better than two separate beds. Check the ceiling height carefully.
It is worth considering if couples stay often. The small double or double base gives adults a shared bed, while the top bunk adds an extra space for a child or single guest.
Yes. Position the desk away from the bunk, ideally near the window, and choose a compact design with storage so the room switches easily between work and guests.
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