Definition

What Is a Shower Niche?

A shower niche is a recess formed in the wall to hold bottles and soap, so nothing has to sit on the floor or hang from the fittings. It is one of the few bathroom details that is essentially free if planned before the wall is built and effectively impossible afterwards, which is why it belongs on the drawing rather than on the wish list.

The short answer

Quick Reference

A niche is a recess in the wall, not an applied shelf.
It must sit within a stud void or a thickened wall, decided early.
Depth is limited by the wall; 90 to 100 mm is a usable minimum.
The base must fall slightly forward so water drains out.
Waterproofing must be continuous through the recess, not stopped at it.

Horizontal, vertical and multi-tier niche formats compared

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A Recess, Not a Shelf

The distinction matters. A shelf is added to a finished wall and projects into the shower, where it collects water on top, obstructs the space, and creates a junction that has to be sealed forever.

A niche is subtracted from the wall. It occupies space that was inside the wall construction anyway, projects nothing into the shower, and if it is waterproofed and tiled as part of the wall it has no separate seal to fail.

That is the whole argument for one, and it explains the timing constraint: you can only subtract from a wall while it is being built.

Subtracted from the wall rather than added to it
Projects nothing into the shower space
No applied junction to seal separately
Must be formed while the wall is being built
Effectively impossible to add to a finished tiled wall

Formed and Prefabricated Niches

A recessed storage niche in a dark tiled wall

Two construction routes are in common use and they suit different situations.

A formed niche is built on site from board and framing within the wall, then waterproofed and tiled as part of the wall. It can be any size the wall allows, and it can be tiled to match the surrounding wall exactly, which is what most designers want.

A prefabricated niche is a molded unit built into the wall as a single piece and then tiled around. Because the box itself is one waterproof piece with no internal corners to seal, it removes the most failure-prone part of the detail. It comes in fixed sizes and its interior may be a different surface from the wall, which some buyers want and others do not.

For repeat rooms in a hotel or apartment project, the prefabricated route is usually the better one: consistent, faster, and it removes a workmanship variable that would otherwise be repeated across every bathroom.

Formed on site: any size, tiled to match the wall exactly
Prefabricated: one waterproof piece, no internal corners to seal
Prefabricated comes in fixed sizes
For repeat rooms, prefabricated removes a workmanship variable
Solid surface niches can be made to size with no visible joints

Sizing and Positioning

A wide horizontal niche with lit shelves holding bathroom items

Depth is set by the wall. In a standard stud wall the void gives a usable niche around 90 to 100 mm deep, which takes most bottles. Anything deeper requires a thickened wall, a service void, or a chase into masonry, all of which are construction decisions rather than choices.

Height above the floor should suit the person using it, not the tile course. Somewhere around chest height puts bottles within easy reach without bending; a second lower niche or shelf is useful for a foot when shaving legs. In an accessible bathroom the position should be confirmed against the applicable standard, and reachable from a seated position.

Width is a free choice within the stud bay. A long horizontal niche spanning between studs reads as a deliberate architectural line and holds far more than a small square one. A tall vertical niche fits within a single bay and suits narrow walls.

The one instruction that saves an argument later: coordinate the niche with the tile setting-out. A niche whose edges do not align with a grout line looks like an accident, and it is free to prevent on a drawing.

Depth around 90 to 100 mm in a standard stud wall
Position at reachable height, not at a convenient tile course
Long horizontal niches hold more and read better
Confirm reach requirements for accessible bathrooms
Align the niche edges with the tile setting-out

Waterproofing and Drainage

A tall vertical niche with multiple shelves

A niche is a hole in a waterproofed wall, which makes it a potential weak point unless it is treated as part of the waterproofing rather than an interruption to it.

The membrane must run continuously into the recess, across its base, up its back and returning out to the wall face. Internal corners are reinforced. Stopping the membrane at the opening and relying on tile and grout inside the niche is the failure mode, and it is not visible once tiled.

The base needs a slight fall outward so water drains rather than pooling. A perfectly level niche base holds a shallow pool of water permanently, which discolours grout and eventually finds the weakest point.

And avoid placing a niche on an external wall where the recess reduces insulation, or directly opposite the shower head where it takes the full spray.

Membrane runs continuously into and out of the recess
Reinforce every internal corner
Fall the base slightly outward so water drains
Do not stop the waterproofing at the opening
Avoid external walls and the direct spray line