How Much Does a Wet Room Cost in Boise? (2026)

The short answer

Today's Homeowner (2025) prices wet room installation at an average of $21,600 — roughly 20% more than a traditional bathroom remodel — with converting an existing bathroom into a wet room running $11,000–$18,000, and a broader remodeling range spanning $2,000–$18,000 depending on how much of the room changes.

Fixr (2025) prices a "full wet room" specifically, as part of its disability/accessible remodeling cost data, at $14,000–$22,000 — a figure that lines up closely with Today's Homeowner's conversion range and average. Bob Vila (2021) doesn't publish a cost figure at all, noting only that waterproofing every surface "from top to bottom can get expensive." Taken together, the cited ranges point to a project that typically runs from the low five figures into the low twenties, not a small add-on cost.

Why full-room waterproofing changes the budget

In a standard bathroom, only the tub and shower walls need to be truly waterproof. Today's Homeowner (2025) explains that a wet room is different: "all walls, and potentially even ceilings, need to be waterproof," which means waterproof paint and wallboard rated to repel moisture extend across the entire room, not just the wet zone. That is the core reason a wet room costs more than a comparable shower remodel — the membrane work multiplies with the square footage of the room, not just the shower footprint.

Bob Vila (2021) frames the same tradeoff from the finish-material side: because every surface has to hold up to water, "material limitations due to waterproofing requirements" narrow the flooring and wall-finish choices compared with a dry-zone bathroom, and the extensive tiling this requires is itself a meaningful share of the cost.

Drainage slope and the step-down question

Because there is no shower pan or curb to contain water, the entire wet room floor has to carry water to a drain by slope alone. Today's Homeowner (2025) describes this directly: "the floor will be gently sloped in the direction of the drain," and many wet room designs still use "a step — between the wet bathroom and the rest of the house to keep water inside," rather than going fully flush with an adjoining dry hallway or bedroom.

That drainage design is the same engineering question a curbless shower has to solve, just applied across a whole room instead of a single stall — which is part of why a wet room conversion typically costs more than a curbless shower alone.

Glass partitions: keeping some of the room dry

Not every wet room is fully open. Bob Vila (2021) describes designs that use "a glass wall with a glass door to divide a bathroom into a wet room side (with shower, sink, and tub) and a non-wet room side," or "a partial glass partition separating the shower from the toilet and sink." Today's Homeowner (2025) frames the same choice as confining "spray from the shower to the portions of the bathroom served by the drains."

A glass partition adds cost over a fully open layout, but it keeps towels, a vanity, or a toilet area dry — which is often the deciding factor for homeowners who like the wet room look but don't want the entire room to get wet on every shower.

Accessibility is a side benefit, not the whole story

Today's Homeowner (2025) notes that eliminating "high tub edges" is a real advantage of a wet room "as we age, stepping over a tub edge or shower tray can become a difficult and even hazardous proposition" — the same flush-entry logic behind a curbless shower. But a wet room is a design choice built around openness and a specific look, not a substitute for an accessibility-focused remodel. If barrier-free access is the primary goal rather than the aesthetic, our accessible bathroom remodel cost guide covers grab-bar blocking, clearances, and comfort-height fixtures more directly.

What Boise Bath publishes

Boise Bath doesn't publish a standalone wet room rate — it's a full-room waterproofing scope that sits between our published categories rather than inside one of them. Our Walk-In / Custom Tile Shower category, published at $12,000–$22,000, covers a comparable shower build but not full-room membrane work; our Guest Bathroom Remodel category, published at $15,000–$28,000, is closer in overall scope since it touches the whole room. Based on the cited national data above, expect a Boise wet room conversion to land in that same general band, with the exact number driven by room size, whether a glass partition is included, and how much of the existing floor structure needs to change to build in slope. For the full picture, see our Boise bathroom remodel cost guide and our wet room conversion service page.