Types of kids’ beds explained: bunk, loft, trundle and more

Key takeaways

• Bunk beds are best for siblings sharing a room, while loft and mid-sleeper beds are great when you need floor space for desks, play or storage underneath.
• Trundle beds are ideal for sleepovers or occasional guests, giving you an extra mattress that hides away when not in use.
• High sleepers and top bunks are generally better suited to older children and pre-teens, who can safely manage ladders and guard rails.
• House-style toddler frames, like this junior wooden house bed, can make the transition from cot to bed feel cosy and low to the ground.
• Always check maximum mattress height, weight limits and guard rail design, especially for elevated beds such as bunks, lofts and cabin beds.

UK kids’ bed sizes in a nutshell

Before diving into the different styles, it helps to understand common UK kids’ bed sizes, because almost every type – from bunks to daybeds – is built around these dimensions.

• Cot bed mattress – often around 70 x 140 cm. Used for convertible cots and some specific toddler beds.
• Toddler or junior bed – usually similar to cot bed length (around 140 cm) but in a bed frame style; sometimes slightly longer depending on brand.
• Single bed – 90 x 190 cm. This is the classic UK single and the most common size for bunk beds, loft beds, midsleepers and daybeds.
• Small double – 120 x 190 cm. Less common in children’s designs, but sometimes used for older teens or lower bunks with a single on top.

When comparing kids’ beds, always double-check the mattress size supported by the frame rather than assuming. This affects not only comfort and longevity, but also safety – especially where guard rails and trundles are involved.

Toddler and junior beds

Toddler and junior beds are usually the first step after a cot. They tend to be low to the ground, with partially enclosed sides or guard rails to help prevent tumbles. Many are themed or playful in design, which can make bedtime more inviting for little ones who are unsure about leaving the cot.

Typical age suitability is from around when your child starts climbing out of the cot up to roughly school-start age, depending on their height and confidence. After that, many families move to a standard single bed to avoid buying multiple frames in quick succession.

One example of this style is a simple house-frame bed, such as a junior wooden house bed for toddlers. Designs like this are low, open and easy to accessorise with canopies or fairy lights as your child grows.

Pros and cons of toddler and junior beds

• Pros:
  • Low height reduces the risk of injury if a child rolls out.
  • Guard rails or raised sides add reassurance for parents and children.
  • Smaller footprint than a full single in many cases.
  • Playful designs can make the transition from cot more exciting.
• Cons:
  • Children can outgrow them fairly quickly in length and style.
  • Mattresses can be a different size to standard singles, limiting reuse.
  • Less future-proof than moving straight to a full single bed.

For some families, it is more economical to choose a low single bed with guard rails instead of an in-between toddler frame that will only be used for a short period.

Single beds and daybeds

A standard single bed is the most straightforward option for children once they are ready to leave a cot or toddler bed. It is simple, familiar and long-lasting, and you are not restricted to kids’ designs – many regular single frames are perfectly suitable for older children and teens.

Daybeds are a twist on the single bed. They usually have three sides (back and two arms), so they can be styled like a sofa in the day and used as a bed at night. Some daybeds include an underbed trundle or drawers, making them very space-efficient for guest rooms or playrooms that double as sleeping spaces.

Pros and cons of single beds and daybeds

• Pros:
  • Easy to fit with standard single mattresses and bedding.
  • Works for a wide age range, including teens.
  • Daybeds can double as seating in small rooms or multipurpose spaces.
  • Many options with storage drawers or pull-out trundles.
• Cons:
  • Do not inherently save floor space like bunks or loft beds.
  • Daybed arms and back can be awkward for taller teens if the room is small.
  • Not as exciting to younger children as themed or elevated beds.

Bunk beds

Bunk beds stack two (sometimes more) sleeping spaces vertically to save floor space. They are especially useful for siblings sharing a room or for families who need an extra bed for visiting relatives or frequent sleepovers without giving up play area during the day.

Most bunk beds use standard single mattresses on both top and bottom, though some designs have a small double on the bottom and a single on top. Typical guidance is that the top bunk is suitable for older children who can safely manage ladders and understand not to play up high, while the bottom bunk can be used by younger siblings.

There are also themed bunks for children, such as a castle-style bunk bed with ladder, which adds a sense of play but still functions as a regular two-tier bed.

Pros and cons of bunk beds

• Pros:
  • Perfect for shared rooms where floor space is limited.
  • Top bunk can feel exciting and special to older children.
  • Often can be split into two single beds later, increasing flexibility.
  • Many options include storage or shelves built into the frame.
• Cons:
  • Higher risk of injury if safety guidelines are not followed.
  • Can be tricky to make the top bunk or change bedding.
  • Ceiling height needs to be sufficient to avoid bumped heads.
  • Not ideal for children who move a lot in their sleep or are nervous of heights.

Bunk bed safety watchpoints

• Check that guard rails run along the full length of the top bunk, with only a ladder gap.
• Use the recommended mattress depth on the top bunk so the guard rails are tall enough above the mattress.
• Ensure the ladder is firmly fixed, with non-slip rungs if possible.
• Position the bed away from ceiling fans, lights or windows.
• Teach children that the top bunk is for sleeping, not jumping or games.

For more detail, it is worth reading a dedicated guide on how to choose a safe bunk bed for kids and pre-teens, which explores weight limits, ladder styles and construction quality in depth.

Loft beds and high sleepers

Loft beds (often called high sleepers) raise the mattress high off the floor, leaving clear space underneath for desks, wardrobes, seating or play zones. Unlike bunks, they usually have just one sleeping area at the top. This makes them perfect for older children and teens who want a more grown-up feel and a dedicated study or gaming area inside their bedroom footprint.

Many high sleepers combine multiple functions in one frame – for example, a raised single bed with an integrated desk, shelves and wardrobe below. The Sydney high sleeper cabin bunk bed is an example of a tall frame that uses the space beneath for practical storage and workstation options.

Pros and cons of loft and high sleeper beds

• Pros:
  • Maximises vertical space, freeing up the floor under the bed.
  • Great for fitting in desks for homework or gaming setups.
  • Feels more grown-up for older children and teenagers.
  • Can sometimes be reconfigured as a regular single later.
• Cons:
  • Not suitable for younger children because of ladder and height.
  • Parents may find it harder to reach an ill child at night.
  • Requires good ceiling height and careful room layout.
  • Under-bed space can feel enclosed if the room is very small.

Loft beds vs bunk beds: what is the difference?

At a glance, loft beds and bunk beds can look similar because both raise at least one mattress off the floor and use ladders. The key differences are:

• Number of beds – Bunks usually provide two sleeping spaces (top and bottom), whereas loft beds have a single elevated mattress.
• Under-bed use – In a loft bed, the space underneath is open for desks, storage or seating. In bunks, it is occupied by the lower bed.
• Best use-case – Bunks are best for two sleepers in one room; lofts are better for one sleeper needing storage, study or play space.

If you are still unsure which layout suits your situation, take a look at a detailed comparison of a bunk bed vs loft bed for kids, covering safety and practicality in more depth.

Mid sleeper and cabin beds

Mid sleeper beds (sometimes called midsleepers) sit somewhere between a regular single bed and a full high sleeper in terms of height. The mattress is raised enough to create usable space beneath, but not so high that it feels intimidating for younger children. Cabin beds are a similar concept, often with built-in drawers, shelves or small cupboards under the sleeping platform.

These beds work well for early school-age children who are confident climbing a short ladder or steps. The area underneath can be used for toy storage, a small desk, or left open as a den.

Pros and cons of mid sleeper and cabin beds

• Pros:
  • Good compromise between storage and safety for younger children.
  • Creates valuable under-bed space without the height of a loft bed.
  • Often includes built-in drawers and shelves, reducing the need for extra furniture.
  • Can make tidying toys easier, with everything stored in one zone.
• Cons:
  • Still involves climbing, which may not suit all children.
  • Heavier and bulkier than a standard single bed.
  • Underneath space can be awkward for adults to access.
  • Outgrown earlier than a full-height loft or standard single in some cases.

Trundle beds

Trundle beds feature a second mattress that slides out from under the main bed frame when needed. The extra mattress usually sits on a low platform with wheels or castors, so it can be pulled out easily at bedtime and tucked away out of sight during the day.

Trundles work brilliantly for sleepovers, cousins staying the night or when you want a second bed occasionally but do not have space for a permanent extra frame. They are commonly paired with daybeds or standard singles.

Pros and cons of trundle beds

• Pros:
  • Provides an extra sleeping space without permanently using up floor area.
  • Ideal for sleepovers or occasional guests.
  • Can be tidied away fully when not in use, keeping the room clear.
  • Some models allow the trundle to lift up to the same height as the main bed.
• Cons:
  • Trundle mattresses are often thinner and closer to the floor.
  • Requires enough space beside the bed to pull the trundle out.
  • Not usually suitable as a permanent everyday bed for a larger child or teen.
  • Storage space under the bed is reduced or eliminated.

If you often host sleepovers but do not want the height of a bunk, a single bed with pull-out trundle offers a low, flexible alternative that feels less daunting to younger children.

House beds and themed frames

House beds and themed frames turn the bed itself into part of the play environment. House beds use a simple roof-shaped frame around a low mattress; others might resemble a castle, car, treehouse or gaming setup. These designs are popular with younger children who love imaginative play and can make the bedroom feel like a mini hideaway.

House-style frames are often low to the ground and can be used for toddlers and early school-age children. A wooden house bed for kids can be dressed with canopies, bunting or string lights as your child’s tastes change.

There are also elevated themed beds, such as a castle-inspired bunk bed that combines play features with the practicality of two sleeping spaces.

Pros and cons of house and themed beds

• Pros:
  • Make bedtime feel more fun and inviting for reluctant sleepers.
  • Often low to the ground, especially house beds, which helps with safety for younger children.
  • Can double as a play zone during the day, especially when combined with curtains or tents.
  • Easy to restyle as your child’s interests change, especially with neutral wooden frames.
• Cons:
  • Some designs can be quickly outgrown as tastes change.
  • More intricate shapes may be harder to match with future décor.
  • Play features (such as slides or towers) need extra safety checks and supervision.
  • May not offer as much built-in storage as cabin or loft beds.

Storage-focused kids’ beds

Many kids’ beds now integrate storage to help tackle clutter. Options range from simple drawers under a single bed to full cabin setups with cupboards, shelves and even built-in wardrobes. Storage is especially helpful in small bedrooms where there is limited floor area for separate furniture.

Under-bed drawers are common on single beds, bunks and daybeds. Cabin and mid sleeper beds may include pull-out units, cube shelves or steps that double as storage. High sleepers and loft beds often incorporate larger cupboards and study areas beneath.

If storage is a top priority for your home, you might find it helpful to read more about kids’ beds with storage, which looks in detail at drawer types, access and how to make tidying easier for children.

Which bed types suit which ages?

Every child is different, but it helps to have a rough sense of which styles typically work best for each stage:

• Toddlers and pre-schoolers:
  • Low toddler or junior beds with guard rails.
  • Low house beds or floor beds.
  • Standard single beds with clip-on guard rails.
• Early school age:
  • Standard single beds or daybeds.
  • Mid sleepers and low cabin beds for added storage and den space.
  • Bottom bunk of a bunk bed (with older sibling on top).
• Older children and pre-teens:
  • Full bunk beds (following safety guidance for top bunks).
  • Loft and high sleeper beds with desks or storage underneath.
  • Single beds with trundles for sleepovers and guests.
• Teens:
  • Standard single or small double beds, depending on room size.
  • High sleepers with integrated workspaces for homework and hobbies.
  • Daybeds with trundles for flexible seating and extra sleeping space.

Scenario-based recommendations

Shared room for two children

For siblings sharing a small to medium room, a bunk bed is often the most efficient solution. It frees up the rest of the floor for wardrobes, desks and play. Consider a model that can separate into two singles later, so you can reconfigure as they grow. If height or safety worries you, a mid sleeper paired with a low single can also work well.

Sleepovers and occasional guests

If your main need is extra sleeping space on an occasional basis, a trundle bed under a single or daybed is very practical. The main bed functions as normal through the week, then you simply pull out the trundle when a friend or cousin stays. This avoids permanently committing to the height of a bunk or loft bed.

Very small or box room

In a tight room, look for a mid sleeper or loft bed with built-in storage, or a simple single bed with generous under-bed drawers. High sleepers like the Sydney loft-style cabin bed can allow you to tuck a desk and shelves underneath instead of squeezing separate pieces of furniture into limited floor space.

Bedroom where storage matters most

For families battling clutter, a cabin or mid sleeper with integrated drawers and cupboards can be transformative, consolidating toys, books and clothes under the sleeping area. You can explore more space-saving options in a dedicated guide to the best kids’ beds for small bedrooms and shared spaces, which looks closely at layout and clever storage use.