Bathroom Cabinet 30 cm Deep: Which Recess Does It Fit & What Goes Inside?

November 30, 2025

A bathroom cabinet with a depth of 30 cm provides ample storage space for folded towels and toiletries without protruding far into the room, making it the ideal solution for narrow bathrooms and tight recesses.

A lack of floor space is a common challenge in many bathrooms. Standard furniture with a depth of 40 cm or 50 cm often obstructs walkways or cannot be positioned next to door frames and showers. A cabinet with an external depth of 30 cm offers a functional middle ground. It makes efficient use of alcoves without appearing bulky.

Dimensions and Usable Interior Space: What Fits Inside?

With a nominal external depth of 30 cm, you must deduct the material thickness of the front and the back panel. Typical bathroom furniture consists of 16 mm thick chipboard or MDF (medium-density fibreboard). After subtracting the front, the back panel, and the necessary clearance for hinges, a usable internal depth of around 26 cm to 27 cm remains.

Much like a neatly packed suitcase, such a cabinet makes use of every available millimetre, but requires deliberate organisation. The following items can be stored without issue:

Towels: A standard bath towel (70 x 140 cm) or regular hand towel (50 x 100 cm) fits folded precisely into a depth of 25 cm.
Toilet paper: A standard roll has a diameter of around 10 cm to 12 cm. You can easily place two rolls one behind the other.
Toiletries: Shampoo bottles, shaving foam, and cosmetic jars require only a few centimetres.
Cleaning products: Standard bottles for bathroom cleaners fit upright with ease.

If space is even more restricted and even 30 cm extends too far into the room, shallower alternatives such as a bathroom cabinet depth 20 cm or a bathroom cabinet depth 25 cm are necessary. These are primarily suitable for smaller cosmetics.

Selection Criteria

Floor-standing or Wall-hung?

Wall-hung cabinets make floor cleaning easier and make the room appear visually larger. Floor-standing models on furniture feet or plinths do not require wall drilling for the primary load, but must still be secured against tipping over.

Doors or Drawers?

A bathroom cabinet with drawers offers the advantage of viewing contents from above. With a depth of 30 cm, drawer runners with a length of 250 mm are typically used. Opt for full-extension runners so that the drawer can be pulled out completely and no items disappear in the rear section. Doors offer greater flexibility for tall items, but require shelves for partitioning.

Material and Surface Finish

High humidity prevails in the bathroom. Ensure that the carcass features a continuous melamine resin coating and that the edges are neatly sealed. Light tones dominate colour schemes to elongate the room. Bathroom cabinets white reflect light well, whilst a bathroom cabinet black provides deliberate contrast in modern tiled bathrooms.

Assembly and Installation: Tips for DIY Enthusiasts

The assembly of a 30 cm deep bathroom cabinet is generally carried out lying on the floor. For self-assembly, you will need the following tools:

Cross-head screwdriver (size PZ 2 or PH 2, depending on the supplied screws)
Cordless screwdriver
Spirit level
Folding rule
Drill and masonry bit (for wall fixing)

Assembly time: Allow approximately 45 to 60 minutes for a typical tall or side unit.

Step-by-step process:

Carcass jointing: The side panels are usually joined to the base and top panels using wooden dowels and cam lock fittings.
Back panel: This is either inserted into a routed groove or nailed onto the rear. It provides the cabinet with the necessary squareness and rigidity.
Hinges: The concealed cup hinges (typically with a 35 mm cup diameter) are inserted into the pre-drilled holes in the door and screwed tight.
Wall mounting: A cabinet with a depth of only 30 cm, especially a tall unit, has an unfavourable centre of gravity. It must be secured to the wall with an anti-tip bracket. For tiled walls, use specialised tile drills without hammer action and suitable wall plugs (e.g. 6 mm or 8 mm).

Typical Solutions and Locations

A cabinet depth of 30 cm can be integrated flexibly into various bathroom layouts.

The recess next to the toilet: Often 30 cm to 40 cm of space remains between the toilet and the wall. A base unit of this depth utilises the dead space for cleaning agents or toilet paper.
Behind the bathroom door: When the opened door leaves a gap to the wall, narrow bathroom cabinets fit perfectly behind it.
As an extension to the vanity unit: Combined with further units of the same depth, a continuous storage run is created. If seeking the same dimensions in a hallway, a chest of drawers depth 30 cm can be used, following the same basic assembly principle.

Frequently Asked Questions (FAQ)

Does a hairdryer fit into a 30 cm deep cabinet?

Yes, a standard hairdryer requires around 20 cm to 25 cm of space when laid flat and fits easily into a cabinet with an external depth of 30 cm.

Do I need to secure a floor-standing bathroom cabinet to the wall?

Yes. Due to the shallow depth of 30 cm and the often greater height, these cabinets tend to tip forward when opening doors or pulling out drawers. Securing them with two screws and wall plugs in the upper area is strictly necessary.

Which hinge is used for the doors?

Concealed cup hinges are used as standard, mostly for a full overlay application where the door rests on the side walls. If the hinge features integrated soft-close damping, the door shuts silently.