Planning a bathroom renovation is exciting, but once demolition begins, many homeowners are surprised by just how much has to happen before the new tiles, vanity and tapware finally go in.
A bathroom renovation isn't simply a case of ripping out the old bathroom and installing the new one. There is a sequence of demolition, plumbing, electrical work, preparation, waterproofing, tiling and fit-off that needs to happen in the right order — with different trades often relying on the work completed before them.
Understanding that process before your renovation begins can make the whole experience far less confusing. It helps you understand why certain decisions need to be made early, why there may be days when very little appears to be happening, and why changing your mind halfway through the renovation can sometimes have a much bigger impact than expected.
Knowing the order of works is one thing, but homeowners also want to know how long they'll actually be without their bathroom. Our bathroom renovation timeline explains how long the major stages can take and what can cause delays.
After being involved in 500+ bathroom renovations, one thing we've seen repeatedly is that homeowners have a much easier renovation experience when they understand what is happening behind the scenes — not because they need to manage the trades themselves, but because they know what to expect.
So, what actually happens once your old bathroom starts coming apart?
Before Step 1 — The Planning Happens First
Before anyone picks up a demolition hammer, ideally the major decisions have already been made.
Your bathroom layout should be established, fixtures and fittings selected or at least confirmed, tile choices considered, electrical requirements discussed and any significant changes to plumbing locations identified.
This is also the stage where you want to understand exactly what is included in your renovation quote and what isn't.
Leaving major decisions until after demolition can create delays, additional costs and variations that could potentially have been avoided with better planning.
A good bathroom renovation doesn't really begin with demolition. It begins with decisions.
Step 1: Demolition — The Old Bathroom Comes Out
This is the stage where your bathroom suddenly stops looking like a bathroom.
Existing fixtures, cabinetry, shower screens, tiles and other finishes are removed so the renovation can begin. Depending on the project, wall or floor linings may also need to be removed to expose what is underneath.
And this is where renovations can sometimes reveal their first surprise.
Until an existing bathroom is stripped out, there are things your renovator simply cannot see. Water damage, deteriorated flooring, previous waterproofing issues, unusual plumbing, damaged wall framing or questionable work from an earlier renovation may only become visible during demolition.
This doesn't mean something will necessarily go wrong. It simply means there is a difference between what can reasonably be assessed before demolition and what becomes visible once the room is opened up.
It's one of the reasons having a contingency allowance in your renovation budget is so important.
What should already be decided by this point?
Ideally, you shouldn't be standing in your newly demolished bathroom trying to decide where the vanity is going.
By demolition, the major layout decisions should already be resolved, particularly if you're moving plumbing or changing the position of fixtures.
The earlier these decisions are made, the easier it is for your renovator and trades to plan the work that follows.
Homeowner tip: Take photos before and during demolition. They can be useful later for remembering where services run behind walls and floors, as well as keeping a record of the renovation.
Step 2: Plumbing & Electrical Rough-In
Once the bathroom has been stripped back, the plumbers and electricians can begin preparing the services for the new bathroom.
This stage is often called the rough-in or first fix.
The plumber positions or alters the water and waste services required for things such as the shower, bath, vanity, basin and toilet. The electrician prepares wiring for lighting, exhaust fans, power points, heated towel rails, underfloor heating or other electrical features included in the design.
A lot of this work will eventually disappear behind walls, floors and tiles — but getting it right now is critical.
Moving Fixtures Can Mean More Work
Keeping fixtures in similar locations can sometimes simplify a renovation, while moving a toilet, shower, bath or vanity may require plumbing and drainage to be altered.
That doesn't mean you shouldn't change your layout.
Sometimes moving fixtures creates a dramatically better bathroom and is absolutely worth doing. But homeowners should understand that moving something isn't always as simple as drawing it in a different position on a floor plan.
Drainage locations, floor construction, wall construction, access to services and existing plumbing can all influence what is practical and what additional work may be required.
This Is Not the Time to Change Your Mind
Imagine the plumber has prepared the pipework for your wall-mounted basin mixer and then you decide you'd actually prefer a standard mixer mounted on the vanity.
What sounds like a small product change can affect plumbing positions, wall preparation and potentially other work that follows.
The same applies to electrical items.
Power point locations, mirror cabinets, wall lights, heated towel rails and underfloor heating all need to work with the final bathroom design.
Homeowner tip: Before rough-in begins, check your final layout and selections carefully. Make sure your renovator knows the exact products being installed — particularly anything that requires specific plumbing or electrical positioning.
Step 3: Walls, Floors & Preparation
Once the plumbing and electrical rough-in is complete, the bathroom begins to be put back together — although it still won't look much like the finished room yet.
Wall linings, flooring substrates and other surfaces are prepared ready for the stages that follow. Depending on the construction of the home and the scope of the renovation, this may involve new wall sheeting, repairs, floor preparation, patching or other building work.
This stage doesn't produce the dramatic before-and-after transformation homeowners are waiting for, but it is incredibly important.
The finished bathroom is only as good as the preparation underneath it.
Beautiful tiles can't compensate for poor preparation behind them.
Niches, Recesses and Other Details
If your bathroom includes a shower niche, recessed cabinet or other built-in feature, this needs to be properly planned and constructed at the appropriate stage.
A niche might look like a simple rectangle in an inspiration photo, but its position can be affected by wall framing, plumbing, waterproofing requirements and eventually the tile layout.
This is another reason it's helpful to think about these details before construction begins rather than asking for them once tiling is about to start.
Floor Levels and Drainage Matter Too
Bathrooms need to manage water correctly, which means the floor isn't simply about creating a perfectly flat surface for tiles.
Falls need to direct water towards the appropriate waste, and the finished levels need to work with doorways, shower areas and the rest of the home.
Walk-in and open showers in particular require careful consideration because water isn't contained by a traditional enclosed shower in quite the same way.
The details underneath your finished tiles may never be seen again — but they play a huge role in how well the bathroom performs over time.
Homeowner tip: Don't judge progress only by what looks impressive. Some of the most important work in your bathroom renovation will eventually be completely hidden.
Step 4: Waterproofing — One of the Most Important Stages
Once the bathroom surfaces have been properly prepared, waterproofing can begin.
It isn't the glamorous part of a bathroom renovation. Nobody chooses a renovator because they saw a beautiful waterproofing membrane on Pinterest.
But what happens underneath your tiles is far more important than most of the things you'll actually see when the bathroom is finished.
Waterproofing is designed to protect the building structure from moisture in wet areas such as showers, around baths and other areas required by the bathroom design and applicable requirements.
In Australia, bathroom waterproofing must comply with relevant building requirements and Australian Standards. This is not an area where homeowners should be looking for shortcuts simply because the finished waterproofing will eventually disappear underneath the tiles.
Waterproofing Needs Time
One thing homeowners sometimes find surprising is that there can be periods during a renovation when it looks like very little is happening.
Waterproofing is a good example.
Products and systems have required application processes and drying or curing times. The next trade can't necessarily walk in immediately after a membrane has been applied and start tiling over it.
That apparent “quiet time” doesn't automatically mean your renovation has stopped.
Sometimes waiting is part of the work.
Why Waterproofing Problems Can Be So Expensive
The frustrating thing about waterproofing is that once the bathroom is finished, you generally can't see it.
You see beautiful tiles, grout, tapware and a shower screen — while one of the systems helping protect the room is hidden underneath all of it.
If problems occur later, accessing what's underneath may involve removing finished materials to investigate and repair the issue.
That's why this stage deserves considerably more attention than its lack of visual excitement suggests.
Homeowner tip: Ask your renovator who will be responsible for waterproofing, what documentation will be provided where applicable, and keep relevant renovation records and warranties after the project is complete.
Step 5: Tiling — Where the Bathroom Starts to Take Shape
This is usually the stage where homeowners finally start feeling like their new bathroom is appearing.
After weeks of looking at demolition, pipes, wall linings, preparation and waterproofing, the tiles start going down and suddenly you can see the design coming together.
But tiling isn't simply a matter of opening a box and starting in one corner.
The way tiles are set out can have a significant impact on how the finished bathroom looks.
Tile Layout Should Be Considered Before Installation
Your tiler needs to consider where grout lines will fall, where cut tiles will appear, how wall and floor tiles interact, the position of niches and wastes, and how the layout works around fixtures and architectural features.
This becomes particularly important with large-format tiles, feature tiles and bathrooms containing multiple niches, ledges or changes in wall direction.
Sometimes moving the starting position of a tile layout by a relatively small amount can create a much more balanced finished result.
That's why it's worth discussing any important visual expectations with your renovator or tiler before the tiles start going on the wall.
Don't Order Exactly the Measured Square Metres
If your bathroom measures 25m² of tiled area, that doesn't necessarily mean you should order exactly 25m² of tiles.
Additional tiles may be required for cuts, wastage, breakages and the particular tile layout being used.
The amount required will vary depending on the tile, room and design, which is why final quantities should always be confirmed with your renovator, tiler or supplier before ordering.
If you're still in the planning stage, our free Bathroom Tile Calculator can help you estimate your floor and wall tile area, add a wastage allowance and work out approximately how many tiles you may need.
Keep Some Spare Tiles
Once your renovation is complete, it's worth keeping a small quantity of leftover tiles rather than throwing every spare tile away.
Tile ranges, batches and colours can change or be discontinued over time. If a tile is damaged years later, having a few matching originals tucked away can be extremely useful.
Just make sure they're labelled so that five years from now you don't find a mystery box in the garage and wonder why you've been storing six random bathroom tiles.
Homeowner tip: Confirm your tile quantities and proposed layout before installation begins, particularly if you've selected large-format, patterned or feature tiles.
Step 6: Second Fix & Fit-Off — The Bathroom Finally Looks Like a Bathroom
After the tiling is complete, the bathroom reaches one of the most satisfying stages of the renovation: the fixtures and fittings start going in.
Depending on the project, this can include the vanity, basin, toilet, tapware, shower fittings, bath fittings, power points, switches, lighting, exhaust fan and other items included in the renovation.
After spending so much time looking at pipes, waterproofing and unfinished surfaces, this is often when homeowners finally start seeing the bathroom they imagined at the beginning.
But this stage also demonstrates why getting your selections organised early matters.
Your Products Need to Match the Work Already Completed
Many bathroom products aren't interchangeable without consequences.
Different tapware can require different plumbing arrangements. Vanities can have different waste positions. Toilets can have specific plumbing requirements. Mirror cabinets may require wall preparation and electrical provisions. Wall-mounted fittings need to be positioned correctly before the finished wall is complete.
By the time you reach fit-off, much of the work supporting those products has already happened.
This is why deciding to swap products at the last minute isn't always as simple as returning one box and buying another.
Check Products Before They Are Needed
Ideally, products shouldn't be arriving for the first time on the morning they're due to be installed.
Deliveries can be delayed. Items can arrive damaged. The wrong product can be supplied. Something ordered weeks earlier can suddenly be found to be missing a component.
Finding that out before installation day gives everyone much more opportunity to solve the problem without affecting the renovation schedule.
Homeowner tip: Keep a clear selections list showing the exact products chosen for your bathroom, and check that important items have arrived correctly before they're required on site.
Step 7: Shower Screen, Mirrors & Finishing Details
Once the major fixtures are installed, the finishing details start bringing the whole bathroom together.
Depending on your renovation, this may include the shower screen, mirrors, towel rails, toilet roll holder, robe hooks, shelving and other accessories.
These items might seem minor compared with waterproofing, plumbing or tiling, but their positioning can make a surprisingly big difference to how practical the finished bathroom feels.
Why the Shower Screen May Come Later
Homeowners are sometimes surprised that a shower screen isn't necessarily ready to install the moment the tiling is finished.
For custom-made shower screens, final measurements may need to be taken after the relevant finished surfaces are complete. This allows the screen to be manufactured to suit the actual finished space rather than relying only on measurements taken before tiling.
Depending on the screen and supplier, this can mean there is a period where the bathroom looks almost finished — except for the rather important piece of glass keeping the shower water where it belongs.
This is worth understanding when discussing your renovation timeline.
Think About Accessories Before Someone Drills the Tiles
Towel rails and hooks may be small items, but don't leave their locations completely to chance.
Think about how you'll actually use the room.
Can you reach a towel comfortably when stepping out of the shower? Does the toilet roll holder make sense from the toilet? Will the bathroom door hit a towel rail? Is a robe hook positioned somewhere useful rather than simply wherever there happened to be a spare patch of wall?
It's much easier to move an accessory before holes have been drilled into your brand-new tiles.
Homeowner tip: Before accessories are installed, physically stand in the bathroom and consider how you'll use each one. A position that looks good on a drawing doesn't always feel right once you're standing in the finished space.
Step 8: Final Inspection & Handover
The tiles are finished. The vanity is installed. The tapware is on. The shower screen is finally in place.
Your bathroom looks finished — but there is still one important stage left.
Before the renovation is considered complete, the finished work should be inspected and any outstanding items identified. Depending on the project, this may include checking fixtures, finishes, silicone, accessories, doors and drawers, electrical items and the general presentation of the room.
Small finishing items are sometimes referred to as defects or snagging items. Identifying them at handover gives both you and your renovator a clear understanding of anything that still requires attention.
Don't Just Look at the Pretty Things
It is very easy to walk into your new bathroom and immediately focus on the beautiful vanity or the tiles you've spent months choosing.
Take your time.
Open drawers and cupboards. Check that doors operate properly. Look at finishes from different angles. Check accessories and fixtures. Make sure you understand how any unfamiliar products or features operate.
If something concerns you, ask about it rather than quietly wondering whether it's normal.
Keep Your Renovation Records
Once everything is finished, don't immediately bury your renovation paperwork in the back of a cupboard.
Keep relevant contracts, invoices, product information, warranties, certificates and other documentation together somewhere you can find it later.
It's also worth keeping a record of the exact products, finishes and tiles used in the bathroom.
Three years from now, “the beige tile from that shop near the roundabout” is unlikely to be enough information to track down a replacement.
Homeowner tip: Create one digital folder for your completed renovation and save your important paperwork, warranties, product details and final photos in it.
The Best Bathroom Renovations Start Before Demolition
The finished bathroom might be what everyone sees, but many of the decisions that determine how smoothly a renovation runs happen long before the first tile is installed.
Understanding the bathroom renovation process helps you know what needs to be decided, when it needs to be decided and why those decisions matter.
You don't need to become a plumber, tiler, electrician or waterproofing expert.
You do, however, want to be an informed homeowner who knows which questions to ask.
Before your renovation begins, make sure you understand your layout, budget, selections, quote, allowances and what's included in the scope of work. Ask questions when something isn't clear and don't be afraid to clarify decisions before work progresses to the next stage.
Because once walls are closed, waterproofing is complete and tiles are installed, changing something can become considerably more complicated than changing it on paper.
Still Planning Your Bathroom?
If you're at the beginning of your renovation, start with our Free Bathroom Renovation Checklist to work through the important decisions to organise before demolition begins.
Already working on your numbers? Try our Bathroom Renovation Budget Calculator to see how your selections and contingency fit within your overall renovation budget.
And if you're trying to understand the entire renovation before spending tens of thousands of dollars, Own Your Reno | Bathroom Edition walks Australian homeowners through budgeting, layouts, fixtures, showers, tiles, contracts, variations, planning and much more.
Plan smarter. Ask better questions. Avoid costly mistakes. Renovate with confidence.