What Is a Bathroom Wall Niche? | Built-In Shower Storage

A bathroom wall niche is a recessed shelf built into the wall, most commonly in a shower, that stores toiletries while keeping the wall surface flush.

For the full breakdown, see our best Bathroom Wall Niche guide.

If you’ve ever envied a shower that has a tidy spot for shampoo and soap without bulky corner caddies, you were looking at a bathroom wall niche. Instead of projecting into the room, a niche sits inside the wall cavity, giving you storage that feels like part of the architecture. Shower niches are the most common application, but you’ll also find them above bathtubs, beside vanities, and even on dry walls as decorative display recesses.

Planning a niche before tile work begins matters most. The wall framing, board cutouts, waterproofing, and tile layout all need to align, so deciding on the niche’s size and location early saves you from costly rework. Below we cover how these recesses are built, the waterproofing rules that keep them from failing, and the sizing details that make them genuinely useful.

How a Bathroom Wall Niche Is Constructed

A niche is built by locating the opening between studs or within the framing, tracing the footprint onto the wallboard, and cutting the opening with a small allowance for adjustments. You then dry-fit the unit, secure it to the framing with screws, and seal every seam before tiling.

Dawn’s installation sheet for its pre-formed niches lays out the typical sequence: build wood framing and blocking to the niche’s measurements, install tar paper and cement board, trace and cut the opening with roughly a 1/4-inch allowance, apply silicone caulk around the flange, screw the niche into place, then smooth thinset from the flange to the wall for a perfectly flat surface. Custom Building Products’ instructions take a similar path—trace the footprint, cut the drywall, insert the pre-formed niche, and secure it with two or more 1.5- to 2-inch galvanized steel screws, covering the screw heads with sealant.

Waterproofing Rules That Prevent Niche Failure

Improper waterproofing is the primary failure risk in shower niches, and every major manufacturer treats it as the critical step. The flange must be supported and bonded on all sides, with blocking added behind the frame so the unit stays rigid.

Schluter’s DESIGN-NICHE instructions specify the full system: use KERDI-FIX to adhere foam spacers and seal the gap between the frame and the niche body, then embed KERDI-BAND over the seams and tile around it. Multiple installation guides stress the same principle regardless of brand—seal all seams and use a continuous membrane or sealant system so no water can sneak behind the tile and into the wall cavity.

One more detail worth checking: the niche floor should slope toward the shower so water doesn’t pool inside the shelf. Third-party technical guidance commonly cites a minimum of 1/8 inch per foot, which keeps standing water from becoming a breeding ground for soap scum and mildew. The installation method itself depends on your niche system and wall substrate—official guides reference cement board, KERDI-BOARD, drywall, and waterproofing membranes as system-specific components.

Niche Sizing and Design Limits

There is no single code-compliant size or universal standard—niche dimensions vary by manufacturer and by the wall cavity you’re working with. What matters is the reveal edge depth, which Schluter specifies at a minimum of 1/8 inch and a maximum of 2-3/16 inches (3 to 55 mm).

That depth range directly affects how your tile sits around the niche opening. Shallow reveals give a cleaner, more modern look; deeper reveals create a more pronounced frame. The niche’s interior width is typically limited by the stud spacing in your wall, which is why most pre-formed units are designed to fit between standard 16-inch-on-center framing.

For a quick comparison of the two main niche types:

FAQs