How to Change Out a Bathtub During a Bathroom Renovation?

Changing out a bathtub during a bathroom renovation involves disconnecting the plumbing, removing the old bath carefully, checking the surrounding structure, preparing waterproofed surfaces, and installing the new tub in the correct position. Planning the work as part of the wider renovation helps prevent damaged tiles, plumbing problems, poor drainage, and water getting behind the new bath.

How Do You Change Out a Bathtub?

Changing out a bathtub requires disconnecting the waste and overflow plumbing, lifting the bath from its alcove or freestanding position, completing the waterproofing and tiling work in the space it leaves, and then installing the replacement bath or shower configuration.

Each stage is different. The plumber handles the disconnection and the final plumbing connection to the new bath. The builder or demolition trade manages the physical removal. The waterproofer works the substrate before tiling. The tiler completes the wall and floor surfaces. A licensed builder coordinates all of these and ensures the right compliance certificates are issued at each regulated stage.

Trying to remove and replace a bathtub as a single DIY task is not practical in Victoria. The plumbing work is regulated and requires a licensed plumber. The waterproofing requires inspection before tiling. The project is most efficiently managed as a sequenced renovation job under a single builder.

When to Replace vs Remove the Bathtub?

Before any work starts, the homeowner needs to decide whether the existing bath is being swapped for a new one or whether the whole bath is being removed and replaced with a shower.

Replacing with a New Bathtub

Replacing one bath with another is the simpler option. If the new bath sits in the same alcove and connects to the same waste and overflow positions, the structural and tiling work is minimised. The old bath comes out, the substrate is assessed and waterproofed where needed, and the new bath drops into the same footprint.

This approach suits households that want to keep a bath, upgrade the model, or address damage to the existing unit without changing the room’s layout. It is common in Melbourne family homes where the bath is used regularly and removing it would reduce the home’s market appeal.

Converting the Space to a Shower

Removing the bath and converting the alcove to a shower is one of the most requested changes in Melbourne bathroom renovations. The bath footprint typically provides enough space for a full shower recess with a frameless screen, a large shower base or tiled floor, and a comfortable head height.

Converting the alcove from a bath to a shower changes the waterproofing requirements, the floor waste position, and the wall tile layout. The drain must be repositioned to the centre or edge of the new shower floor, which involves opening the subfloor to relocate the waste connection. This is how to renovate a shower within the same footprint as an existing bath, and the sequencing follows the same steps as any shower installation.

The Bathtub Removal and Replacement Process

The removal and replacement of a bathtub follows a defined sequence. Each step depends on the previous one being completed correctly.

1. The licensed plumber disconnects the waste trap and overflow connection beneath the bath and caps the supply and waste lines so the space can be worked in safely.
2. The builder or demolition trade removes the bath from the alcove. Acrylic and fibreglass baths are typically cut into sections. Cast iron baths are removed whole and require two people given the weight.
3. The wall and floor substrate behind and beneath the bath is exposed and assessed. Water damage, deteriorated sheeting, or compromised structural framing is addressed at this point before any new surfaces go on.
4. The licensed waterproofer applies a membrane to all wet area surfaces, including the floor and any wall sections that will be tiled. This step requires inspection and sign-off before tiling begins.
5. The tiler completes the floor and wall tiling in the new configuration, including the base if a tiled shower is replacing the bath.
6. The licensed plumber returns to connect the waste and supply lines to the new bath or shower base, install tapware, and issue the plumbing compliance certificate.

A useful overview of the full bathroom renovation steps and where each trade fits in the sequence covers how each stage connects to the next.

Asbestos: What Melbourne Homeowners Must Check Before Demolition

In Melbourne homes built before 1990, asbestos-containing materials are commonly found in walls and floors that were concealed behind or beneath the bathtub.

The fibrous cement sheeting used behind tiles in bathrooms built through the 1970s and 1980s was frequently manufactured with asbestos content. Removing the bath exposes this material. If it is disturbed without proper precautions, asbestos fibres become airborne and create a serious health risk.

According to WorkSafe Victoria’s asbestos guidance, asbestos is still found in more than 3,000 different building products, and all removal work must be carried out by a licensed asbestos removalist.

Before any demolition or bath removal work begins on a home built before 1990, the builder should confirm whether an asbestos inspection has been carried out. If the bathroom walls or floor have not been previously tested, testing before demolition is the correct step, not a precaution to skip.

The demolition phase of a bathroom renovation covers what to check for and in what order before any bathroom structure is taken apart, including how asbestos obligations are managed in older Melbourne properties.

Waterproofing and Tiling After the Bath Comes Out

The space left by a removed bathtub is almost never ready to tile straight away. The substrate needs assessment and waterproofing before any surface material goes on.

The key requirements at this stage are:

• The fibrous cement sheet or tile backer behind and below the bath position must be intact, dry, and structurally sound before waterproofing is applied. Damaged or moisture-affected sheeting is replaced first.
• The floor waste position is confirmed and adjusted if the shower footprint requires a different drain location.
• The licensed waterproofer applies membrane to the floor and all wall surfaces in the wet zone. The membrane must cure fully before tiling and requires inspection.
• Wall and floor tiles are laid over the inspected membrane, grouted, and silicone-jointed at all internal corners.
• Rectifier tiles or matching wall tiles that blend with the rest of the bathroom are sourced before tiling begins, not after.

Material selection needs to happen before the waterproofer and tiler arrive, not while they are on site. Delays caused by sourcing tiles mid-project are one of the most common reasons bathroom renovations run longer than the quoted timeline.

Which Trades Are Involved in Changing Out a Bathtub?

Changing out a bathtub involves a minimum of four separate licensed trades, each with a specific scope that cannot be covered by the others.

The trades involved in a bathroom renovation covers each trade’s responsibilities in detail, but the specific sequence for a bathtub change-out is: licensed plumber for disconnection and later reconnection, builder or demolition trade for the physical removal, licensed waterproofer for the substrate membrane, tiler for floor and wall surfaces, and licensed plumber again for final connection and compliance certification.

The licensed electrician is also involved if the heated towel rail, exhaust fan, or any lighting is being changed as part of the project.

In Victoria, using the VBA’s practitioner search allows homeowners to confirm that any plumber, waterproofer, or builder engaged for the work holds a current licence before any agreement is made.

Does Removing a Bathtub Affect Your Home’s Value?

Removing a bathtub can affect home value positively or negatively, depending on whether the property still has at least one bath elsewhere, the quality of the shower conversion installed in its place, and what buyers in that suburb and price bracket expect.

In most Melbourne homes, removing the only bath and replacing it with a shower reduces the property’s appeal to families with young children, which is a significant buyer segment in the eastern suburbs. If the property has a second bath in another bathroom, this concern is reduced.

A well-executed shower conversion in a property that retains a second bath often adds value, because it brings a dated bathroom into line with current expectations and removes the ongoing maintenance that comes with an ageing acrylic or cast iron bath.

Whether bathroom renovations add value to a Melbourne property depends on the scope of the renovation and how well it matches the standard that buyers in that price range expect at inspection.

Ready to Start Your Bathroom Renovation in Melbourne?

YoungConstruct manages bathroom renovations in Melbourne including full bathtub removal and replacement, bath-to-shower conversions, and complete bathroom gut renovations across Melbourne’s eastern suburbs.

We coordinate every trade in the correct sequence, manage waterproofing inspections, and issue a written scope and quote before any work begins.

Call 0428 400 258 or contact us through the website to book your free consultation and on-site quote.

Final Thoughts on Changing Out a Bathtub

Changing out a bathtub during a bathroom renovation is a multi-trade project that requires the right sequence of licensed work, not just a physical removal and a replacement dropped into the same spot.

The waterproofing, the asbestos check in older homes, the plumbing compliance, and the tiling all follow a defined order. Getting that order right is what determines whether the finished result is compliant, watertight, and built to last.

A licensed builder coordinating all trades from disconnection through to final certification is the most reliable way to manage the project from start to finish.