Quick Answer
A walk-in shower installed in Seattle costs $14,000–$22,000 in 2026 and is typically completed in one to three days. The practical minimum size is 36" × 36", with 36" × 60" — the footprint of a standard bathtub — being the most common conversion. A curbless entry costs modestly more at installation and is far cheaper now than retrofitting it later.
What counts as a walk-in shower
The term gets used loosely, so here's how we define it: a shower you step into rather than climb into, with either a low curb (roughly 4 inches) or no curb at all, and an entry wide enough to move through comfortably.
That's a broader category than most people assume. It includes:
- A conversion — a shower built in the space a bathtub used to occupy
- A replacement — an existing shower rebuilt properly
- A curbless (zero-threshold) shower — floor flush with the bathroom floor
- A doorless walk-in — an open entry with a glass panel and no door at all
All four are walk-in showers. Which one fits depends on your room, your floor structure, and how you want the space to feel.
Sizes: what actually fits in a Seattle bathroom
An enormous share of Seattle bathrooms are under 50 square feet — which sounds constraining until you realize a bathtub is already taking up 15 of them.
| Size | Feels like | Notes |
|---|---|---|
| 36" × 36" | The practical minimum | Comfortable for one person, tight for a bench |
| 36" × 48" | Comfortable | Room for a corner bench or a niche |
| 36" × 60" | The standard conversion | Exactly where the tub was. No layout change, no plumbing move |
| 42" × 60" | Generous | Bench, dual heads, easy movement |
| 60" × 60"+ | Spa scale | Usually a primary suite or a footprint expansion |
The 36" × 60" conversion is the sweet spot for Seattle homes, because it uses the space that already exists and requires no structural or layout change. That's what makes a one-day installation possible.
One design note for small bathrooms
Clear glass makes the room look bigger, frosted or textured glass makes it look smaller. In a compact bathroom, clear glass with a minimal frame is almost always the right call visually — even though it shows water spots more readily.
Curbless vs. low curb: the decision worth thinking about
| Low curb (~4") | Curbless / zero threshold | |
|---|---|---|
| Cost | Included in base pricing | Modest premium |
| Water containment | Curb does the work | Requires precise floor slope and a linear drain |
| Wheelchair / walker access | Limited | Full |
| Cleaning | Curb collects grime at the joint | Nothing to clean around |
| Look | Conventional | Continuous floor, visually larger room |
| Floor requirements | Minimal | May require modifying the subfloor to recess the pan |
Our recommendation: if you plan to stay in the house more than about ten years, or anyone in the household is over 60, take the curbless option now. The premium at installation is modest. Retrofitting it means removing a shower you just paid for.
The look isn't clinical, either — curbless is showing up in high-end new construction precisely because a continuous floor reads as more modern and makes a small room feel larger. More on that here.
The one caveat in older Seattle homes: a true zero-threshold pan often requires recessing into the subfloor. On a second floor in a pre-1950 house, that means checking the joist structure first. We do that at the consultation, before promising anything.
Glass: doors, panels, and what each costs
Glass is the easiest place to move your budget in either direction, and it's where quotes most often diverge.
| Option | Typical installed range | Best for |
|---|---|---|
| Sliding door (framed) | $600 – $1,400 | Tight bathrooms where a swing door won't clear the vanity |
| Semi-frameless hinged door | $1,200 – $2,400 | Most bathrooms — clean look, moderate cost |
| Frameless heavy glass | $2,500 – $4,500 | A premium, nearly invisible enclosure |
| Fixed panel, no door | $900 – $2,000 | Doorless walk-ins with a wet zone; needs enough room depth |
| Curtain | Under $200 | Budget, or when the entry is very wide |
Door clearance. In small Seattle bathrooms, an outward-swinging hinged door frequently hits the vanity or the toilet. Measure this before you fall in love with a look. A slider or a fixed panel solves it.
Doorless works — with conditions. An open walk-in needs enough depth (generally 60"+ from the entry to the showerhead wall) so spray doesn't reach the rest of the room, and it works far better with a properly heated bathroom. In an underheated Seattle bathroom in January, an open shower is noticeably colder.
What a walk-in shower costs in Seattle
| Component | Range |
|---|---|
| Complete installed system | $14,000 – $22,000 |
| — Fiberglass wall system | from ~$14,000 |
| — Stone-look solid surface | ~$16,000 – $18,000 |
| — Custom tile | quoted per project |
| Curbless upgrade | Modest premium over a low curb |
| Frameless glass upgrade | +$1,500 – $3,000 over a basic slider |
| Built-in bench | +$400 – $1,200 |
Every complete system includes demolition and haul-away, inspection of the framing and subfloor, waterproofing, the wall system to the ceiling, base, valve and fixtures, and glass. Full cost context in our Seattle bathroom remodel cost guide.
Features that earn their place
A built-in bench
Useful at every age — shaving, resting, or simply having somewhere to put things. Build it in rather than adding a plastic stool later.
Blocking behind the walls
Wood backing installed during construction so a grab bar can be anchored properly any time in the future. It costs almost nothing now and requires opening a finished wall later. Do it even if you don't want grab bars today.
A hand-held wand on a slide bar
The most useful fixture in the shower. Makes cleaning the shower itself dramatically easier, and adapts to whoever is using it.
A recessed niche
Nowhere for bottles to sit on the floor and nothing to clean around.
Slip-resistant flooring
Standard on our bases, and worth confirming on any quote you receive.
Walls to the ceiling
In Seattle, the drywall above a shower is where the paint peels. Here's why.
Frequently Asked Questions
Want to know what fits your bathroom?
Book a free in-home consultation or call (425) 345-5194. We measure the room, check the floor structure, and show you exactly which configurations work — with a written quote on the same visit.