Wet Room Conversion in Bellevue, WA
Bellevue Kitchen Remodeling Pros is the Eastside's specialist in wet room construction, specializing in full-room waterproofing, sloped floor and linear drain installation, and large-format porcelain tile setting. We offer bench seating and frameless glass splash panels.
Free written estimate
Tell us about the project and we will get back to you the same business day.
Or call (940) 209-3977. Calls only, we do not receive text messages.
Licensed, insured and bonded in Washington State. No obligation, and no charge for the visit.
Thank you. We have your request and will reply the same business day.

BeforeAfterThe finish standard we hold you to
Drag the handle across. These two frames are a kitchen project, shot from one camera position with no staging in between.
We show a kitchen here because tile setting, waterproofing and cabinet work are the same trades that build a bathroom, and this is the standard we hold on both. Ask at the estimate and we will walk you through bathroom work in person.
See the galleryOur team provides thermostatic and pressure-balanced valve rough-in, delivering seamless, open bathrooms for homes and hard-wearing wet zones for both primary suites and guest baths. Backed by a Washington State contractor license and general liability insurance, we take on work at every scale, from a 45 square foot guest bath opened up completely to a 160 square foot primary suite wet zone.
From setting the fall across an entire floor to lapping membrane up the walls above the splash line, our team handles every detail. Serving Bellevue and neighboring Kirkland, Issaquah and Sammamish, we deliver careful, watertight work and reliable, professional, beautiful results on every wet room project.
Call (940) 209-3977 for a free in-home estimate. We will confirm the floor structure can take the slope before we talk tile.
What Makes a Room a Wet Room
A wet room is defined by the whole room being waterproofed, not just the shower enclosure. That is the entire distinction. A standard bathroom waterproofs a pan inside a curb and treats the rest of the floor as dry space. A wet room treats the room as the wet area, with the floor sloped to a drain and an open shower that has no raised threshold at all.
Whole-room waterproofing. Waterproofing material goes over the shower walls and floor, carries up the surrounding walls above the splash line, and is only then covered with tile. Corners, penetrations and the door threshold get detailed, and we flood test before tile.
Floor slope. The finished floor falls toward the drain across its whole run, with no hump and no dead corner. That slope is built into the substrate, which usually means recessing or re-framing the floor so the finished tile still meets the hallway flush.
Linear drains. A linear drain takes the fall in one direction instead of four, so the floor tiles in large-format porcelain on a single plane rather than four quadrants around a center drain.
Want the look without opening the whole floor? A walk-in shower with a low curb is the middle option, covered on the master bathroom remodeling page.
Wet Room Conversion Cost in Bellevue
Figures below are typical 2026 Seattle and Eastside ranges, not quotes. Wet room work prices above a comparable standard bathroom because the waterproofed area, the floor structure and the drain all change.
| Scope | Typical Bellevue range | What it covers |
|---|---|---|
| Tub-to-shower conversion, open entry | $15,000 to $30,000 | Tub out, curbless base, linear drain, new valve, tile |
| Walk-in or open shower installation | $18,000 to $40,000 | Shower build, bench, niche, waterproofing, glass panel |
| Guest bath wet room, 45 to 65 sq ft | $22,000 to $35,000 | Whole room waterproofed, floor re-sloped, fixtures reset |
| Primary bath wet zone, 90 to 120 sq ft | $55,000 to $85,000 | Larger footprint, double vanity, freestanding tub in the wet zone |
What moves the number:
- Layout changes and plumbing relocation. Setting a new fall and moving the drain is the core cost, not the tile. A linear drain rarely lands where the old shower drain sat.
- Home age. Bellevue holds 64,688 housing units, and much of the 1950s to 1970s stock in Lake Hills and Newport has shallow joists that decide whether the floor is recessed or rebuilt.
- Waterproofing systems. A whole-room membrane is several times the area of a shower pan, and it is the one line that must never be value-engineered.
- Material specification. Large-format porcelain, mosaic, zellige and natural stone price differently, and so does the valve.
How the Conversion Runs
- In-home visit. We check joist direction and depth, look at what sits below the bathroom floor, and locate the existing drain.
- Written proposal. Dimensioned plan, slope and drain strategy, line-item pricing with allowances.
- Permits. City of Bellevue permits for the moved drain, new circuits and framing changes.
- Demolition and floor preparation. Structure recessed or re-framed to carry the fall, blocking set for the bench.
- Rough-in and inspection. Drain, vent, supply, valve bodies, electrical.
- Waterproofing and flood test. Membrane over floor and walls, corners and penetrations detailed, then water held and checked.
- Tile, fixtures, glass panel, lighting.
- Punch list and final walkthrough.
Four to seven weeks on site for most conversions, longer where the floor is re-framed.
Materials and Technical Detail
Tile does two jobs here, drainage and grip. Porcelain is the default: dense, available in slip-resistant finishes, made in large formats that suit a single plane of slope. Glazed ceramic is the economical option. Mosaic works well on the sloped area because the extra grout lines follow the fall and add traction. Natural stone (marble, onyx, granite, slate) is less uniform in color and pattern and needs more planning, and polished stone is wrong underfoot in a room designed to be wet. Glass, metal and zellige make good accent bands, and encaustic tile holds its pattern through the full thickness. Staggered and offset settings hide small floor variation; herringbone and chevron belong on a wall.
Fittings matter as much as surfaces. We set a pressure-balanced valve so the water holds constant pressure with no temperature fluctuation when a toilet flushes elsewhere, or a thermostatic valve where the client wants the set temperature held exactly. Showerheads can be fixed, ceiling-mounted or a handheld on a slide bar, and most wet rooms use two on a diverter. Glass is optional here, which is the point, though one frameless splash panel keeps the toilet and towel bars dry.
Radiant floor heat earns its keep, run as resistive electric mats or hot water tubing, because it dries the floor faster between uses. Electrical follows the usual bathroom rules: GFCI at every receptacle, IP44 rated fixtures, and two light sources at the mirror set a foot or more apart.
Related Services
A wet room is often the cleanest answer to an accessibility brief, since there is no curb to step over. Read accessible and aging-in-place bathroom remodeling if that is the goal. Where walls have to move, start with bathroom layout reconfiguration. Compact rooms sit on small bathroom remodeling, high-end suites on luxury master bathroom remodeling, and tower units on condo bathroom remodeling.
Tile work in the kitchen at the same time keeps one crew on site. See kitchen backsplash installation. The full bathroom offer sits on our bathroom remodeling page, the company overview on the home page.
Areas We Serve
Across Bellevue: Downtown, West Bellevue, Somerset, Woodridge, Newport, Lake Hills, Crossroads, Bridle Trails, Eastgate, Factoria, Wilburton and BelRed, ZIP codes 98004 through 98009.
Wet room conversions also run to Kirkland, Sammamish, Issaquah, Mercer Island and Redmond, plus Medina, Clyde Hill and Newcastle. Interstate 405 and Interstate 90 keep the whole area close.
Why Bellevue Homeowners Choose Us for Wet Rooms
We flood test before tile. Every time. A wet room that leaks is not a callback, it is a rebuild.
Slope is set in the substrate. Not faked with thick-bed mortar under the last row of tile.
Licensed and insured. a Washington State contractor license and general liability. Certificates before work starts.
We say when a wet room is the wrong call. Shallow joists over a finished ceiling, or a single family bathroom used by small children, often point to a low-curb walk-in shower instead.
Frequently Asked Questions
Straight answers, from the questions we get asked at the estimate.
What is a wet room?
A wet room is a bathroom where the entire room is waterproofed rather than just the shower enclosure, with the floor sloped to a drain and an open shower that has no curb or threshold.
How much does a wet room conversion cost in Bellevue?
A 45 to 65 square foot guest bath generally runs $22,000 to $35,000. An open or walk-in shower installation is usually $18,000 to $40,000, and a 90 to 120 square foot primary wet zone typically lands between $55,000 and $85,000. Ranges, not quotes.
Will the rest of the bathroom get soaked?
Not in a properly designed room. Fall direction, drain placement, showerhead position and a single splash panel keep water where it belongs, and the membrane behind the tile makes any stray water harmless.
Does a wet room need a linear drain?
Not strictly, but it is the better detail. A linear drain lets the floor fall in one direction, which supports large-format tile and a cleaner look than four sloped quadrants around a center drain.
Can any bathroom become a wet room?
Most can. The constraint is the floor structure, since the slope is built into the substrate. We check joist direction, depth and what sits below before quoting.
How long does the work take?
Four to seven weeks on site, longer where the floor is re-framed. Waterproofing, flood testing and tile set the schedule.
Do I need a permit?
Moving the drain, adding circuits or altering framing all require a City of Bellevue permit. We pull and manage them inside the contract.
Do you offer free estimates?
Yes. Free in-home estimates with no obligation. Call (940) 209-3977. We serve Bellevue 98004 through 98009 plus Kirkland, Redmond, Sammamish, Issaquah and Mercer Island.
Are you licensed and insured in Washington?
a Washington State contractor license and general liability coverage. Certificates on request before work begins, and workmanship is covered by a written workmanship warranty.
Get a Free Wet Room Estimate in Bellevue
We will check the floor structure, find the drain, talk through slope and glass, and hand you a written number with the allowances spelled out.
Free written estimate
Tell us about the project and we will get back to you the same business day.
Or call (940) 209-3977. Calls only, we do not receive text messages.
Licensed, insured and bonded in Washington State. No obligation, and no charge for the visit.
Thank you. We have your request and will reply the same business day.
Related services
Every service is available across Bellevue and the Eastside.
Areas we serve
Bellevue plus five Eastside cities, each with its own page.
