A walk-in shower is any shower you step into without climbing over a tub. The good ones share a handful of decisions made before the first tile went on: the footprint, whether there is a curb, where the valve sits so you can turn it on without getting wet, where the niche goes, and whether the room will ever become a steam shower. Get those right and the shower feels bigger than it is. Get them wrong and no amount of expensive tile fixes it.
This guide walks through each decision in the order a contractor makes them, with the dimensions that work, the code minimums in Canada, and what each option adds to the budget.
The numbers that matter
- Minimum shower size: 30×30" by code; 32×32" is the practical floor. 36×36" is comfortable; 36×48" or larger for a doorless walk-in.
- Doorless entry: the open side needs a 24–30" splash zone or a fixed glass panel; the shower head must point away from the opening.
- Valve height: 38–48" from the floor, placed so you reach it from outside the spray. Shower head: 80" (72" minimum).
- Niche: 12×24" between studs, bottom shelf at 48–54", never on the exterior wall.
- Bench: 17–19" high, 15–16" deep. Curbless: needs the subfloor recessed 1-1/2–2" or a linear drain.
- Steam shower: sealed enclosure to the ceiling, 7–8 ft ceiling sloped 2" per foot, generator sized to the cubic footage, 240 V circuit.
Walk-in shower sizes
| Size | How it feels | Door or open? |
|---|---|---|
| 30×30" / 32×32" | Code minimum. Elbows touch glass. Fine for a basement or secondary bath. | Needs a door or curtain; water goes everywhere otherwise |
| 36×36" | Comfortable for one adult. The most common tub-to-shower conversion footprint is 30×60, so this is often the compromise when a vanity shares the wall. | Door, or a fixed panel with a 24" opening |
| 36×48" / 36×60" | The standard tub alcove converted to a shower. Room for a bench at one end and a niche on the long wall. | Doorless works with a 30–36" fixed panel at the head end |
| 42×60" and up | Two people, a rain head and a hand shower, a full bench. Primary ensuite territory. | Doorless, often with no glass at all if the entry is 48" from the spray |
Measure the room with the door swing and the toilet clearance drawn in. A shower that is 4 inches wider but leaves 18 inches in front of the toilet instead of the required 21 is a shower that fails inspection.
Curb or curbless?
A curb is the 4–6-inch step at the shower entry. It exists to keep water in, and it is the cheapest, most forgiving way to do that. A curbless (zero-threshold) shower runs the floor tile straight in, which looks cleaner, makes the bathroom feel larger and is the only option for anyone who may ever use a walker or wheelchair. It costs more because the shower floor has to sit lower than the bathroom floor.
| Curb | Curbless | |
|---|---|---|
| What it needs | A standard shower pan or mortar bed on the existing subfloor | Subfloor recessed 1-1/2–2" (sistered joists or a recessed pan), or a linear drain at the back wall so the whole floor slopes one way |
| Minimum size to stay dry | Any | 36×48" with glass, 42×60" doorless |
| Added cost in Canada | Baseline | $1,500–$3,500 for the recess, waterproofing and linear drain |
| Where it works | Everywhere | Easiest on a wood-framed floor; on a condo slab it usually needs a topping layer across the whole bathroom |
Where the valve, head and hand shower go
The most common walk-in shower mistake is a valve directly under the shower head, so you stand in cold water to turn it on. Put the valve on a side wall or near the entry, 38–48 inches from the floor, where you can reach it from outside the spray.
- Fixed shower head: 80 inches from the floor (72 minimum). A rain head on a ceiling arm goes at 84–96 inches.
- Hand shower on a slide bar: bar mounted so the holder ranges from about 48 to 72 inches. This is the piece that makes a shower usable for children, for cleaning, and for anyone seated on a bench.
- Body jets: in a column at roughly 24, 36 and 48 inches, on the wall opposite the entry.
- Valve type: Canadian code requires an anti-scald valve, either pressure-balanced or thermostatic. A pressure-balanced valve runs one outlet at a time (or two with a diverter); a thermostatic valve runs a rain head, hand shower and jets together at a set temperature. If you want more than two outlets running at once, choose thermostatic.
Lauretta Galati Shower Set
$249.99
Single-function; secondary bathrooms
Kodaen Madison 2-Way
$420
Rain head plus hand shower on a slide bar
Kodaen Crystal Thermostatic 3-Way
$779.80
Head, hand shower and jets at once
Shower niche: size and placement
A niche is a recessed shelf built between two studs. It is the detail people notice most in a finished shower and the one most often put in the wrong place.
| Decision | What works |
|---|---|
| Width | 14-1/2" is the space between studs on 16" centres; that is where a 12"-wide finished niche comes from. Wider niches need a header and a stud moved, which is a carpentry job worth doing at framing stage. |
| Height | 12" for one shelf, 24" with a middle shelf. Match the height to your tile module so the niche edges land on grout lines. |
| Height off the floor | Bottom shelf at 48–54" for standing use; a second low niche at 18–24" beside a bench for shaving. |
| Which wall | An interior wall, never the exterior wall (insulation and vapour barrier) and not the wall the valve is on (pipes). The wall opposite the entry, or the long wall, is usual. |
| Slope and waterproofing | The bottom shelf slopes toward the shower 1/8" so water drains; the whole recess gets the same membrane as the walls. Prefab foam niche inserts ($60–$200) make this reliable. |
| Cost | $250–$600 installed and tiled, including the insert. |
Bench, glass and grab bars
- Bench: 17–19 inches high, 15–16 inches deep, sloped 1/4 inch toward the drain. A built-in bench needs the same waterproofing as the floor. A fold-down teak seat is the retrofit option.
- Glass: 3/8-inch tempered for frameless panels, 1/4-inch for framed. A single fixed panel at the head end is the cheapest way to make a doorless shower work, at $600–$1,200 installed. A full frameless enclosure runs $2,000–$3,500.
- Grab bar blocking: add 2×10 blocking between studs at 33–36 inches on at least two walls while the framing is open, whether or not you install bars now. It costs $40 in lumber and saves opening the tile later.
Steam shower: what it actually takes
A steam shower is a walk-in shower that has been sealed and fitted with a steam generator. The showering part is identical; the steam part imposes five requirements that must be designed in before tile.
- A sealed enclosure. Glass to the ceiling, or a transom above the door that closes. Any gap at the top lets the steam out and the moisture into the rest of the bathroom.
- A low, sloped ceiling. 7 to 8 feet, sloped about 2 inches per foot so condensation runs down the wall instead of dripping on you. Higher ceilings need a bigger generator and still drip.
- Vapour barrier and non-porous finishes. A proper membrane behind every surface including the ceiling, and porcelain or glass tile rather than natural stone, which absorbs steam and stains.
- A correctly sized generator. Multiply length × width × height in feet for cubic footage, then add 30% for porcelain tile, 100% for stone, and more for an exterior wall or skylight. A 4×5×8 ft shower is 160 cu ft; with porcelain that is about 210, which a 6–7.5 kW generator handles. The generator needs a dedicated 240 V circuit and sits within 25 feet of the shower, usually in a vanity cabinet or closet.
- A steam head placed low, 6–12 inches above the floor, away from the bench so nobody sits in the jet, plus a bench to sit on because steam sessions are 15–20 minutes.
Budget $1,500–$3,500 for a generator and control, $1,500–$3,000 for the electrical and plumbing, and $500–$1,500 for the ceiling and transom work on top of the walk-in shower itself.
What a walk-in shower costs in Canada
| Option | Typical installed cost |
|---|---|
| Acrylic shower base and wall kit, 36×36, with door | $3,000–$5,500 |
| Tiled walk-in shower with curb, 36×48, glass panel | $7,000–$13,000 |
| Curbless tiled shower with linear drain, 42×60, frameless glass | $11,000–$18,000 |
| Add a shower niche | +$250–$600 |
| Add a built-in bench | +$500–$1,200 |
| Convert to steam shower | +$3,500–$8,000 |
| Shower system (valve, head, hand shower) | $130–$1,440 for the fixture; see shower systems |
Pre-tile checklist
- Footprint drawn with door swing and 21" toilet clearance.
- Curb or curbless decided; if curbless, drain type and subfloor recess confirmed.
- Valve on a wall reachable from outside the spray, 38–48" high.
- Shower head at 80"; slide bar for the hand shower.
- Niche on an interior wall, sized to the tile module, bottom at 48–54".
- Grab bar blocking at 33–36" on two walls.
- Bench waterproofed and sloped, if included.
- If steam is even a possibility: ceiling height and slope, transom, generator location and 240 V circuit planned now.
- Shower system on site before the plumber’s rough-in visit, because the valve body goes in the wall first.
Frequently asked questions
What is the minimum size for a walk-in shower?
Thirty by thirty inches is the code minimum in Canada, and 32×32 is the practical floor with a door. For a doorless walk-in, plan on at least 36×48 with a fixed glass panel, or 42×60 with no glass.
Does a walk-in shower need a door?
Not if it is large enough and the head points away from the opening. A fixed panel at the head end usually does the job in a 36×48 shower; below that size you need a door or the floor outside stays wet.
How big should a shower niche be?
Twelve by twenty-four inches is the standard: 12 inches wide fits between studs on 16-inch centres, and 24 inches tall allows a middle shelf. Set the bottom at 48–54 inches for standing use.
Can any shower be a steam shower?
Only if it can be sealed to the ceiling, has a ceiling of 7–8 feet that can be sloped, is finished in non-porous tile over a full vapour barrier, and has room within 25 feet for a generator on a 240 V circuit. Retrofitting steam into an existing tiled shower usually means retiling.
Pressure-balanced or thermostatic valve for a walk-in shower?
Pressure-balanced for a single head or a head-plus-hand-shower setup, which covers most bathrooms. Thermostatic if you want a rain head, hand shower and body jets running at the same time at a fixed temperature.
How much does a walk-in shower cost in Canada?
A tiled walk-in shower with a curb and a glass panel runs $7,000–$13,000 installed; curbless with frameless glass runs $11,000–$18,000. Acrylic kits with a door start around $3,000.
Shower systems for every layout
Pressure-balanced and thermostatic systems from Kodaen and Lauretta, all with the rough-in valve included. Browse shower faucets and systems. Orders over $600 ship free in Ontario.
