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Boise Bath — bathroom remodeling in Boise and the Treasure Valley

Walk-in tubs · Boise & the Treasure Valley

Replacing a bathtub with a walk-in tub: what the project really involves

Replacing a bathtub with a walk-in tub means removing the old tub, adapting the drain and supply lines for the tub’s built-in filler and fast-drain system, running a dedicated GFCI-protected circuit for the pump and heater, setting and door-testing the tub, and rebuilding the walls around it. Most installations take two to four days and need plumbing and electrical permits.

Price my walk-in tub →Is my bathroom ready?

Idaho licensed · RCE-66817023-year workmanship warranty

Rendering of a white walk-in bathtub with its low door open and jet ports inside, under a window in a tiled bathroom
Illustrative design concept, not a finished bathroom
  • 2–4 daysTypical install
  • 2 permitsPlumbing + electrical
  • 60 inchesThe alcove most models fit

Inside the alcove

Six things change when the old tub comes out

Demolition is the same as any tub swap. Everything after it is different, because a walk-in tub is taller, fills and drains through its own systems, and is usually an electrical appliance.
Schematic of a walk-in tub set into a bathtub alcove, numbered at the door seal, the filler and supply lines, the drain, the dedicated electrical circuit, the rebuilt walls above the rim and the grab bar blockingservice accessto panelold tub rim123456
Schematic, not to scale.
  1. 1

    The door and its seal

    Most walk-in tubs use an inward-swinging door that water pressure presses tighter as the tub fills. Makers like Kohler are explicit that an out-of-level install can distort the frame and break the seal, so the tub is set dead level and fill-tested before a wall closes.

  2. 2

    Filler and supply lines

    The old wall spout and valve are abandoned. Supply lines are re-routed to the tub’s own deck-mounted filler and handheld shower.

  3. 3

    The drain

    The waste line connects to the tub’s drain assembly, often a powered fast-drain system that empties the tub in a fraction of gravity time.

  4. 4

    A dedicated GFCI circuit

    Jets, heaters, heated seats and drain pumps all run on power, and the National Electrical Code (NFPA 70) requires hydromassage equipment on GFCI-protected circuits that stay accessible for service. It is permitted electrical work, not a borrowed outlet.

  5. 5

    Walls rebuilt above a taller rim

    A walk-in tub stands taller than the tub it replaces, so the old surround never survives. Waterproofed walls go back up above the higher rim, with the tub’s service side left accessible.

  6. 6

    Blocking for grab bars

    With the walls open, solid blocking goes in exactly where anchored grab bars will land. It is the cheapest moment in the project to add it.

The part the ads skip

The door seals shut, so you sit in the tub while it fills, and again while it drains.

Several minutes each way, in a cooling room if the heater is undersized. Fast-drain pumps and heated seats exist precisely to shorten and soften that wait.

Drain speed belongs near the top of the feature list. What to look for in a walk-in tub covers the rest.

Is your bathroom ready?

Four questions that decide the scope

Each answer becomes a line on your consultation checklist, so the electrical and hot-water questions get asked before a tub is ordered, not after it arrives.
  1. 1Is the tub coming out a standard 60-inch alcove tub?
  2. 2Do you want jets, an in-line heater, a heated seat or a fast-drain pump?
  3. 3Do you know how big your water heater is?
  4. 4Will the person using it genuinely soak, for comfort, arthritis or circulation?

Your consultation checklist

Answer the questions and this fills in with what your bathroom will need checked, so none of it is a surprise on the day.

How the install goes

Two to four days, in eight steps

Most replacements take two to four days. A subfloor repair, a panel upgrade or a water heater shortfall adds time, which is why the first step is an assessment.
  1. 01

    Assess the bather, the bathroom, and the house systems

    The contractor matches tub models to the user’s mobility and the alcove dimensions, and checks the two systems that decide feasibility: water heater capacity against the tub’s fill volume, and panel capacity for the dedicated circuits.

  2. 02

    Select the tub and lock the rough-in specs

    Door swing, seat height, drain speed, and feature package are chosen, and the manufacturer’s plumbing and electrical rough-in requirements are mapped onto the existing alcove before demo.

  3. 03

    Remove the old tub and open the alcove

    The old tub and enough of its surround come out, and the exposed framing, subfloor, and drain are inspected — soft spots get repaired now, because the new tub needs perfectly solid, level bearing.

  4. 04

    Rough in plumbing and electrical

    Supply lines are re-routed to the tub’s filler connections, the waste line is adapted to its drain system, and the electrician runs dedicated GFCI-protected circuits to the tub location — followed by the rough-in inspections.

  5. 05

    Set the tub dead level and anchor it

    The tub is placed, leveled to the manufacturer’s tolerance so the door seal is not distorted, anchored, and connected to water, drain, and power.

  6. 06

    Fill-test the door seal before closing anything

    The tub is filled to operating depth and the door, drain, and every connection are checked under real pressure — the one moment a seal problem is cheap to fix.

  7. 07

    Rebuild the walls and finish the safety details

    Waterproofed walls go up above the new rim with the service access preserved, grab bars anchor into fresh blocking, and the handheld shower and trim are installed.

  8. 08

    Final inspections and owner walkthrough

    Plumbing and electrical finals close the permits, and the installer walks the user through the door latch, controls, fast drain, and safety features until they are second nature.

What it costs

$2,000 to $20,000, and why the spread is so wide

HomeAdvisor and Angi put an installed walk-in tub at roughly $2,000–$20,000 nationally, with most projects between $5,000 and $10,000. Two things set where yours lands: the tub’s feature tier, and how much the bathroom has to change to receive it.
  • Labor for a straightforward swap: $700–$3,000 nationally, per Angi, when the existing plumbing is reused.
  • Budget it as yours: original Medicare generally does not cover walk-in tubs, a limitation AARP’s home-modification guidance highlights.

National planning ranges. Boise Bath does not publish a walk-in tub price; yours is fixed in writing after the consultation. Full cost breakdown →

Basic soaker

$2,000–$5,000

Watertight door, built-in seat, grab bars — no jets

Air-jet or whirlpool (hydrotherapy)

$5,000–$10,000

Air or water jets, pump, usually an in-line heater

Combination air + water jets

$7,000–$15,000

Both jet systems, heated seat and faster-drain options common

Bariatric / wheelchair-accessible

$5,000–$10,000+

Wider door and seat, higher weight rating, outward-swinging door on transfer models

National unit-only ranges per HomeAdvisor and Angi cost guides. Installation, electrical, and hot-water work are additional — see the sections below. Bars drawn on a $0–$15,000 scale.

A finished Caldwell walk-in shower with a full-width tiled bench, grab bars, a long niche and a handheld shower head
Caldwell Accessible Shower: tiled walk-in shower with a full-width bench and grab bars. Built by Iron Crest Remodeling Group.

Before you commit

If nobody will really soak, look at a walk-in shower

A walk-in tub earns its trade-offs for people who genuinely bathe seated. A curbless shower is faster, has no fill-and-drain wait, and handles wheeled mobility aids better. Both can be built into the same alcove.
Walk-in tub vs. walk-in showerReplacing a tub with a shower

Walk-in tub installation

Get a fixed price for your walk-in tub

Book a free in-home consultation. We measure the alcove, talk through door style, drain speed and features, and check the electrical panel and water heater against the tub you want before giving you a written price.

  • A fixed, written price after a free in-home consultation
  • 3-year workmanship warranty
  • Licensed Idaho contractor RCE-6681702
  • A reply within one business day, Monday to Friday

Rather talk it through? Call (208) 775-8999

Price your walk-in tub

Name, phone and project. We reply within one business day.

Licensed Idaho contractor · RCE-6681702 · Fully insured · We reply within one business day (Mon–Fri).

Questions

Walk-in tub questions, answered

How long does it take to install a walk-in tub?
Most replacements run two to four days: demo and inspection, plumbing and electrical rough-in, setting and fill-testing the tub, then rebuilding the walls. Discovering a subfloor repair, a panel upgrade, or a water heater shortfall adds time — which is why a thorough pre-install assessment matters more here than in a standard tub swap.
Do walk-in tubs require electrical work?
Almost always. Jets, air systems, inline heaters, heated seats, and fast-drain pumps all run on power, and the National Electrical Code requires hydromassage bathtub equipment on GFCI-protected circuits. Plan on at least one dedicated circuit from the panel and an electrical permit alongside the plumbing permit. Only a bare-bones soaker with no powered features avoids it.
Do you really have to sit in the tub while it fills and drains?
Yes — the door seals shut, so you enter before filling and exit after draining, several minutes each way. Manufacturers address it with fast-drain pumps, heated seats, and quick-fill valves, which is why drain speed belongs near the top of your feature checklist. Any assessment of walk-in tubs that skips this trade-off is not an honest one.
Will a walk-in tub fit where my bathtub is now?
Usually. Most walk-in tubs are deliberately sized for the standard 60-inch alcove a builder-grade tub occupies. The walls still change — walk-in tubs are taller, so the surround gets rebuilt above the new rim — and the plumbing and electrical are adapted to the tub’s systems, but the footprint itself rarely forces layout changes.
Does Medicare pay for a walk-in tub?
Generally no — original Medicare does not treat walk-in tubs as covered durable medical equipment, a limitation AARP’s home-modification guidance highlights. Some Medicare Advantage plans, veterans programs, and state assistance programs offer partial help, but plan your budget assuming the cost is out of pocket and treat any coverage you secure as a bonus.
Is a walk-in tub or a walk-in shower better for aging in place?
It hinges on bathing habits and mobility. A walk-in tub suits people who genuinely soak — for arthritis, circulation, or preference — and can sit and stand from a built-in seat. A curbless shower is faster, has no fill-and-drain wait, and handles wheeled mobility aids better. Our walk-in tub vs. walk-in shower comparison covers the trade-offs in full, and an honest contractor will walk you through both.

By Boise Bath · Updated September 12, 2026

Sources

National figures come from the sources above and are general guidance; your bathroom is priced at the consultation, not on this page. Images marked as an illustrative concept are design renderings, not finished work. Photographs credited to Iron Crest Remodeling Group are real completed bathrooms.

Keep planning

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