Tub to Shower Conversion Cost: 2026 Prices by Tier, Drain and Timeline

A tub to shower conversion cost typically runs $2,000 to $12,000, per This Old House’s 2026 survey, with prefab kits at the low end and tiled curbless builds reaching $15,000.

How much does a tub to shower conversion cost in 2026?

A tub to shower conversion usually costs $1,500 to $12,000 in 2026, depending on the shower type and how much plumbing moves. HomeAdvisor reports a $3,000 average and a $1,500 to $8,000 normal range. Fixr reports a $4,000 average, and This Old House’s 2026 survey found $2,000 to $12,000, with curbless builds up to $15,000. Curbless builds raise the stakes on waterproofing, which is why pan quality matters so much; see shower pan leak signs and testing before finalizing your layout.

The big cost guides disagree on the middle because they measure different job mixes. Fixr notes that high-end materials with custom installation can reach $20,000.

If you have not settled on giving up the tub yet, our shower vs bathtub comparison covers water use, cleaning and daily convenience. This page assumes the decision is made and focuses on price.

What does each tub to shower conversion tier include?

Conversions fall into four tiers: a prefab acrylic or fiberglass kit, a tiled walk-in with a curb, a curbless (zero-threshold) shower, and an accessible build sized and equipped for limited mobility. Each step up adds labor, waterproofing and glass. The table below lines up sourced price ranges with what you actually get at each tier.

Bars show the midpoint of each range from This Old House’s 2026 tub-to-shower cost survey ($4,000, $8,500, $9,000 and $11,500). Labels show the full range.

What drives the cost to remove a bathtub and install a walk-in shower?

Plumbing changes, the shower base, wall finish and glass drive most of the cost to remove a bathtub and install a walk-in shower. Removal itself is cheap, about $300 on average per Fixr. Moving the drain, replacing the valve and adding frameless glass can each add $700 to $3,000, and hidden rot behind the old tub adds more.

Moving the drain is the line that swings budgets the most. On a slab foundation, the plumber may have to cut and trench concrete to reach the trap. Over a crawlspace or basement, the work is usually simpler. Our guide to bathroom remodel plumbing explains when a drain can move a few inches and when it means opening the floor.

The valve matters too. A tub spout and diverter come out, and most conversions add a new pressure-balancing or thermostatic valve set at shower height.

Waterproofing is the cost line homeowners skip at their peril. Prefab bases and walls are waterproof as installed. A tiled shower needs a continuous membrane (sheet or liquid-applied) under the tile, because grout and tile are not waterproof. This Old House lists hidden costs such as water damage and subfloor repair found once the old tub comes out.

Why does a tub to shower conversion often need a bigger drain?

A tub to shower conversion often needs a bigger drain because tubs commonly use a 1-1/2 inch trap while most shower bases ship with 2-inch outlets. The International Plumbing Code allows a 1-1/2 inch shower trap only when total flow is 5.7 gpm or less, and the Uniform Plumbing Code used in many Western states calls for 2 inches.

The rule sits in IPC Table 709.1, which rates a bathtub and a standard shower at 2 drainage fixture units each. A shower with combined flow above 5.7 gpm and up to 12.3 gpm rates 3 fixture units and needs a 2-inch trap. Add a rain head and body sprays, and you cross that line fast.

The practical reason is speed. A tub holds water behind its own tall wall, so a slow drain is an annoyance. A shower pan has a curb of a few inches or none at all, so a slow drain floods the bathroom floor. Upsizing usually means replacing the trap and a short run of drain pipe, which is part of why This Old House prices drain work at $900 to $1,100.

The drain style also changes the price. Center drains are the cheapest. Linear drains cost more but let a curbless floor slope in one direction. Our breakdown of types of shower drains compares point, linear and tile-in options and their installed cost.

What happens during a tub to shower conversion, step by step?

A tub to shower conversion follows a fixed order: demolition, rough plumbing, inspection, framing and waterproofing, the base and walls, then trim and glass. Skipping the inspection or rushing waterproofing is how leaks start. Here is the typical sequence a contractor runs on a standard 60-inch alcove tub.

1. Shut off water and protect the room. The crew covers the floor and vanity and sets up dust control.
2. Demolish the surround and pull the tub. Steel and acrylic tubs come out whole; cast iron is often broken up with a sledge.
3. Inspect the subfloor and studs. Rot or mold found here gets fixed before anything new goes in.
4. Rough in the plumbing. The plumber resizes or moves the drain and trap, replaces the valve and raises the shower head outlet.
5. Pass the rough-in inspection. In many jurisdictions, an inspector checks the drain, trap and valve before walls close.
6. Frame, board and waterproof. Add blocking for grab bars and glass, hang cement or foam board, and apply the membrane. Many installers flood-test the pan before tile goes on.
7. Set the base and walls. Install the prefab pan and panels, or float the mortar bed and set tile.
8. Trim out and install glass. Set the valve trim, shower head and drain grate, then measure and install the door once tile is grouted.

How long does a tub to shower conversion take?

A tub to shower conversion takes about two days for a prefab kit and one to two weeks or more for custom tile. Fixr cites two days for prefab and one to two weeks for custom work. HomeAdvisor lists one to three days, and This Old House puts typical professional jobs at three to seven days.

Custom glass is the usual reason a tiled job stretches. Installers measure for frameless glass after tile is set, and fabrication can add a week or more depending on the shop. Inspections and cure time for mortar and grout add days as well.

Will removing a bathtub hurt resale value?

Removing a bathtub rarely hurts resale value if the home keeps at least one tub elsewhere. Designer and stager Kristie Barnett told the National Association of Realtors’ Realtor Magazine that there “absolutely has to be at least one bathtub in any condo or home.” This Old House gives the same advice for families with young children.

The NAR piece identifies two buyer groups who care most: young families with small children and luxury buyers with multiple bathrooms. Appraiser Jonathan J. Miller described a tub as one more amenity that widens a home’s appeal. Converting a hall bath in a three-bedroom house is the riskiest move. Converting a primary bath while a hall tub stays is the common, low-risk play.

If you are keeping a tub in another bathroom and want to refresh it too, our guide to types of bathtubs compares alcove, drop-in, freestanding and walk-in models by size and installed cost.

Who benefits most from a walk-in or curbless shower?

Older adults, people with limited mobility, and anyone planning to age in place benefit most from a walk-in or curbless shower. Stepping over a tub wall is a fall risk. CDC researchers found 37.3% of nonfatal bathroom injuries happened while bathing, showering or getting out of the tub or shower, and injury rates climbed steeply with age.

The CDC’s 2011 MMWR report estimated 234,094 nonfatal bathroom injuries among people 15 and older treated in emergency departments in 2008. The rate for people 85 and older was 515.3 per 100,000, against 58.8 per 100,000 for ages 15 to 24. Falls caused 81.1% of the injuries.

• Low or zero threshold. A curbless entry removes the step entirely and allows a shower wheelchair to roll in.
• Grab bar blocking. Solid wood blocking in the walls costs little during the remodel and a lot to add later.
• Handheld shower on a slide bar. It lets a seated bather or a caregiver control the spray.
• Bench or fold-down seat. Fixr lists a bench at $100 to $500.
• Slip-resistant floor. Small mosaic tile gives more grout lines and better grip than large format tile.

Private homes do not have to meet the ADA, but the 2010 ADA Standards are a useful template. They set a transfer shower at 36 by 36 inches and a standard roll-in shower at 30 by 60 inches minimum. HomeAdvisor prices a 36 by 36 inch ADA-size stall at $1,300 to $5,500.

How can you keep a tub to shower conversion cost down?

Keeping the drain where it is, choosing a prefab base and walls, and picking a framed or sliding glass door are the three biggest ways to hold down tub to shower conversion cost. Each choice avoids a line item that can run $700 to $3,000 on its own, according to This Old House and Fixr pricing.

• Fit the alcove. A 60 by 30 or 60 by 32 inch shower base drops into the old tub footprint without moving walls.
• Reuse the drain location. Many prefab bases offer an end or center drain to line up with the old tub drain, though the pipe may still need upsizing.
• Get three quotes with line items. Ask each contractor to price removal, plumbing, permit, base, walls and glass separately so you can compare.