How a walk-in tub installation works, from first call to first bath

A walk-in tub project has four stages: the conversation, the measurement and plan, installation day, and the first weeks of use. Most of the stress families feel comes from not knowing what is next. This guide lays it out so you can plan around a parent's routine, a caregiver's schedule, or your own recovery from a surgery.

Stage 1: the first conversation

When you call 1-888-779-2284 or send the quote form, a specialist from Aging Safely Baths & More will ask questions about the person and the room. Expect questions like these:

• Who will use the tub, and how do they move today? Cane, walker, wheelchair, or no aid?
• What is the hardest part of bathing right now?
• Is the current bathtub in an alcove with walls on three sides? Roughly how long is it?
• Is the bathroom on the ground floor or upstairs? Is it a house, a condo, or a mobile home?
• Do you want jets, a heated seat, or a soaking-only model?
• Does the household already work with a licensed contractor?

Have a tape measure and a phone camera nearby. Photos of the tub, the faucet wall and the bathroom doorway make the conversation more accurate.

Stage 2: measurement and a written plan

Before anything is ordered, the space needs to be measured carefully: the tub opening, the height of the window if there is one over the tub, the width of every doorway and hallway on the path from the front door, and the location of the drain. Our measuring guide shows how to take these measurements yourself.

The plan should spell out the model, door direction, drain side, wall finish, electrical work and permit responsibility. In California, the person who does the installation work generally needs a contractor license from the Contractors State License Board for jobs above the small-job limit, and any job that needs a permit requires a license regardless of size. Look up the license number on the CSLB website before you sign. Our contractor guide explains what to check.

Stage 3: getting the house ready

• Clear a path from the front door or garage to the bathroom. Move rugs, small tables and anything fragile.
• Empty the bathroom: towels, bath mats, shower caddies, toiletries, the medicine cabinet if it is near the work.
• Arrange parking close to the door for the delivery and work vehicles. In dense neighborhoods this can take planning.
• Secure pets in a closed room.
• In a condo or HOA community, confirm any approvals, elevator reservations and working-hour rules with the association.
• Plan where the person will bathe on install day and, if needed, the day after.

Stage 4: installation day

1. Protecting the home. The crew lays floor protection along the path and in the bathroom.
2. Shutting off water and removing the old tub. Fiberglass and steel tubs usually come out whole. Heavy cast-iron tubs may be broken up on site.
3. Checking what was hidden. With the old tub out, the installer looks at the subfloor, framing and pipes. If there is water damage or rotted wood, they should stop and talk with you about it before continuing.
4. Rough plumbing and electrical. The drain and supply lines are connected or adapted. If the tub has jets or a heater, a GFCI-protected circuit is connected.
5. Setting and leveling the tub. A walk-in tub must sit perfectly level for the door seal to work. This step takes care.
6. Walls and finish. A surround or wall panels are installed above the tub, trim is fitted, and seams are sealed.
7. Water test. The tub is filled and drained to check the door seal, the drain and the jets.
8. Walk-through. The installer should show the person who will use the tub how to open and close the door, run the controls and clean the jets.

For many straightforward swaps, all of this fits into one day. That is the case Aging Safely Baths & More refers to with its one-day installation. If the house needs a new circuit run from a distant panel, plumbing moved through a slab, significant wall repair or a separate inspection visit, the project may take longer. A good installer tells you which kind of job yours is before work starts.

Permits and inspections

California's building, plumbing and electrical codes are adopted statewide in Title 24 and then enforced by each city or county building department, which sets its own permit process and fees. A like-for-like replacement may be handled differently from a job that adds a circuit or moves a drain. When a permit is required, an inspector may need to see the work. Ask the installer to explain what your local department requires.

Two California-specific details can come up during a bathroom project. First, if a tank water heater is replaced to handle the deeper fill, state law requires it to be braced or strapped against earthquakes. Second, when a single-family home gets a permit for alterations, California law requires older high-flow plumbing fixtures to be replaced with water-conserving ones before final approval. We explain both in our older homes guide.

The first few weeks

• Practice with someone nearby. The first few baths should happen with a family member or caregiver in the home, so the person can learn the routine calmly.
• Use the order every time: step in, sit, close and latch the door, then fill. Drain fully before opening the door.
• Keep a towel or robe within reach for the drain time.
• Learn the jet cleaning routine if the tub has jets. Follow the manufacturer's instructions.
• Check the door seal visually now and then, and call if you see water outside the tub.

If you are using your own contractor

Some California families have a licensed contractor they already trust. In that case, ask whether the tub can be delivered without installation. Your contractor should have the manufacturer's installation instructions before the tub arrives, confirm the drain side and rough-in, and plan the electrical work. Ask exactly where the tub will be dropped off, and make sure your contractor has enough help to carry it into the house.