Tub to Shower Conversion Cost in 2026

What does a tub-to-shower conversion cost by type?

Source: This Old House’s 2026 guide, checked September 27. Its type table cites Homewyse and Home Depot estimates; the overall guide also uses a survey of 1,000 bathroom-renovation homeowners. That is not a survey of 1,000 identical tub conversions. These categories overlap, so do not add them together or treat their endpoints as a price ceiling.

How much does a walk-in shower cost?

Usually $5,000 to $12,000 when it replaces a tub, and more when the floor goes step-free. That is the published planning range in the table above. On San Francisco's permit record, the 101 tub-to-shower permits that mention a walk-in shower declared a median of $21,000, because most of them were part of a larger bathroom remodel.

The walk-in decision usually comes down to one comparison: a new tub in the old spot, or a shower in its place. A like-for-like tub swap keeps the drain and supply lines where they are. A walk-in shower usually moves at least one of them, and that change drives much of the price. If you are weighing a one-day system instead, see how the one-day bath remodel companies in California compare.

What do California permit records say a conversion costs?

More than the national guides, because the projects that pull permits tend to be bigger. San Francisco's building department records a declared cost on every permit, and since 2019 homeowners have filed 436 permits for tub-to-shower conversions inside a bathroom remodel on single-family homes and duplexes. On the 427 with a declared cost, the median was $25,000, and half landed between $14,500 and $30,000.

San Francisco Department of Building Inspection permit record via DataSF, single-family and two-family homes, descriptions naming a tub-to-shower or walk-in shower conversion, excluding permits that also mention a kitchen, an addition, an ADU, a new unit, a garage, a roof or structural foundation work. Accessed October 18, 2026. Compiled by The Renology.

Two things stand out. The median nearly doubled between 2019 and 2026, from $15,000 to $28,000, though not in a straight line, and the mix of projects shifts from year to year. And 2026 has already produced more of these permits than any full year before it. Declared costs are self-reported for permit fees, and a kit swap that leaves the plumbing alone may never appear in a permit record, so this describes the remodel end of the range. That makes it the right benchmark when a proposal includes new tile, moved plumbing or a step-free floor, which is where the next question comes in.

Why is one proposal thousands of dollars higher?

Begin with what the contractor agrees to deliver. A proposal for wall panels may omit the enclosure; another may include custom glass. An apparently complete price may include an allowance for a fixture that you have not selected. A second contractor may have priced a specific fixture and its installation.

Ask both contractors to return the same scope sheet. Then compare each line on the same basis: included, excluded, an allowance or unresolved. An allowance needs a quantity and a definition of what it covers, including any applicable delivery, tax or installation. “Tile included” is not enough information to compare.

A worked comparison: $6,000 versus $7,800

Illustrative example only. These are invented inputs to show how to compare scope, not market estimates or a customer project. Assume both proposals otherwise describe the same shower and finish.

In this example, B is $400 lower on the same known scope. Neither total includes an unknown repair unless the contract explicitly says so. An unresolved item stays marked unresolved. Do not enter zero just to finish the comparison.

Keep money for uncertainty separate from known exclusions. Our guide to renovation contingency shows how to track repairs, allowances and upgrades without counting an allowance twice.

Franchise or local contractor: compare the offer, not the label

A national brand and a local contractor may offer similar-looking showers with very different contracts. Either may use subcontractors or offer several finishes. Look beyond the name: the product, installation scope and written warranty tell you more about what you are buying.

Ask who contracts with you, who installs the system, who checks the plumbing and who handles a leak after handover. Compare the actual product warranty with the installation terms, including exclusions and the process for reporting a problem. A single contact is useful, but it is not evidence that every component and trade shares one warranty.

For a price described as a one-day conversion, ask whether that clock starts after products arrive and approvals are complete. Request two dates: when the bathroom becomes unavailable and when the shower can be used. Clarify whether glass, testing and final inspection are within the promised window.

What should be checked before you order materials?

Have the installer approve the base, drain location, valve and wall system together using model-specific drawings. Record who owns each measurement and purchase. A product can be the right nominal size and still be unsuitable for the planned finished opening or connection.

For custom glass, ask the fabricator when the opening can be measured and what must be finished first. Get the return policy and responsibility for an unsuitable owner-supplied item in writing. For a tile allowance, establish the area, waste allowance, trim and installation pattern before assuming a material price tells you the installed cost.

Do not interpret “water-resistant walls” as a complete waterproofing specification. Schluter describes a water test before setting tile and notes a typical 24-hour test period. The chosen assembly’s instructions, required curing time and local inspection requirements control the actual sequence. Ask who performs and records that test; this guide is not an installation procedure.

What happens if demolition reveals damage?

Agree on a pause-and-document process: photographs, a description of the affected area, proposed repair, itemized price and schedule effect. Ask which work must stop while you consider the change, and how any urgent temporary protection will be handled. Do not rely on a conversation that neither party records.

For California home-improvement contracts, CSLB explains that changes should be documented in a written change order signed before the changed work begins. Ask the contractor to explain the process in your agreement. A reserve gives you funding flexibility; it does not define what work is authorized.

California and Seattle: confirm the permit route

Los Angeles: LADBS identifies plumbing permits for installation or modification of drainage, waste, vent and water piping. Do not assume every conversion qualifies for an express permit or that a national cost guide establishes your fee. Ask the department or your licensed project team which approvals your exact scope needs. For the wider local context, see our Los Angeles bathroom planning guide.

Seattle: Public Health Seattle & King County says a permit is required when installing, relocating or changing a plumbing system. Confirm plumbing requirements with that authority and any building work with the relevant building department. Have the plumber determine the drain arrangement under the applicable code; the existing tub does not prove the new shower can reuse everything.

Accessibility: decide how the shower needs to work

A low threshold is one decision; usable access is a larger layout question. Discuss whether the shower needs to accommodate standing use, a seat, a transfer or a wheeled shower chair. Include approach space, controls, door movement, support locations and reach in the design discussion.

The US Access Board distinguishes transfer and roll-in shower arrangements. A single 36-by-36-inch dimension is not a universal wheelchair-accessible layout. Its ADA guidance is a reference for the standards it covers, not a determination that every private bathroom must follow the same rules. Ask a qualified designer and, where useful, an occupational therapist to assess the intended user and room.

Does Medicare pay, and where else can you check?

Do not budget for a remodel on the assumption that a doctor’s recommendation guarantees coverage. The Medicare Rights Center explains that home modifications are not covered through the durable medical equipment benefit. Ask your plan directly about any specific supplemental benefit, limits, approved providers and prior authorization.

Eligible veterans can check VA’s HISA program, which can assist with qualifying home improvements, including access to essential bathroom facilities. In California, DHCS lists Environmental Accessibility Adaptations among Community Supports. Eligibility and authorization are program-specific. Obtain written confirmation before ordering work; this is not a promise of reimbursement.

Keep a bathtub, or convert the only one?

Start with the household that uses the bathroom. A shower may solve a daily access problem; a tub may matter for children or other routines. If resale is a near-term concern, ask a local agent for comparable homes with the same bathroom count and buyer profile. We do not apply a universal resale percentage or claim that removing the only tub always reduces value.

What changes when the tub comes out?

A conversion replaces more than one fixture. The tub and its surround come out, and often the valve does too. A shower base or a site-built floor goes in, the walls get a waterproof finish, and a door or panel closes the opening. Each of those pieces gets checked at inspection, so it helps to know what an inspector looks at before comparing bids.

The City of Rancho Palos Verdes bathroom requirements handout is a useful example because it names the California code section behind each item. It cites the 2025 California codes and was updated in January 2026. Your city may word things differently, so use the list as questions for your own building department, not as your local rule.

The same handout says shower pan tests need 2 inches of water standing for at least 24 hours, and that the inspector must be able to reach the shower valves from outside the enclosure at final inspection. That second point affects where the valve and the fixed glass panel can go. It also notes that a permitted job can require other plumbing fixtures to be replaced under California's SB407 fixture rules, so ask whether an older toilet or faucet elsewhere in the house is part of the price.

California water limits for the new shower

California sets its own cap on showerhead flow. The California Energy Commission's Title 20 appliance efficiency regulations list a maximum of 1.8 gallons per minute at 80 psi for showerheads made on or after July 1, 2018. The Commission staff analysis for that rule describes the same 1.8 gpm second tier. The Rancho Palos Verdes handout applies the same number to new work: showerheads shall not exceed 1.8 GPM.

Two details matter when a conversion adds a rain head, a handheld or body sprays. The regulation's definition of a showerhead includes a body sprayer and a handheld showerhead. And showerheads with multiple nozzles are tested with all nozzles running at the same time. Ask the plumber to confirm that every head on the plan is a listed, compliant product before it is ordered.

For comparison, the EPA WaterSense program says standard showerheads use 2.5 gallons per minute and that WaterSense labeled models use no more than 2.0. In California the state cap of 1.8 is the stricter number, so a WaterSense label alone does not settle compliance here.

San Diego and San Francisco: when the conversion needs a permit

San Diego: the city's Information Bulletin 203 lists work that needs no building permit. That list includes tub-to-tub and shower-to-shower replacements that do not change the size or location of the fixture. Swapping a tub for a shower is not a like-for-like replacement in that wording, so ask Development Services which route applies. The bulletin allows a no-plan building permit for a bathroom remodel with no changes to structural elements, wall framing or exterior walls and no added plumbing fixtures. If the building is 45 years old or older, plans go through historic review unless the scope is exempt, and the bulletin says that review typically takes ten business days.

San Francisco: DBI says you need a permit before renovating and replacing bath fixtures. The online route is limited to work that does not remove or move walls. The same page lists a minimum valuation of $20,552 per bathroom under DBI's cost schedule, so the permit application may not use the lower contract price of a simple conversion. Final inspection for the bath permit cannot be scheduled until the related electrical and plumbing work has passed final.

Rancho Palos Verdes: the handout requires the permit before work starts, including demolition. Non-structural remodels can be processed over the counter with a permit application and existing and proposed floor plans.

Curbless entry and grab bars: what to build in while the walls are open

A conversion is often the only time the wall framing is exposed. The US Access Board guide to bathing rooms sets out details that are cheaper to plan now than to retrofit later. Its guidance covers facilities under the ADA standards, but the dimensions are a common design reference for homes too.

• Wall reinforcement. In dwelling units, the guide says grab bars are not required at showers if walls are properly reinforced for later installation. Backing installed during the conversion keeps that option open.
• Grab bar height and strength. The guide refers to grab bar heights of 33 to 36 inches and says bars and their mounting must withstand a 250-pound force.
• Threshold. At roll-in showers a threshold up to half an inch is permitted if beveled, and the guide notes that trench drains and similar designs allow a flush transition.
• Floor slope. It suggests a 1:48 maximum slope to the drain to control water without hurting access.
• Handheld spray. Accessible showers need a hand-held unit that can also be used in a fixed position.

Each of these affects the bid. A flush entry changes the floor build-up and the waterproofing area. Wall backing adds framing labor. A handheld with a slide bar changes the valve trim order. Put them in the scope sheet before pricing so every contractor quotes the same shower.

Resale: what the published numbers measure

No national report prices a tub-to-shower conversion on its own. The closest named source is the 2025 Cost vs Value report, which compares the cost of full remodel projects with the value they retain at resale.

For the Pacific region, the report lists the universal design project at $45,921 with 56.8% of cost recouped. These are whole-bathroom projects with new toilets, vanities, lighting and floors, so they do not price your conversion. They do show that, in this report, the project that replaced the tub with an accessible shower recouped a smaller share of its cost than the midrange remodel that installed a new tub. Project descriptions come from the report's midrange and universal design pages.

Homeowner behavior points the other way on demand. The 2026 U.S. Houzz Bathroom Trends Study, a survey of 1,619 homeowners, found a bathtub removed in 26% of renovation projects. When a tub came out, 79% used the space to enlarge the shower. A spacious shower was named a relaxing feature by 71%, against 26% for a comfortable tub. For how we weigh surveys like these against cost reports, see our methodology. Planning a wider project? Our bathroom remodeling overview covers the rest of the room.

Sources and Methodology

The price table is attributed to its publisher rather than presented as Renology transaction data. Manufacturer guidance supports the testing questions; government and program sources support the permit and funding sections. Reader discussions helped identify confusion about quote inclusions, but anonymous comments were not used to set prices or judge named contractors.

This revision removes unsupported local averages, blanket brand-price comparisons, a universal drain-size instruction and a one-size-fits-all accessibility dimension. A site assessment and written proposal still determine your scope. Use the handoff checklist below to turn that proposal into an ordering and completion record.