How much does a walk-in shower cost?

Add a base, the tiled wall area, glass and labor on your own prices. A three-wall enclosure of 102 sq ft at $12/sq ft with a $400 base and $900 glass is around $2,524 before labor. Size it with the walk-in shower cost tool.

Is a tub-to-shower conversion cheaper than a new bathroom?

Usually, because you reuse the existing footprint and much of the plumbing. The extra cost over a fresh walk-in build is the tub removal and any valve or drain change. Work it out on the conversion worksheet.

How do I measure shower wall tile area?

Multiply the perimeter of the walls you will tile by the tile height, add niche and bench faces, then apply a 10–15% waste factor for cuts. The tile area & cost tool does this for you.

Do I need a permit for a tub-to-shower conversion?

Because it touches plumbing, usually yes. Treat it as licensed-pro, permit-and-inspection work and confirm requirements with your local building department.

Walk-in shower & tub-to-shower conversion cost

A walk-in shower and a tub-to-shower conversion share the same building blocks — a base or pan, a tiled wall area, a valve, glass and labor — but the conversion adds tub removal and often new plumbing. Here is how to price both from your own quotes.

By Francesco Zinghinì

Two of the most-searched bathroom projects are building a walk-in shower and converting an existing tub into a shower. They look similar in the finished photos, but the budgets are assembled slightly differently. Both are handled on the prices you enter — the walk-in shower cost tool and the tub-to-shower conversion worksheet.

Walk-in shower: the four blocks

A walk-in shower budget is a base plus a tiled wall area plus glass plus labor:

Base or pan: a pre-formed acrylic base or a mortar bed for a fully tiled floor.
Wall tile: the big variable — wall area = perimeter of the tiled walls × height. A three-wall enclosure of 7 + 3 + 7 = 17 linear feet tiled to 6 feet is 102 sq ft.
Glass: a fixed panel, a door, or a frameless enclosure — entered as a single price.
Labor: waterproofing, setting tile and installing the valve and glass.

The formula is total = base + wall tile area × $/sq ft + glass + labor. Worked example: 102 sq ft × $12 + $400 base + $900 glass is about $2,524 before labor and before you adjust to your real numbers. Because tile area drives the cost, size it carefully — a niche, a bench and a full-height ceiling all add square footage.

Tub-to-shower conversion: a worksheet

A conversion starts from a working tub, so the budget adds the demolition the walk-in build does not:

Tub removal & disposal.
New base or pan sized to the old tub footprint.
Wall tile area for the new enclosure.
Valve & plumbing: a tub often has a different valve and drain location than a shower, so this line can be significant.
Glass and labor.

The worksheet sums the lines you enter: for example $250 tub removal + $500 new base + 80 sq ft of tile at $12 ($960) + $450 plumbing + $900 glass + $1,300 labor = $4,360. Enter your own figures from an itemized quote and the total updates.

Sizing the tiled wall area

The single most common estimating mistake is guessing the tile area. Measure the perimeter of the walls you will tile, multiply by the tile height, and add any niche or bench faces. Then apply a waste factor for cuts — 10% for a straight lay, up to 15% for diagonal or mosaic work — using the bathroom tile area & cost tool. Ordering a spare box now is far cheaper than dye-lot hunting a repair tile later.

Where the money and the risk sit

On both projects, tile area and labor dominate the total, and plumbing is where the surprises hide. Moving a drain or discovering a rotted subfloor under an old tub can turn a tidy conversion into a bigger job, which is why a contingency belongs in the plan. And because a conversion touches plumbing — and sometimes electrical for a new light or fan — it is licensed-pro, permit-and-inspection work.

Waterproofing: the invisible line that matters most

The most important part of a shower is the part you never see: the waterproofing behind the tile. Tile and grout are not themselves waterproof — water passes through grout, and the membrane or backer system behind the tile is what actually keeps the wall dry. Skimping here is how a beautiful shower becomes a mold and rot problem in a few years. Whether the estimate uses a sheet membrane, a liquid-applied membrane or a foam backer board, waterproofing is real labor and material that belongs in the number, usually folded into the labor and materials lines rather than shown separately. When you compare two shower quotes, ask each what waterproofing system they use; a bid that is cheap because it tiles over ordinary drywall or green board is not a bargain, it is a future repair. This is one place where the lowest price is almost never the right choice.

Curbless, accessibility and drainage

A growing share of walk-in showers and conversions are built curbless — a flush, barrier-free entry that is easier to walk into, easier to clean, and helps a home age with its owners. Curbless is worth understanding as a cost driver because it usually means recessing or sloping the subfloor to create drainage below the finished floor level, and sometimes relocating the drain to a linear channel at the wall. That is more labor and more plumbing than a standard base with a curb, so it lands as higher figures in the base, plumbing and labor lines you enter. If accessibility is a goal, also budget for grab-bar blocking in the walls (cheap to add during framing, expensive to retrofit) and a bench. None of this changes the formula — base plus tiled area plus glass plus labor — but it shifts several of those inputs upward, which is exactly why estimating on your own quoted figures beats any generic average.

Estimate, not a bid. These are planning numbers on the figures you enter. Plumbing and any structural change must be done by licensed professionals and usually need a permit and inspection. Get itemized written quotes and confirm code with your local building department.