Tall Bathroom Units: Slim Tallboys for Practical Bathroom Storage

A tall bathroom unit is one of the most efficient ways to add storage without taking up much floor space.

Bathrooms often have narrow gaps that are difficult to use. The space beside a toilet, the wall between a basin and a doorframe, or a slim alcove may be too small for a standard cabinet, but ideal for a tallboy. By building storage upwards rather than outwards, a tall unit can give you room for towels, toiletries, cleaning products and spare supplies in a compact footprint.

Whether you are planning a family bathroom, ensuite or cloakroom, a tall bathroom unit can help make the room feel more organised and complete.

What Is a Tall Bathroom Unit?

A tall bathroom unit, also known as a tallboy, is a tall, narrow storage cabinet designed for bathrooms.

Most tall units are around 1600mm to 2000mm high and usually between 300mm and 600mm wide. The slim shape means they can fit into spaces where wider cabinets may not work, while still providing useful storage through stacked shelves.

Tall bathroom units can be freestanding or wall-hung, depending on the style and installation requirements. They are available in modern, traditional, mirrored and combination designs, with finishes that can match vanity units, mirror cabinets and wider bathroom furniture sets.

Why Choose a Tall Bathroom Unit?

A tall unit helps you make better use of vertical space.

Instead of adding a wide cabinet that takes up valuable floor area, a tallboy uses the height of the wall. This makes it a good choice for smaller bathrooms, narrow gaps and family bathrooms where storage needs are higher.

A tall unit can also stop your vanity from becoming overcrowded. Daily items can stay in the vanity or mirror cabinet, while the tall unit can hold towels, cleaning products, spare toilet rolls, laundry items and bulk toiletries.

Slim Tall Units for Narrow Spaces

The main advantage of a tallboy is its narrow footprint. Even a slim unit can provide a surprising amount of storage because the space is stacked vertically.

300mm Tall Bathroom Units

A 300mm tall unit is one of the narrowest practical options for bathroom storage.

It can work well in tight spaces, such as beside a toilet, in a narrow alcove or between a basin and a wall. It is also useful in cloakrooms and compact ensuites where every centimetre matters.

Although the shelves will be slim, a 300mm unit can still hold small towels, spare toiletries, toilet rolls and cleaning products.

400mm Tall Bathroom Units

A 400mm tall unit is a popular choice for many bathrooms.

It offers more usable shelf space while still keeping the footprint compact. This size can work well in small family bathrooms, ensuites and rooms where you need extra storage without making the layout feel crowded.

A 400mm tallboy can often hold folded towels, larger toiletries and bathroom cleaning products comfortably.

500mm Tall Bathroom Units

A 500mm tall unit gives you more generous storage and is a good choice for family bathrooms.

The wider shelves make it easier to store bulkier items such as hairdryers, larger bottles, folded towels and spare supplies. If you have the wall space, increasing from 300mm or 400mm to 500mm can make a noticeable difference to storage capacity.

600mm and Wider Tall Units

Tall units of 600mm or more are best suited to larger bathrooms with enough wall space.

At this size, the unit starts to feel more like a full storage cabinet than a slim tallboy. This can be a good choice if you have a spacious family bathroom or master bathroom and need substantial storage.

Freestanding vs Wall-Hung Tall Units

Tall bathroom units are available in freestanding and wall-hung designs.

Freestanding Tall Units

A freestanding tall unit sits on the floor and is often the simpler option to install.

Because the weight is supported by the floor, it may be suitable for a wider range of wall types. However, tall furniture should still be secured to the wall for safety and stability, especially when the doors are open or the shelves are loaded.

Freestanding tall units can suit both modern and traditional bathrooms, depending on the finish and door style.

Wall-Hung Tall Units

A wall-hung tall unit is fixed to the wall and raised off the floor.

This creates a cleaner, more open look and can make the bathroom easier to clean. It is especially useful in modern bathrooms, ensuites and compact rooms where keeping the floor visible helps the space feel larger.

Wall-hung units need a suitable wall and correct fixings, as the wall must support the loaded weight of the furniture.

Mirrored Tall Bathroom Units

Some tall bathroom units include a mirrored door.

This can be useful if you want extra storage and a full-length or longer mirror in the same piece. A mirrored tall unit can work well in ensuites, dressing areas or bathrooms where there is no separate space for a full-length mirror.

The mirrored front can also help reflect light, which may make the bathroom feel brighter.

Combination Tall Units

Combination tall units include a mix of enclosed storage and open shelving.

The enclosed sections are useful for cleaning products, spare toiletries and items you want hidden away. Open shelves can be used for folded towels, decorative items, baskets or products you want to keep within easy reach.

This type of unit can work well if you want storage that feels practical but not completely closed off.

Adjustable Shelving

Adjustable shelves are worth looking for when choosing a tall bathroom unit.

They allow you to change the internal layout depending on what you need to store. You can create taller sections for bottles, smaller shelves for toiletries or more even spacing for folded towels.

This flexibility makes the unit more useful over time, especially in family bathrooms where storage needs can change.

Using a Tall Unit in a Matching Bathroom Set

A tall unit is often the third key piece in a coordinated bathroom furniture set.

The vanity unit provides basin storage for everyday products. The mirror cabinet adds hidden storage above the basin. The tall unit takes care of larger or less frequently used items, such as towels, spare toilet rolls, cleaning supplies and bulk toiletries.

Choosing all three pieces from the same range can help the bathroom feel more planned. It also helps ensure the finishes, handles and proportions work together.

If you are building your own set, start with the vanity unit, pair it with a matching mirror cabinet, then add a tall unit in the same finish where the room allows.

Where to Place a Tall Bathroom Unit

A tall unit does not always need to sit next to the vanity.

In many bathrooms, it works better on a separate wall, in an alcove or beside the toilet. The best position is usually the one that gives you storage without blocking movement around the room.

Before buying, check the width of the available wall, the depth of the unit and the direction the door opens. Make sure it will not clash with the basin, toilet, radiator, shower screen or bathroom door.

Will a Tall Unit Fit in a Small Bathroom?

Yes, a tall unit can work well in a small bathroom if you choose the right size.

A slim 300mm or 400mm unit can add useful storage without taking up much floor space. Wall-hung designs can also help the room feel lighter by keeping the floor visible.

The key is to measure carefully and avoid choosing a unit that is too deep, too wide or awkward to open once installed.

Tall Bathroom Unit FAQs

What is a tallboy?

A tallboy is a tall, narrow bathroom storage unit. It is designed to provide vertical storage for towels, toiletries, cleaning products and spare supplies while using a relatively small amount of floor space.

How narrow can a tall bathroom unit be?

Slim tall bathroom units often start at around 300mm wide. This size can fit into narrow gaps, alcoves and spaces beside toilets or basins where standard cabinets may not work.

Are tall bathroom units freestanding or wall-hung?

Both options are available. Freestanding tall units sit on the floor and are often easier to install. Wall-hung tall units are fixed to the wall and raised off the floor, creating a more modern look and making the floor easier to clean.

How much can a tall bathroom unit store?

This depends on the width, height and internal shelving. A 400mm tall unit can usually hold folded towels, spare toiletries, cleaning products and toilet rolls. A 500mm or wider unit will offer more generous storage for bulkier items.

Will a tall unit fit between my basin and the wall?

It may do, especially if you choose a slim 300mm unit. Measure the gap carefully and check the unit depth and door opening direction before ordering. Make sure the unit will not block the basin, door swing or walkway.

Do tall bathroom units need to be fixed to the wall?

Yes, most tall units should be secured to the wall for safety and stability, even if they are freestanding. Always follow the product installation instructions and use suitable fixings for your wall type.

Find the Right Tall Bathroom Unit at Plumbworld

A tall bathroom unit is a smart way to add storage without using too much floor space.

Choose a slim tallboy for a narrow gap, a wider unit for a family bathroom, or a mirrored or combination design if you want extra features. For a coordinated look, pair your tall unit with a vanity unit and mirror cabinet from the same range.

Browse Plumbworld’s range of tall bathroom units, bathroom storage units, vanity units and bathroom furniture sets to find the right storage for your space.