Converting a bathtub to a walk in shower is one of the most requested bathroom projects, and it covers an unusually wide range of work. Two homeowners can describe the same project and mean jobs that differ by a factor of five in cost and by weeks in duration.
The variable is not the shower. It is how much of the wall, floor, and plumbing gets rebuilt along the way.
The Three Levels of Project
A prefabricated unit dropped into the existing footprint. The tub comes out, a moulded acrylic or fiberglass base and wall surround goes in, and the plumbing stays where it is. This is the quickest and least expensive route, and it is what most one day bath companies sell. Done well it is a perfectly good bathroom.
A tiled shower in the existing footprint. The tub comes out, a waterproofed base and tiled walls go in, and the plumbing stays roughly where it is. This costs considerably more because tile is labor intensive and waterproofing has to be done properly, and it takes days rather than a day.
A reconfiguration. The shower moves, the footprint changes, the drain relocates, or the layout of the room changes. This brings in plumbing, sometimes framing, sometimes floor structure, and is a full bathroom project rather than a conversion.
Cost scales roughly with that list. Published ranges for a straightforward prefabricated conversion typically start in the low thousands, tiled conversions in the existing footprint commonly land in the mid thousands to low five figures, and reconfigurations run higher and overlap with full bathroom remodel pricing. Figures vary considerably by region and by material.
What Actually Drives the Price
- Tile versus prefabricated. Labor is the difference. Tile takes days of skilled work; a surround panel goes up in hours.
- Glass. A frameless glass enclosure is a substantial line item on its own and often costs more than homeowners expect. Framed enclosures and curtains cost far less.
- Drain relocation. Moving the drain means opening the floor, which is straightforward over a crawl space or basement and considerably harder on a concrete slab or under a finished ceiling below.
- Curbless entry. A zero threshold shower requires the subfloor to be recessed or the floor built up, which is real structural work and adds meaningfully to the cost.
- Valve and plumbing upgrades, including a thermostatic or pressure balanced valve, which many codes now require.
- Niches, benches, and grab bars, each of which is blocking and detailing work behind the tile.
- What is found behind the tub. Rot in the subfloor and studs from a long term leak is one of the more common discoveries in this project.
That last point deserves emphasis. The area behind and beneath an old tub is a classic place for slow water damage, and it is invisible until the tub comes out. Ask for a stated rate for rot repair rather than an open ended charge, along the lines described in budgeting for the parts of a project you cannot see.
Waterproofing Is the Part That Matters
Everything visible in a shower is finish. The thing that determines whether the bathroom is still sound in fifteen years is the waterproofing behind it.
For a tiled shower, ask specifically what waterproofing system is being used. Tile and grout are not waterproof, and a shower relying on them alone will eventually leak into the structure. Modern practice uses a sheet or liquid applied membrane, a properly bonded pan, and correct treatment at the curb and corners.
For prefabricated units, the equivalent question is how the panels seal at the seams and where the flange integrates with the wall.
A contractor who answers this question in detail is a contractor who has thought about it. Vague answers here are a warning.
Accessibility
A large share of these conversions are driven by accessibility rather than aesthetics, which we noted in accessibility has become a mainstream bath remodel request.
If that is the motivation, a few things are worth building in now rather than later:
- Blocking in the walls for grab bars, even if bars are not installed yet. Adding blocking during the project costs very little; adding it afterward means opening walls.
- A low or zero threshold entry, sized for the mobility you are planning for
- A bench or seat, either built in or a well designed removable one
- A handheld shower on a slide bar
- Lever handles and a pressure balanced valve
- Slip resistant floor material, which for tile means smaller tiles with more grout lines
- Door width and turning space in the room, if a wheelchair or walker is a consideration
Grab bars need to be anchored into blocking or studs. A bar fastened into tile and drywall alone is not a grab bar.
The Resale Question
Removing the only bathtub in a house is worth thinking about carefully. Buyers with small children frequently want at least one tub, and some agents consider a house without any bathtub a narrower sell.
If the house has more than one bathroom and a tub remains somewhere, this concern largely disappears. If it is the only tub, weigh how long you plan to stay against the market you would eventually sell into. Many homeowners quite reasonably decide their own daily use matters more than a hypothetical buyer.
One Day Bath Companies
The one day conversion category is heavily marketed and the product is usually acrylic panels over the existing surface or a new prefabricated surround. The speed is real, the disruption is genuinely minimal, and for many homeowners it is a good fit.
Two cautions. First, installing over existing surfaces means anything wrong behind them stays there, so ask what is done to inspect the substrate. Second, this category tends to be sold through in home appointments with same day pricing, and a price that expires when the salesperson leaves is a negotiating tactic. Such sales may carry a cancellation right, covered in the three day cancellation rule and in home remodel sales.
Get at least one quote from a conventional bathroom remodeler alongside any one day quote, so you know what the alternatives cost.
Timeline and Permits
A prefabricated conversion in the existing footprint can be a one to three day job. A tiled shower is generally one to two weeks including cure times, which cannot be rushed. Reconfiguration runs longer.
Plumbing changes typically require a permit. Like for like replacement often does not. Check locally, using the guidance in which home projects need a permit.
If you want quotes for a shower conversion or bath remodel, tell us about your home and we will connect you with contractors serving your area. It is free to use, with no obligation to hire.