Planning a Bathroom Renovation: A Complete Guide
Timelines, budgets, the order trades work in, what needs a licence and where renovations go wrong. Everything to sort out before anyone picks up a tool.
6 August 2026 • 4 min read
Most bathroom renovations that go badly went wrong before demolition started. The decisions that matter are made early: whether the layout moves, what the budget actually covers, and whether the trades are booked in the right order.
This guide covers the planning, in the order the decisions need making.
1. Decide whether the layout is changing
This is the single biggest decision and it drives everything else.
Keeping the layout means the toilet, shower, bath and vanity stay roughly where they are. Plumbing connections stay put. The job is demolition, waterproofing, tiling and fit-off, and it is the fastest and most predictable version.
Moving the layout means relocating drainage and supply lines. On a concrete slab that can mean cutting the slab. On a suspended timber floor it means working between joists, and there are limits to where a waste can go. It adds cost, time and plumbing work.
There are good reasons to move things. A cramped layout that has annoyed you for a decade is worth fixing. Just make the decision knowingly, because it roughly determines the project.
2. Set a realistic budget
Sydney bathroom renovations vary enormously, mostly by size, layout changes and the level of the fixtures. Our fixed-price packages start from $18,999, and our cost guide breaks down where the money actually goes.
The parts people underestimate:
- Waterproofing and preparation. Invisible in the finished room, and the part that determines whether it lasts. Roughly 5 percent of the budget and close to all of the risk.
- Rubbish removal and access. A second floor bathroom in a terrace with no side access costs more to strip out than a ground floor one with a driveway.
- What is behind the walls. Nobody knows until demolition. Old plumbing, rot in the framing, or non-compliant wiring all surface at that point.
- Fixtures. The gap between entry-level and premium tapware alone can be several thousand dollars.
3. Understand the sequence
Trades have to run in a specific order, and each one waits on the one before. The full order of works is here, but the short version is: strip out, rough-in plumbing and electrical, sheeting, waterproofing, cure, screed, tile, grout, fit-off, silicone.
Understanding this explains why a bathroom cannot be compressed indefinitely. The waterproofing has to cure before tiling. Grout has to cure before silicone. These are chemical processes and they take what they take.
4. Make your selections before demolition
Tiles, tapware, vanity, toilet, shower screen, lighting. All of it chosen and preferably on site before the job starts.
The most common cause of a stalled bathroom is not a trade problem, it is a tile that turned out to be on a 6 week lead time, decided in week 2. A room with no tiles is a room nobody can work in.
If you are still deciding, our guide to choosing bathroom tiles covers what actually matters, and bathroom renovation ideas is a good place to start on the look.
5. Know what needs a licensed trade
Plumbing, electrical and waterproofing are licensed work. There is a real line between what a competent homeowner can do and what legally requires a licence, and it is worth knowing where it sits before you plan to save money on labour.
6. Plan for the disruption
If it is your only bathroom, you are without it for the duration. Work out the arrangement before the job starts rather than during week 2.
Dust travels. Good operators seal the work area, but a renovation is a demolition site in the middle of your house for a fortnight.
7. Check strata and building rules
If you are in an apartment, the owners corporation almost certainly has requirements: approved working hours, evidence of licensing and insurance, and often approval of the wet area works before they start. Start this early, because approval timelines are not in your control.
The things that go wrong
Most problems trace to a short list: selections made too late, layout changes decided after demolition, budget with no contingency for what is behind the walls, and trades booked in the wrong order so each one waits on the last. The common mistakes are covered here.
Where to start
Decide the layout question first. Everything else follows from it.
If you would rather have one party handle the sequence, the trades and the compliance, our bathroom renovation packages are fixed-price and include the waterproofing, and we have been doing this across Sydney for 28+ years.
Common questions
How long does a bathroom renovation take in Sydney?
A standard bathroom runs about 2 to 3 weeks of on-site work once it starts, assuming no structural changes and no surprises behind the walls. Planning, selections and trade scheduling happen before that and are usually what determines the real start date.
What is the first thing to do when planning a bathroom renovation?
Decide whether the layout is changing. Moving the toilet, shower or vanity means moving plumbing, and that single decision drives cost, duration and the number of trades more than any finish you choose afterwards.
Do I need council approval to renovate a bathroom?
A like-for-like bathroom renovation that does not alter the structure generally does not need development approval, though rules vary by council and strata schemes have their own requirements. Anything structural, or any change to the building's external appearance, needs checking first.
Everything in this guide
- 9 Bathroom Renovation Mistakes That Cost the Most to FixThe decisions that go wrong most often, why each one is expensive later, and what to do instead. Drawn from stripping out other people renovations.
- Bathroom Renovation Ideas That Still Look Right in 10 YearsIdeas worth the money, ideas that date fast, and the small decisions that make a bathroom feel considered. From someone who tiles them for a living.
- Bathroom Renovation Order of Works: Trade by TradeThe exact sequence a bathroom renovation runs in, which trade does what, and why the order cannot be rearranged to save time.
- Bathroom Renovation: What You Can DIY and What Legally Needs a LicencePlumbing, electrical and waterproofing are licensed work in NSW. Here is the honest line between what a capable homeowner can do and what you must not touch.
- How Long Does a Bathroom Renovation Actually Take?About 2 to 3 weeks on site for a standard Sydney bathroom. Here is the week-by-week breakdown, what makes it longer, and why some stages cannot be compressed.
- Small Bathroom Renovation Ideas That Actually WorkSydney terraces and apartments have small bathrooms. Here is what genuinely makes them feel larger, what to spend on, and the tile choices that help rather than hurt.
- What It Costs to Tile a Bathroom in SydneyWhat tiling a bathroom costs as a standalone trade, what drives the number up, and why square metre rates are a poor guide in a small wet room.
Want this done properly the first time?
We have been tiling and renovating bathrooms across Sydney for 28+ years. Fixed quotes, no surprises, and the wet areas done to the standard.