Tub-to-Shower Conversion: Cost, Steps & Tips in the U.S. (2026)
A tub-to-shower conversion costs between $3,500 and $12,000 in the U.S. in 2026, with most homeowners spending around $6,500 for a mid-range job. A basic prefab shower stall can run $1,000–$2,800, while custom tile, walk-in designs and frameless glass push it past $4,000. The price depends mostly on materials, tile work and any plumbing changes. Here’s the breakdown, how to choose a base and the mistakes that drive up the cost.
Cost breakdown
| Item | Typical cost (USD) |
|---|---|
| Remove tub + repair walls/subfloor | $170 – $1,800 |
| Prefab shower stall kit | $350 – $4,100 |
| Custom tile (if chosen) | $900 – $10,000 |
| Total (mid-range) | ~$6,500 |
How to choose a shower base
- Prefab acrylic/fiberglass base or one-piece unit: cheapest and fastest, with a built-in slope; great for a clean, low-maintenance result.
- Solid-surface or cultured-marble base: can be cut to size, warm underfoot and easy to keep clean.
- Tiled base on a mortar/pan liner: the most custom look, but it must be waterproofed and sloped correctly by a pro.
Whatever you pick, choose a slip-resistant (textured) floor and, ideally, a low- or zero-threshold (curbless) base for safety and accessibility.
Steps involved
- Remove the old tub and surrounding tile or drywall.
- Repair any damaged studs or subfloor.
- Swap the drain: replace the 1½“ tub drain line with a 2“ shower drain line so it drains properly.
- Install new backerboard and a waterproof membrane on the walls and floor.
- Set the base or pan, perfectly level, and fit the shower valve.
- Tile the wet area (if custom), grout, and test for leaks before finishing.
- Install glass doors or an enclosure, and seal joints with neutral, mold-resistant silicone.
Mistakes to avoid
- Skimping on waterproofing: it’s the #1 cause of hidden leaks, rot and costly repairs downstairs.
- Over-cutting a prefab base: cutting where it isn’t designed to be cut ruins the built-in slope and traps water.
- Reusing the 1½“ tub drain: showers need a 2“ line to keep up with the flow.
- Sealing with the wrong caulk: use a neutral-cure, mold-resistant silicone, not a cheap acetic one.
- A slick base with no traction: in a bathroom, safety comes first.
Tips to get it right
- A curbless (walk-in) base is safer and more accessible.
- Prefab kits are cheaper and faster; custom tile costs more but looks high-end.
- Reuse tile outside the wet area to save on materials.
Frequently asked questions
How long does a tub-to-shower conversion take?
Usually 2–4 days, depending on tile work and any surprises behind the walls.
Can it be done without a full remodel?
Prefab one-piece units and liners are faster, but a properly waterproofed tiled shower lasts longer.
Do I need to move the drain?
Yes — a tub drain is typically 1½“; a shower needs a 2“ drain line, which usually means relocating and resizing it.
Does it add home value?
Yes — a modern walk-in shower is in high demand and improves resale appeal.
Do I need a permit?
Plumbing changes (like moving the drain) often require a permit — check with your local building department.