Most loft bedrooms suit a double bed (135cm by 190cm mattress), and many larger dormer or mansard conversions can take a king size (150cm by 200cm). The deciding factor is not floor area alone but usable headroom: you need enough height to stand up beside the bed and sit up in it comfortably, so measure where the ceiling reaches a comfortable standing height and plan the bed within that zone.
Loft conversions are one of the most common ways UK homeowners add a bedroom, and they often produce some of the most characterful rooms in the house. They also bring awkward angles, low eaves and stairs that arrive in the middle of the floor. Choosing a bed means thinking in three dimensions. Our range of modern beds UK sale includes low profile frames and compact sizes that suit these spaces particularly well.
In an ordinary bedroom, a floor plan tells you almost everything. In a loft, a room that looks generous on paper can feel much smaller once you account for the slope of the roof. Part of the floor sits under ceilings too low to stand beneath, which is fine for a bed or storage but not for walking.
Every piece of furniture has to respect those slopes, which is why it pays to plan the whole room together using our modern bedroom furniture UK collection, choosing heights and depths that suit the roof line rather than fighting it.
It helps to divide a loft bedroom into three areas:
Mark these zones on the floor with masking tape. Then sit on the floor where the bed might go and lift your arms above your head. If your hands touch the ceiling comfortably above where your pillows would be, you will probably be able to sit up in bed without bumping your head.
These conversions keep the original roof shape and add windows into the slope. They offer the least full height floor, so a small double (120cm by 190cm) or a standard double is usually the most comfortable choice. A single bed can work beautifully in a child’s loft room or a study that doubles as a guest space.
A dormer adds a box shaped extension with vertical walls and a flat ceiling. This creates a much larger area of full height, and many dormer bedrooms can comfortably take a double or king size bed. Placing the bed so the headboard sits against the dormer’s vertical wall often works well.
These conversions reshape the roof more significantly, producing a room that feels close to a standard bedroom. A king size bed is often realistic here, and in larger mansard rooms a super king (180cm by 200cm) may fit. Still check the ceiling at the edges, especially if there are dormer windows or chimney breasts.
The most common loft layout puts the headboard against the low wall under the eaves, with the foot of the bed pointing into the room where the ceiling rises. This uses the low space for sleeping, which only requires you to sit up near the pillows, and keeps the full height floor free.
Before committing, check that you can climb in and out of bed without stooping awkwardly. If the slope is steep, you may need to move the bed a little further into the room, leaving a narrow strip behind the headboard for a shelf or low storage.
An alternative is placing the bed lengthways along the slope. This suits narrow lofts but means one side of the bed sits under a low ceiling, so make sure the person sleeping on that side is comfortable with it.
Wherever the bed goes, avoid blocking the top of the stairs or the approach to a window. Building regulations around loft conversions often specify escape routes, so keep windows and stair access clear.
This is easy to overlook. Loft staircases frequently have winders or a tight turn, and a firm pocket sprung mattress may simply not bend round the corner. Rolled or vacuum packed mattresses are much easier to carry up into a loft, since they expand only once unpacked in the room.
Our mattresses UK sale include options that arrive compressed, which can solve this problem entirely. Measure your stair width and the height at the tightest point before ordering any large item.
Lofts rarely have space for a large freestanding wardrobe, because the full height area is limited. Instead, think low. A chest of drawers under the slope keeps clothes accessible without needing headroom. Our modern chest of drawers UK range includes wide, low designs that tuck neatly beneath eaves.
Built in eaves cupboards are another excellent use of the lowest areas, particularly for seasonal clothes, suitcases and spare bedding.
Rooflights bring wonderful daylight but can also let in early morning sun and summer heat. Fitted blackout blinds for each window make a significant difference to sleep quality. In winter, lofts can feel cooler if insulation is limited, so layered bedding and a thick rug are worth considering.
Lighting needs care in a room with sloping ceilings. Pendant lights may hang too low, so wall lights and low table lamps are often more practical. Our article on UK ceiling heights and lighting by property age offers useful context when planning lights for lower ceilings.
Yes, if it leaves you squeezing along the edges of the room or ducking to reach a wardrobe. A bed should leave you with a comfortable route around it, ideally around 60cm on the sides you use. If a king size bed only fits by pushing both sides into low eaves, a double is likely to feel more comfortable day to day.
For a clearer picture of what a larger bed demands, our guide to UK king size bed dimensions and room size sets out the frame, mattress and floor space you need.
Not every loft room needs a double. In a compact conversion used as a child’s bedroom, a study or an occasional guest room, a single bed or daybed can be a smarter choice. A single (90cm by 190cm) leaves far more full height floor free for a desk, a reading chair or play space. Placed lengthways along the low wall, it tucks neatly under the slope and almost disappears into the room’s architecture.
Daybeds are particularly useful in lofts that double as a home office. During the day, they act as a sofa for reading or relaxing. When guests arrive, they become a comfortable bed. Some designs include a trundle underneath, giving you two sleeping spaces without permanently using the floor.
Sloping ceilings are a feature worth celebrating. Painting the walls and ceiling the same soft colour blurs the angles and makes the room feel calm and enveloping. Pale shades keep the space airy, while a deeper colour can make a large loft feel cosy. Keep furniture low and simple, and let the shape of the room provide the drama.
The right bed size for a loft bedroom depends on headroom first and floor area second. Map out where you can stand, sit and only crawl, choose a low frame that suits the slope and check that every part, including the mattress, can make it up the stairs. Done well, a loft bedroom becomes one of the most restful rooms in the house. You can explore beds, mattresses and storage at Furniture in Fashion.
Often, yes, particularly in dormer, hip to gable or mansard conversions with plenty of full height floor. Rooflight conversions usually suit a double better.
It often works well, since you only need sitting height near the pillows. Check you can sit up and get in and out of bed comfortably.
A low profile frame with a low headboard or no headboard gives you the most headroom.
Choose a rolled or vacuum packed mattress, which is far easier to carry round tight turns before it expands.
Enough to sit up comfortably without your head touching the ceiling. Test this by sitting on the floor where the pillows would be.
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