A recessed niche and a built-in bench are two of the most requested details in a custom shower — they add real storage and comfort without eating into floor space — and they're also two of the most common places a poorly built shower actually leaks. Both features cut into the wall or floor plane, which means the continuous waterproofing membrane has to wrap around an inside or outside corner rather than run flat, and that transition is exactly where installer skill matters most.
None of this is a reason to skip a niche or bench. It's a reason to make sure whoever is building your shower treats these details as part of the waterproofing plan from the start, not an afterthought framed in after the walls are already up.
Single recessed niche
One rectangular recess built into a wall stud bay, typically sized to hold shampoo and soap without protruding into the shower's usable space. It's the most common configuration and works in almost any shower layout, including tighter showers where a shelf would eat into standing room.
Double or stacked niches
Two niches — side by side or stacked vertically — give more storage separation, useful for a shared shower or a household that wants to keep products organized. Stacking adds a second horizontal shelf line that has to align cleanly with the tile pattern, which is more of a layout planning task than a structural one.
Corner niche
Built into a corner rather than a flat wall run, a corner niche can fit into a tighter shower footprint where there isn't a full stud bay available on a straight wall. It adds an additional inside-corner transition for the waterproofing membrane to wrap, which a skilled installer handles the same way as any other corner detail.
Built-in bench (full-width)
A full-width bench spanning one wall of the shower, usually 17 to 19 inches high per accessible-design guidance, whether or not accessibility is the primary reason for including it. It's the most comfortable option for shaving, sitting during a shower, or simply resting a foot, and it works well in a larger shower footprint.
Corner seat
A smaller triangular or angled seat built into a corner, which uses less of the shower's floor footprint than a full bench — a practical choice in a smaller shower where floor space is at a premium.
Fold-down (teak or hinged) seat
A wall-mounted, fold-down seat that tucks away when not in use, avoiding a permanent built-in structure entirely. It's a lower-cost, lower-waterproofing-complexity option, though it doesn't offer the same solid, built-in feel as a tiled bench.
Every corner a niche or bench creates — inside corners where the recess meets the flat wall, and outside corners where a bench's front face meets its top — is a place where the waterproofing membrane has to change direction while staying continuous. On a flat wall, the membrane simply runs across a plane. At these transitions, it has to wrap the corner as one unbroken layer, which is a harder detail to execute well and much harder to fix after tile is set.
The niche's own construction matters too: a factory-built, pre-formed niche insert with an integrated sloped shelf (so water inside the niche drains out rather than pooling) removes some of the field-built risk compared to a niche framed and waterproofed entirely on site. Either approach can be built correctly — what matters is that the corners get the same membrane treatment and cure time as the rest of the shower, not a shortcut because they're smaller.
A bench's top surface also needs to be sloped slightly toward the shower floor, the same way the floor itself slopes to the drain, so water doesn't sit on the seat between uses.
Niche height and placement should sit within comfortable reach without interrupting the tile pattern awkwardly — we typically plan niches during the framing and tile layout stage together, since moving a niche after tile is set means redoing the wall. A niche's depth is limited by the stud bay (usually about 3.5 inches for a standard 2x4 wall) unless the wall is furred out to create more depth.
Bench depth needs enough room for comfortable seating — typically 12 or more inches — without crowding the shower's usable standing area, so bench placement is really a floor-plan decision as much as a wall decision. In a smaller shower, this is often the deciding factor between a full bench and a corner seat.