How Much Does a Bathroom Renovation Cost in Australia? (2026)

Last updated: 28 May 2026 · By Mossy Tariq, Founder — Property Blueprint Co.

Ask what a bathroom renovation costs in Australia and you will get a number somewhere between $5,000 and $55,000. Both ends are true. Neither one tells you what your bathroom will cost, because most of what makes a bathroom expensive sits behind the tiles where nobody can see it — and most of what makes a bathroom go wrong sits there too.

This is the room where the information asymmetry the renovation industry profits from does its most expensive work. A bad kitchen looks dated. A bad bathroom leaks. Research cited by the Victorian Building Authority suggests up to 70 percent of Australian buildings constructed since 2000 have experienced water ingress, with waterproofing failures consistently topping building complaints — and the cost of a rip-out, replacement, and refinish on a failed bathroom is almost always greater than the cost of the original renovation.

What follows is what a bathroom renovation actually costs in 2026: the real tiers, where the money goes line by line, why two quotes for the same bathroom can land $15,000 apart, and the costs the quote does not show you. It is written for the homeowner who would rather understand the number than be surprised by it.

A bathroom renovation has no average cost.
It has the cost of what's behind the tiles — and what happens when that goes wrong.

The tiers below are drawn from current Australian renovation cost reporting and the Housing Industry Association's annual Kitchens and Bathrooms Report. They apply to a standard bathroom of roughly four to seven square metres. Use them as a frame, then build your own number against them.

What does a bathroom renovation actually cost in Australia in 2026

A bathroom renovation in Australia falls into three cost tiers, and as with a kitchen the gap between them is almost entirely a function of scope and finish — not of how good your trades are.

A cosmetic refresh — keeping the existing layout and plumbing positions, replacing tapware and the vanity, retiling the wet zone but not the full room — typically runs $5,000 to $15,000. A mid-range renovation — a full retile, new shower screen, new vanity and toilet, replumbed and rewaterproofed in the existing footprint — is where most Australian homeowners land, at roughly $15,000 to $35,000. A premium renovation — relocated fixtures, freestanding bath, premium tiling, frameless screens, underfloor heating, high-end tapware — starts around $35,000 and runs past $55,000 in the capital cities.

Industry cost reporting puts the national average at around $26,000 for a standard mid-range bathroom. The Housing Industry Association's annual Kitchens and Bathrooms Report, which tracks completed renovation spend across the country, anchors the consensus figure — and it is a more reliable starting point than the headline ranges, because it reflects what homeowners actually spent rather than what a renovator hopes to quote.

Per square metre, a mid-range Australian bathroom typically runs $2,300 to $4,600. Where you live moves the figure before you have chosen a single tile: a Sydney bathroom commonly runs 15 to 25 percent above the national median, driven by labour rates and stricter compliance enforcement. Adelaide and Hobart commonly sit below it. A complete bathroom renovation planning checklist sets out what belongs in scope; the rest of this article sets out what each part of that scope costs.

Where does the money in a bathroom renovation actually go

Six line items account for almost every dollar of a bathroom renovation. The proportions are not the same as a kitchen, and that is the most useful thing to understand before reading any quote.

1. Waterproofing — typically $2,000 to $6,000, and the single most important line in the entire project. Australian Standard AS 3740:2021, referenced in the National Construction Code, sets the minimum specification — including a minimum waterproof wall height of 1800mm in shower areas, well above what many older bathrooms were built to. This line is small in dollar terms and disproportionate in consequence: it is the line that decides whether you renovate this bathroom once or twice.
2. Plumbing — $3,000 to $10,000, set almost entirely by whether the toilet, shower, and basin stay where they are. A like-for-like fitout keeps this line small; relocating fixtures triggers re-rough-in work, slab penetrations or floor framing modifications, and ripples into the waterproofing and tiling lines. Plumbing must be carried out by a licensed plumber under AS/NZS 3500, and a plumbing compliance certificate must be issued on completion.
3. Tiling — $3,000 to $12,000 installed, driven more by labour than by tile selection. A full-height retile of a small bathroom contains a surprising amount of square metreage once walls, floor, niche, and bath surround are counted, and the labour rate reflects the precision tiling demands in a wet area.
4. Fixtures and fittings — $2,000 to $15,000-plus. Vanity, toilet, basin, shower screen, tapware, towel rails, mirror. An entry package sits at the bottom of that range; the bottom of the premium range starts at about double it. This is the line homeowners most often under-budget, because the showroom photograph they fell in love with was specified near the ceiling of it.
5. Electrical — $1,000 to $3,500. Exhaust fan, downlights, heated towel rail, shaver point, occasionally underfloor heating. Must be carried out by a licensed electrician under AS/NZS 3000, with a Certificate of Electrical Compliance issued on completion.
6. Demolition, waste removal, labour, and project margin — the remainder, and the line most likely to look thin in a quote that intends to recover it later as a variation.

Why is a bathroom so expensive per square metre

Because almost every line item in a bathroom is a fixed cost dressed as a variable one.

A four square metre bathroom and a seven square metre bathroom contain the same waterproofing perimeter, the same plumbing rough-in, the same electrical compliance work, the same shower base, and the same minimum tile-setting time per junction. The variable costs — tile area, vanity size, the additional metre of wall — are a small share of the total. Most of what you are paying for does not scale down with the room.

This is why a "small bathroom" is rarely a cheap bathroom, and why per-square-metre rates in this room run higher than in any other in the house. A kitchen of comparable size has roughly a third of the wet-area compliance work and none of the certification gates. A bedroom of comparable size has none of it.

It is also why two quotes for the same bathroom can land $15,000 apart, and the gap is almost never in tile selection. It is in the assumptions each quote makes about waterproofing scope, tile substrate preparation, and what counts as "in" versus "to be supplied by client". Reading a quote for what it excludes is the skill that closes that gap, and it matters more in a bathroom than it does anywhere else, because the variations land in the most expensive places.

There is one more variable, and it is the one the cost guides rarely name. A trade pricing a job reads the homeowner first. Preparation is visible in the first conversation — whether you have a written scope, whether you know what a variation is, whether you can tell a structural quote from an optimistic one. A homeowner who reads as prepared is quoted accurately, because the buffer that protects the trade against an undefined project is not needed. A homeowner who reads as unprepared is quoted for the project plus the uncertainty. This is not dishonesty. It is a rational response to risk — and it costs the unprepared homeowner thousands all the same.

How much should you budget for a bathroom renovation, and what does the quote leave out

Start with a figure the industry uses as a sanity check: a bathroom renovation typically lands between 3 and 5 percent of the home's value. On a $750,000 home that is roughly $22,500 to $37,500 for a bathroom that returns at resale, which puts it firmly inside the HIA's mid-range band. The Housing Industry Association publishes this kind of range as a budgeting guide, and it is a useful reality check against both an under-scoped quote and an over-specified showroom. In the twelve phases of a renovation, this validation is phase two — get it wrong and every later phase prices the wrong project.

Then add the costs the quote does not show you. These are not hidden in a sinister sense. They are simply outside the scope the trade quoted, which means they land on you, and they land late.

1. Home Building Compensation cover. In NSW, residential building work valued over $20,000 requires the contractor to hold valid HBC insurance, with a certificate supplied to the homeowner before the contract is signed. Other states run equivalent home-warranty insurance schemes. It is a line in the quote, not a line you pay separately, but it is the line most often missing from quotes that read suspiciously cheap.
2. The exclusions the demolition reveals. Hidden water damage to the framing, asbestos in a pre-1990 bathroom, a slab that has cracked or shifted, or non-compliant existing waterproofing that must be removed before a new membrane can go down — none of which any trade can quote until the tiles come off.
3. Compliance certificates and council requirements. The waterproofing certificate, the plumbing compliance certificate, and the electrical compliance certificate are non-optional and small individually. In strata buildings, bathroom renovations involving waterproofing work are classified as major renovations under the relevant strata legislation, and require owners' corporation approval before work begins. Where the renovation involves a layout change, structural modification, or relocation of fixtures, you may also need a development consent — NSW Fair Trading and the equivalent state regulators set out which licences and approvals apply.
4. Provisional sums and prime cost allowances. The placeholder figures in the quote for items not yet chosen — tile selection, tapware, vanity. They are estimates, not prices, and they almost always rise once the real selection is made.
5. The contingency. Ten to fifteen percent of the project, held back deliberately. In a bathroom the contingency is doing more work than in any other room, because the demolition reveals more than in any other room.

A budget that accounts for the quote plus these five lines is a budget that survives contact with the renovation. A budget that is only the quote is a deposit on a larger number.

What a cost range can't tell you about your bathroom

Every figure in this article is a range, and a range is the most an honest general guide can give you. Your bathroom is not a range. It is a specific layout decision, a specific waterproofing scope, a specific tile substrate, and a specific set of trades quoting against a specific scope — and the distance between the bottom of each range and the top is decided by you, before any trade arrives.

That is the work a planning system does. Budgeting in a bathroom renovation is the second of twelve phases in The 12-Phase System — Property Blueprint Co.'s named mechanism for taking a homeowner from the first quote conversation to final sign-off without paying the variation premium, the early-payment penalty, or the defects shortfall the unprepared homeowner pays. The cost is not a number you wait to receive. It is a number you build, phase by phase, with the decisions made in the right order.

The Bathroom Renovation Blueprint runs the bathroom-specific version of those phases: the scope template that makes quotes genuinely comparable, the waterproofing specification that prevents the rip-and-redo cost, and the decision sequence that sets the layout cost before it is locked. Built by someone who has managed renovations on real properties, for the homeowner managing their own. A kitchen, laundry, or outdoor project each has its own Renovation Blueprint for the same reason — and the kitchen cost article covers the room that, alongside this one, makes up most Australian renovation budgets.

If you are also planning a kitchen, the same logic applies — what a kitchen renovation actually costs in Australia sets out the parallel breakdown for the other big-budget room. And if a cost baseline is the right first step for either room, start with the free Renovation Cost Calculator — a trade-by-trade estimate for your specific bathroom, in under 5 minutes, before any trade has quoted.

Frequently asked questions

How much does a bathroom renovation cost in Australia in 2026?

A bathroom renovation in Australia costs roughly $5,000 to $15,000 for a cosmetic refresh, $15,000 to $35,000 for a mid-range renovation with a full retile and new fixtures in the existing footprint, and $35,000 to $55,000-plus for a premium renovation with relocated fixtures and high-end finishes. The Housing Industry Association's annual Kitchens and Bathrooms Report puts the national average at around $26,000. Sydney typically runs 15 to 25 percent above the national median; Adelaide and Hobart commonly sit below it. Per square metre, a mid-range bathroom typically costs $2,300 to $4,600.

Why is a bathroom so expensive per square metre?

Because almost every line item in a bathroom is a fixed cost. Waterproofing perimeter, plumbing rough-in, electrical compliance work, shower base, and minimum tile-setting time per junction do not scale down with the room. A four square metre bathroom contains roughly the same compliance work as a seven square metre one, which is why per-square-metre rates in this room run higher than in any other in the house.

What is the most important part of a bathroom renovation?

Waterproofing. In dollar terms it is typically $2,000 to $6,000 — not the largest line item. In consequence it is the largest, because it is the gate to plumbing sign-off, which is the gate to electrician sign-off, which is the gate to final certification. Industry research suggests up to 70 percent of Australian buildings constructed since 2000 have experienced water ingress, and a waterproofing failure in a finished bathroom is almost always more expensive to fix than the cost of the original renovation. Australian Standard AS 3740:2021, referenced in the National Construction Code, sets the minimum specification.

Why are bathroom renovation quotes so different from each other?

Because they are rarely priced against the same scope. The biggest gaps in a bathroom quote are waterproofing scope (shower only versus full floor), tile substrate preparation, fixture supply assumptions, and demolition allowances. Where the scope is loose or verbal, each trade fills the gaps with their own assumptions, and the homeowner ends up comparing interpretations rather than prices. Those gaps surface later as variations, in the most expensive places.

Do I need council approval for a bathroom renovation in Australia?

Often no, but not always. A like-for-like bathroom renovation that keeps the existing layout and does not alter structural elements typically does not require council approval. Renovations involving a layout change, fixture relocation that requires structural work, the addition of a new bathroom, or work on a heritage-listed property usually do. In NSW, any residential building work valued over $5,000 must be carried out by a licensed contractor; over $20,000 the contractor must hold Home Building Compensation insurance. In strata buildings, bathroom renovations involving waterproofing are classified as major renovations and require owners' corporation approval. Check with your local council and state regulator before scoping the project.

Is it cheaper to keep my existing bathroom layout?

Yes, materially. The single biggest controllable cost in a bathroom renovation is whether the toilet, shower, and basin stay where they are. A like-for-like fitout keeps the plumbing line small and the waterproofing scope simple; relocating fixtures triggers re-rough-in work, slab penetrations or floor framing modifications, and ripples into the waterproofing and tiling lines. The layout decision is made before any trade quotes, which is why it is the homeowner's largest single lever on the final number.