Short Answer
The most popular tub to shower conversion ideas are a low-threshold or curbless walk-in shower, a frameless glass panel, a recessed niche, a fold-down bench, grab bars, and a handheld showerhead. Some are purely cosmetic. Others, like curbless floors, linear drains, and moving the controls, need plumbing work, so plan those first.
Repipe Solutions is a licensed Houston plumbing company, and we install prefab shower kits, custom tiled showers, and low-threshold and curbless walk-ins. This list covers the ideas homeowners ask about most, and it marks which ones need a plumber and which ones do not, which most idea galleries skip.
Every conversion starts with the same piece of plumbing. A bathtub drains through a 1½-inch drain, while code requires a 2-inch drain for a shower, so the drain changes no matter which ideas you pick. In a home built on a concrete slab, that drain sits under the floor, which affects what some of the ideas below involve.
Which Conversion Ideas Need a Plumber?
| Idea | Plumbing Change? |
|---|---|
| Low-threshold walk-in | Yes, the drain is upsized and often moved |
| Curbless shower | Yes, drain work and a recessed floor |
| Linear drain | Yes, a new drain body and position |
| Controls moved to the entry side | Yes, the valve is relocated |
| Rain head or extra sprays | Yes, added supply lines |
| Handheld showerhead | Sometimes, depending on the valve trim |
| Recessed niche | No, but check for pipes in the wall first |
| Glass panel or door | No |
| Bench, grab bars, blocking | No |
| Tile, panels, or accent wall | No |
1. A Low-Threshold Walk-In Shower
Plumber needed. The simplest upgrade from a tub is a walk-in with a low curb, so you step over a few inches instead of a tub wall. A prefab base keeps the cost down, but its drain has to line up with the new 2-inch drain, so the old tub drain is upsized and often moved to match.
2. A Curbless, Zero-Entry Shower
Plumber needed. A curbless shower has no step at all, which makes it the safest option for aging in place and the easiest to roll a chair into. It is also the most involved. According to TileLetter, “a shower cannot be totally curbless unless the subfloor where the shower will be constructed is recessed,” so the floor drops below the bathroom floor to create the slope.
On a slab foundation, that means cutting and recessing concrete as well as moving the drain. It is routine work for a plumber who handles slab drain relocation, but it has to be planned from the start rather than added halfway through.
Our guide to the zero entry shower explains how the floor, slope, and drain come together on a slab.
3. A Linear Drain
Plumber needed. A long, narrow drain along one edge lets the whole floor slope in one direction, which suits large-format tile and curbless designs. Placement matters. Pro Remodeler notes that a linear drain should run wall to wall for a curbless shower, and that a drain at the entry handles about 5 gallons per minute, compared with 10 to 12 at the back wall. That limit matters if you also want several showerheads.
4. A Frameless Glass Panel Instead of a Door
No plumbing change. A single fixed glass panel keeps water in while leaving the entry open, and it makes a small bathroom feel larger because nothing blocks the view. A hinged frameless door gives more splash protection, and a curtain is the lowest-cost option. A fixed panel works best when the shower is deep enough to keep spray inside.
5. A Recessed Shower Niche
Usually no plumbing change. A niche set into the wall replaces bulky caddies and keeps bottles off the floor. Before choosing its spot, a plumber should confirm the stud bay is clear, because a niche cannot go where supply lines or a vent pipe run through the wall.
6. A Fold-Down or Built-In Bench
No plumbing change. A bench makes shaving and rinsing easier and adds a safe place to sit. A fold-down seat saves space in a tub-sized alcove. Either one needs solid backing in the wall, which is easy to add while the walls are open.
7. Grab Bars, or Blocking for Them Now
No plumbing change. Even if you do not want grab bars today, adding wood blocking behind the wall during the conversion means bars can be installed securely later. The ADA standards, written for public buildings but useful as a guide for homes, place horizontal grab bars 33 to 36 inches above the floor and require them to hold 250 pounds of force, including their fasteners and the wall behind them.
8. A Handheld Showerhead on a Slide Bar
Sometimes needs a plumber. A handheld lets you rinse while seated and makes cleaning the shower easier. The ADA benchmark is a hose at least 59 inches long that works both as a fixed head and by hand. Depending on your valve, adding one may need a diverter or new trim.
9. Controls at the Entry
Plumber needed. In a tub, the valve usually sits in the middle of the back wall. In a walk-in, moving the controls toward the entry lets you turn the water on and adjust it before stepping into the spray. That means relocating the valve, which is also the right moment to choose a better one.
New shower valves must provide anti-scald protection, either pressure-balancing or thermostatic. A pressure-balancing valve keeps the temperature steady when someone flushes a toilet, while a thermostatic valve holds an exact temperature you set. Either is required on a new installation, so a conversion is a natural time to upgrade.
10. A Rain Head or Body Sprays
Plumber needed. Extra heads mean extra supply lines and more water hitting the floor at once. A standard showerhead flows 2.5 gallons per minute, and an EPA WaterSense head uses no more than 2.0, so two or three heads running together can exceed what a small entry drain can carry. Plan the drain around the fixtures you want.
11. Large-Format Tile or an Accent Wall
No plumbing change. Large tiles mean fewer grout lines to clean, and an accent wall or bold pattern turns a plain alcove into a feature. For the floor, choose tile rated for wet areas. Manufacturer Crossville explains that the industry standard for floors walked on when wet is a dynamic coefficient of friction of 0.42 or greater, and smaller tiles with more grout joints add grip on a shower floor.
12. Tile, Acrylic, or Solid Surface Walls
No plumbing change. Tile offers the most design freedom. Acrylic panels go up quickly with no grout lines to maintain. Cultured marble and solid surface give a seamless stone look with little upkeep. Whatever is on the surface, what matters most is the waterproofing behind it: a membrane and mold-resistant backer behind tile, not just grout.
13. Better Ventilation
No plumbing change. A bigger, more open shower puts more moisture into the room, especially with a curbless floor. The Home Ventilating Institute recommends at least 1 cubic foot per minute of fan capacity per square foot of bathroom and running the fan for 20 minutes after a shower. The EPA advises keeping indoor humidity below 60%.
How Do You Make a Converted Shower Safe for Older Adults?
Falls are the main concern. The CDC reports that more than one out of four older adults falls each year. AARP’s aging-in-place checklist recommends a walk-in shower, a shower chair or bench, a handheld showerhead, and grab bars. Combine the ideas above, a low or zero threshold, a bench, grab bars or blocking, a handheld, slip-resistant floor tile, and controls you can reach from outside the spray, and the shower can work for decades.
Should You Keep One Bathtub in the House?
Usually, yes. The general appraiser advice is that a home should keep at least one bathtub. Converting a second bathroom’s tub into a walk-in shower is typically a good upgrade, but removing the only tub can narrow the pool of buyers, especially families with young children.
How Repipe Solutions Plans a Conversion
We start by checking what is under the tub, slab or framed floor, and where the drain and valve sit, because those decide which ideas are simple and which need more work. We handle the drain upsizing, valve, waterproofing, and permit, and we can recess a slab for a curbless shower or relocate a drain when the layout calls for it. For pricing, see our guide to tub to shower conversion cost.
Frequently Asked Questions
Can you convert a tub to a walk-in shower without moving the drain?
The drain always changes size, from 1½ inches to 2 inches. Whether it also has to move depends on where the new shower base puts its drain compared with the old tub drain.
Can you put a curbless shower on a concrete slab?
Yes, but the slab has to be recessed where the shower goes so the floor can slope to the drain without a step. That means cutting concrete, which should be planned at the start of the project.
What is the best conversion idea for a small bathroom?
A low-threshold walk-in with a fixed frameless glass panel keeps the space feeling open. A recessed niche and a fold-down bench add storage and seating without taking up floor space.
Do I need a new shower valve when converting a tub to a shower?
Often. If the valve moves or is replaced, the new one must provide anti-scald protection, either pressure-balancing or thermostatic, and a conversion is a good time to upgrade.
Does a walk-in shower need a door?
Not always. A fixed glass panel can keep water in if the shower is deep enough. Shallow showers or high-flow setups usually need a door to control splash.
Ready to Convert Your Tub to a Shower?
Repipe Solutions plans and builds tub-to-shower conversions across Greater Houston, from the drain and valve to the finished walls. Learn more about our shower and tub-to-shower services in Houston, or get in touch to talk through your layout.
Featured photo: “Tiled shower with handheld slide bar” by andrechinn via Openverse, licensed under CC BY 2.0, converted to WebP.