Renovate a bathroom out of order and you pay twice: once to build it, and again to rip out finished work to reach what is behind the wall. Order is everything. The process runs in a strict sequence: gutting and demolition, rough-in plumbing and electrical, drywall and wall sheeting, painting, flooring, cabinetry installation, then final fixture connections. Skip a step or run them out of order, and you undo work you have already paid for.
This is not another vague overview. Below, you get our Ultimate 10-Step Renovation Checklist and a full Australian budget breakdown you can use to plan your own project, whether you are managing it yourself or briefing a builder. Roughly two-thirds of this page is the working tools you actually need: the checklist, the budget templates, the decision flowcharts, and the mistake-prevention guide.
Use it as your project plan.
In What Order Should I Renovate a Bathroom? (The Master Checklist)
Always work from the inside out and top to bottom. Never install finishes such as flooring or wall tiles before the “rough-in” plumbing and electrical behind the walls has been signed off. The rough-in is the plumbing and wiring that lives inside the wall and floor cavities. Once it is covered by sheeting and tile, reaching it again means demolition, so it has to be right before anything gets closed up.
Here is the exact order every well-run bathroom renovation follows.
The 10-Step Executable Checklist
Step 1. Demolition (gutting). Strip the room back to the studs and subfloor. Remove the old vanity, toilet, bath, tiles, and wall linings. Isolate water and power before you start, and skip-bin the waste as you go so the space stays workable.
Step 2. Framing and subfloor repair. With the walls open, fix any rot, water damage, or out-of-level framing. Add noggins (timber blocking) where you will later hang a wall-mounted vanity, grab rail, or heavy mirror. Level and repair the subfloor now, because everything above it depends on a flat, sound base.
Step 3. Rough-in plumbing and electrical. Run new water supply lines, drainage, and wiring while the walls are open. This is where you set the final positions of taps, the shower, the toilet drain, exhaust fan, downlights, and heated towel rail. Move nothing after this point without real cost.
Step 4. Inspections (the milestone you cannot skip). Before you cover anything, the plumbing and electrical rough-in should be checked and signed off by a licensed tradesperson. In New South Wales, plumbing and drainage work must be carried out and certified by a licensed plumber. This milestone protects you: closing up a wall over unapproved work is the most expensive mistake in the whole process.
Step 5. Insulation and wall sheeting. Insulate external walls if needed, then line the room. Use water-resistant cement sheet (not standard plasterboard) in the shower and other wet areas, because it holds up behind tile where ordinary board fails.
Step 6. Waterproofing and tile installation. Apply the waterproofing membrane to the shower, floor, and wet-area walls, and let it cure fully before tiling. In Australia this must meet AS 3740 (the waterproofing of domestic wet areas standard). Only once the membrane is done do the wall and floor tiles go on. This is the single most important stage in the room. Get it wrong and water tracks into the structure for years.
Why this stage decides everything: Most studies place the prevalence of waterproofing defects in Australian apartment buildings between 20 and 40 per cent of buildings, and remedial-work experts consulted by the Australian Building Codes Board attribute 80 to 90 per cent of those defects to sub-surface water rather than surface splashing (ABCB, Waterproofing provisions in NCC 2025: Impact Analysis, 2024). In plain terms: most waterproofing failures come from water moving through the structure below the visible surface, which is exactly what a properly designed membrane, drainage, and floor fall are there to stop.
Step 7. Painting. Paint the ceiling and any non-tiled walls now, while the room is empty and you can be messy without risk to fixtures. Doing overhead work before the vanity and toilet go in means no drop cloths draped over new porcelain.
Step 8. Flooring. If you are laying a floating floor rather than tiling (for example luxury vinyl plank), it goes down after painting but before the toilet and vanity. That way the fixtures sit on top of a continuous, finished floor and there are no awkward cut-ins around their bases. Tiled floors, by contrast, are laid back at Step 6.
Step 9. Cabinetry and vanity installation. Fit the vanity, any custom joinery, shelving, and the mirror cabinet. With finished walls and floors in place, everything lands level and clean.
Step 10. Final plumbing and electrical trim. The last stage is “fit-off”: connecting taps, the shower mixer, the toilet, the basin, light fittings, the exhaust fan, and the towel rail. A final plumbing and electrical check confirms everything is compliant and leak-free before you hand the room back to daily use.
Try This Now: Copy the 10 steps above into a note or spreadsheet. Against each one, write a target date and the person responsible: a specific trade (plumber, tiler, electrician) or “DIY” if you are doing it yourself. You now have a real project schedule instead of a wish list.
Progress indicators: Week 1 covers demolition and rough-in (Steps 1 to 4). Weeks 2 to 3 are waterproofing and tiling (Steps 5 and 6), and the waterproofing needs curing time between coats that cannot be rushed. Week 4 is painting, flooring, cabinetry, and fit-off (Steps 7 to 10). Most complete renovations run about four weeks, sometimes five for larger or luxury jobs.
What Does a $10,000 vs $20,000 Bathroom Renovation Look Like? (And What About a Full Reno?)
A $10,000 budget is a cosmetic budget, not a renovation budget. It buys a “pull-and-replace” refresh that keeps your existing layout, tiles, and waterproofing in place. You cannot fully renovate a bathroom for $10,000 in Sydney. Once you add licensed plumbing, electrical, and certified waterproofing on top of tiling and fixtures, the money runs out before the job is finished. A complete strip-out with all trades starts at a realistic minimum of $19,980, which is what a genuine $20,000 renovation buys. From there, a quality mid-range renovation runs to around $40,000, and luxury renovations with structural or layout changes reach $50,000.
For the full breakdown, see our guide to bathroom renovation costs in Sydney. For context, the Housing Industry Association puts the average Australian bathroom renovation at $26,747, and independent architect body Archicentre Australia prices a complete wet-area fit-out at $17,500 to $35,000.
The Budget Breakdown Template
| Factor | Cosmetic refresh (~$10,000) | Complete reno, entry ($19,980) | Mid-range reno (to ~$40,000) | Luxury ($40k–$50k) |
|---|---|---|---|---|
| Scope | Paint, new vanity, new tap and toilet, partial tiling, keep the layout | Full strip-out, floor-to-ceiling tiling, certified waterproofing, all new fixtures | Custom vanity, premium tiling and fixtures, minor layout tweaks | Custom joinery, freestanding bath, layout changes, structural work, heated floors |
| Plumbing | Keep exact locations, reuse existing outlets | Certified re-plumb, fixtures stay in roughly the same zones | Relocate outlets within the room | Full re-plumb, drains relocated, new layout |
| Waterproofing | Existing membrane kept, minor repairs only | New AS 3740-compliant membrane throughout | New certified membrane throughout | New certified membrane, full wet-room detailing |
| Labour | Mostly DIY, licensed plumber for fit-off | Fully professional, all licensed trades | Fully professional, project-managed | Full professional team plus designer |
| Timeline | A weekend to a week | About four weeks | About four to five weeks | Five weeks or more |
Decision Flowchart: Which Budget Tier Are You In?
Answer one question first:
“Am I moving the toilet, the shower drain, or any wall?”
- YES → You are in full-renovation territory. Budget from $19,980 and up. Relocating drainage means new waterproofing, new floor falls (the slope to the drain), and certified plumbing. There is no cheap version of this, and trying to force it into a cosmetic budget is where projects blow out.
- NO → You can keep it cosmetic, up to about $10,000. Reuse every existing outlet, and spend the budget on the finishes people actually see and touch: tapware, the vanity, the shower screen, and lighting. Just remember that a $10,000 budget refreshes a bathroom; it does not renovate one.
Actionable Tip: Want to convert a bath into a walk-in shower without the full-reno price tag? Use a pre-fabricated acrylic shower base instead of a fully tiled shower floor with a built-up lip and graded fall. It drops straight onto the existing drain position, needs far less waterproofing detailing, and can save you thousands over a fully tiled shower floor.
Common Bathroom Renovation Mistakes to Avoid (And the Most Regretted Upgrades)
The most expensive bathroom renovation mistakes are almost always the same three: poor waterproofing, ignoring ventilation, and moving plumbing lines that did not need to move. Each one is invisible on day one and painful two years later. Here is how to avoid them, along with the upgrades people most often regret.
This is not a rare problem. A study of 212 Australian residential building audits recorded 3,227 separate defects, an average of around 14 per building, and waterproofing was one of the most common categories, accounting for 11.46 per cent of every defect found (Johnston & Reid, An Examination of Building Defects in Residential Multi-owned Properties, Griffith University, 2019). Waterproofing failure is not bad luck. It is one of the most frequently recorded building faults in the country, which is why the prep stages below matter more than the finishes.
Mistake 1: Chasing trends onto permanent surfaces
Highly personalised, of-the-moment tile choices (bold geometrics, statement colours, unusual formats) feel exciting during selection and date fast. The problem is that hardscaping (tile, stone, the shower base) is the most expensive and disruptive thing to change later.
Solution: Keep your permanent surfaces classic and neutral. Put the trend into the things you can swap cheaply: paint, tapware finish, cabinet handles, mirrors, and accessories. You get a current look now and an easy refresh in five years without touching the tiler.
Mistake 2: The tub-to-shower regret
Removing the bath to gain a bigger shower is one of the most common upgrades, and one of the most regretted, because it can hurt resale. Family buyers in particular often filter out homes with no bath.
Solution: Only remove a bathtub if there is at least one other bath left in the house. If this is your only bathroom or your only tub, think hard before you lose it. A compact shower-over-bath keeps both options open.
Mistake 3: Laying the floor at the wrong time
Beautiful new flooring installed too early gets dented by dropped tools, splashed with paint, and scratched by trades working above it.
Solution: Always finish the overhead work first. Ceiling, wall sheeting, painting, and ceiling lights should be done before delicate flooring goes down. This is exactly why the 10-step order above puts painting at Step 7 and floating floors at Step 8, and never the other way around.
Key Takeaway: The hardest and most important part of a renovation is the unseen preparation: waterproofing and levelling. It is also the easiest place to try to save money, and the worst. Never cut the budget on what goes behind the walls and under the tiles. Finishes you can always upgrade later. A failed membrane means ripping the whole room out again.
How to Maximise ROI: What Actually Adds Value?
Start with a quick honest assessment of your current bathroom. Does it look cheap because of the materials, or is it genuinely dysfunctional because of the layout? The answer decides where your money should go. A tired but well-laid-out room needs a surface refresh. A cramped or badly planned room needs structural change, and that is a bigger budget.
How to make a bathroom look high-end on a smaller budget
Three moves deliver the biggest visual lift for the least money:
- Upgrade the lighting plan. Add wall sconces beside the mirror and put downlights on a dimmer. Layered light reads as considered and expensive. Flat, single-source lighting reads as builder-basic.
- Use large-format tiles. Bigger tiles mean fewer grout lines, which makes a small room feel larger and cleaner, and cuts down the grout you have to scrub.
- Install a floating (wall-hung) vanity. Seeing the floor run underneath the vanity makes the whole room feel more spacious and current, and it is easier to clean under.
Best flooring by budget
- Cosmetic budgets (up to ~$10k): Luxury vinyl plank (LVP). It is warm underfoot, water-resistant, quick to lay, and forgiving over an existing floor.
- Full renos ($19,980+): Porcelain tile. It is the most durable and water-tolerant option, suits the wet-area standard, and holds its value far better in a full renovation.
Your Action Plan: Audit your current bathroom before you spend a cent. Identify three things you can keep, for example a sound cast-iron bath, a solid timber vanity cabinet, or good-quality tapware. Every item you retain frees up budget for the statement pieces that genuinely lift the room: a stone or quartz benchtop, premium brass or matte-black fixtures, or a designer feature tile behind the vanity. Spend where it shows, save where it does not.
Ready to Plan Your Renovation Properly?
A well-run bathroom renovation is not about working faster. It is about working in the right order, getting the waterproofing and rough-in signed off before anything is covered, and spending your budget where it counts. Use the 10-step checklist as your schedule and the budget templates to set realistic expectations before you brief anyone.
If you would rather hand the whole process to a team that manages every trade in-house and holds building, plumbing, and waterproofing licences under one roof, that is exactly what we do. Book a free design session at our Dural showroom and we will walk you through your project, your options, and a fixed-price quote backed by our 10-year leak-free guarantee.
This guide is general information for planning purposes. Plumbing, drainage, and waterproofing work in New South Wales must be carried out by appropriately licensed tradespeople and comply with the relevant Australian Standards, including AS 3740 for wet-area waterproofing.