A Melbourne bathroom renovation costs $17,500 to $35,000 for a standard family bathroom, done properly by licensed trades with a compliant waterproofing membrane. That is meaningfully less than Sydney and slightly more than Adelaide, and it reflects Melbourne’s position in the middle of the national trade-rate range.
What the headline figure does not tell you is how often a Melbourne bathroom renovation turns into a structural job. In this city’s timber-framed housing stock, lifting the floor of a bathroom that has been quietly leaking for fifteen years reveals rotted joists more often than not. That discovery adds $3,000 to $12,000 and a fortnight, and it is the single most common reason Melbourne bathroom budgets move.
What You Get at Each Price Point
$13,000 to $18,000 — the compromise renovation
Achievable but something is giving. A small bathroom under five square metres, budget tapware and vanity, standard tiles laid to 2,100mm rather than full height, a framed screen, and the existing layout retained exactly. Fine for investment properties.
Be careful in this band. It is where corners get cut on what you cannot see — a single-coat membrane instead of the specified system, no screed falls to the waste, tiles over an unprepared substrate. If a Melbourne quote comes in under $15,000 for a full bathroom, ask specifically what membrane is being used and who issues the certificate.
$18,000 to $28,000 — the standard Melbourne bathroom
Where most owner-occupier work lands. Full-height tiling, a semi-frameless or frameless screen, a quality wall-hung or freestanding vanity, mid-range tapware with a real warranty, a heated towel rail, an inline exhaust fan ducted outside, LED lighting, and a properly certified membrane. Minor layout adjustments within the existing footprint included.
$28,000 to $45,000 — the reconfigured bathroom
Services move. A hobless walk-in shower with a linear drain replaces a step-up base. Large-format tiles go on the walls. Underfloor heating goes in — genuinely worth it in Melbourne’s climate in a way it is not in Brisbane. Custom joinery replaces an off-the-shelf vanity.
$45,000 and above — the premium bathroom
Natural stone, concealed cisterns and in-wall mixers, thermostatic shower systems, freestanding baths, bespoke mirror cabinetry with integrated lighting and demisting, and a builder allocating a dedicated tiler for three weeks rather than four days.
The Line-by-Line Breakdown
Where the money goes on a typical $24,000 Melbourne bathroom of about seven square metres:
- Strip-out, disposal and site protection — $1,200 to $2,800
- Plumbing rough-in and fit-off — $3,500 to $7,000
- Electrical — $1,400 to $3,200, covering IP-rated lighting, exhaust, heated towel rail, and any underfloor heating connection
- Carpentry and substrate preparation — $1,200 to $3,500, and higher in timber-framed homes where framing needs attention
- Waterproofing to AS 3740 — $1,100 to $2,300, including the certificate
- Screed and falls — $550 to $1,400
- Tiling, supply and lay — $5,500 to $12,000; laying labour alone runs $70 to $130 per square metre
- Fixtures and fittings — $3,500 to $11,000
- Plastering, painting and making good — $1,400 to $2,800
- Project management and margin — typically 15 to 25 per cent
Waterproofing: The Line You Never Cut
Waterproofing failure is the most common serious defect in Australian residential construction, and Melbourne’s timber-framed floors raise the stakes. In a concrete-slab home a failed membrane damages finishes. In a timber-framed home it destroys structure.
A compliant Melbourne bathroom membrane involves:
- The entire shower floor, and shower walls to at least 1,800mm within the enclosure
- The full bathroom floor where the room is above ground level or over a habitable space — which in a stumped Melbourne home means effectively always
- Wall junctions and floor-wall junctions treated with bond breakers and reinforcing fabric
- Every penetration individually sealed — waste, tap bodies, screen fixings
- Correct falls to the waste, formed in the screed before the membrane rather than corrected with adhesive afterwards
- Adequate curing between coats, and a flood test before tiling where practical
Melbourne’s timber floors also move seasonally with the reactive clay beneath them, which places more demand on membrane flexibility and junction detailing than a slab does. Bond breakers at junctions are not an optional refinement here; they are what allows the membrane to survive a house that expands in July and contracts in February.
Photograph the membrane before tiling and keep the waterproofer’s certificate. See our detailed guide to waterproofing and wet area compliance in Melbourne.
What Melbourne’s Housing Stock Adds
Rotted floor framing
The recurring Melbourne discovery. A bathroom that has leaked slowly through a failed membrane, a cracked shower base, or simply decades of splash at the door threshold will have compromised bearers and joists. Replacement runs $3,000 to $12,000 depending on extent, and it must be done before anything else.
Subfloor moisture
Melbourne’s cool damp climate and low subfloor clearances produce persistently humid crawl spaces. This accelerates rot and encourages termites. While the bathroom floor is open, it is worth improving subfloor ventilation — additional vents cost $400 to $1,200 and materially extend the life of the new work.
Asbestos
Melbourne homes built between roughly 1940 and 1990 frequently have asbestos cement sheeting behind wet area tiles. Licensed removal starts around $2,500 for a small bathroom.
For more detail on this part of the project, see How Much Does a Small Bathroom Renovation Cost?.
Galvanised supply pipe
Pre-1970 Melbourne homes commonly have galvanised steel supply lines that have corroded internally. Replacing back to a serviceable connection runs $2,000 to $6,000, and doing it while the wall is open costs a fraction of doing it later.
Lead paint
Pre-1970 homes may have lead-based paint requiring controlled removal during preparation.
Set a 20 per cent contingency on any bathroom in a pre-1980 Melbourne home. On a pre-1930 weatherboard, 25 per cent is the honest figure.
Design Decisions Worth Making Early
Underfloor heating
More justified in Melbourne than in any other mainland capital. Electric in-screed heating costs $80 to $160 per square metre installed and transforms a bathroom through a Melbourne winter. It must be planned before the screed goes down.
A related guide to consider while planning this work is How to Find and Vet a Renovation Builder in Melbourne.
Hobless showers
A step-free shower with a linear drain requires the floor to be recessed within the shower zone. In a timber-framed Melbourne floor this means altering joists — achievable, but it must be designed and it may require a building permit. Expect $2,200 to $5,500 above a standard shower base.
Ventilation
Melbourne’s cold winters produce condensation problems that warmer cities do not see. Warm moist air from a shower meets cold external walls and single-glazed windows, and mould follows. Specify an inline fan sized to the room, ducted with rigid or semi-rigid ducting and discharged to outside — never into the roof space — with a run-on timer. Consider a heated towel rail and, in a poorly insulated bathroom, wall insulation while the linings are off.
Tile format
Large-format tiles look better and have fewer grout lines, but demand a flatter substrate. In a Melbourne period home with a floor that moves and walls that bow, large format will require levelling work that a 300×600 tile would have forgiven. Budget for it or choose accordingly.
Layout within the footprint
The cheapest good bathroom keeps the toilet over its existing waste and the shower in its corner. In a bathroom under six square metres, the difference between a rearranged layout and a retained one can be $4,000 — which buys a great deal of tapware.
Permits and Compliance in Victoria
A like-for-like bathroom fitout that does not alter structure generally does not require a building permit in Victoria. However, you will need one where the work involves:
- Structural change to the floor, including recessing for a hobless shower
- Removing or altering a load-bearing wall
- Alterations to the building’s waterproofing envelope in some circumstances
- New or relocated external openings
Regardless of permit status:
- Plumbing must be done by a licensed plumber, who issues a compliance certificate
- Electrical work requires a certificate of electrical safety
- Waterproofing must be certified
- A major domestic building contract in writing is required above the statutory threshold, and the builder must hold domestic building insurance and VBA registration
- Apartments require owners corporation approval — see our guide to Melbourne apartment renovation
Our full guide to Melbourne building and planning permits sets out the two-permit system.
Realistic Timelines
A Melbourne bathroom takes two to four weeks on site, with a longer calendar timeline:
- Days 1–3 — strip-out, disposal, inspection of the exposed floor framing
- Days 4–8 — any framing repair, plumbing and electrical rough-in, substrate
- Days 9–12 — screed and falls, waterproofing with curing time between coats
- Days 13–19 — tiling walls and floor, then grouting after adhesive cure
- Days 20–24 — fit-off of tapware, toilet, vanity, screen, electrical
- Days 25–28 — painting, silicone, cleaning and defects
Add lead times for anything custom. A frameless screen is measured after tiling and takes two to three weeks to fabricate. Imported tapware in a specified finish can take six weeks. Order long-lead items before demolition.
Melbourne’s winter adds a practical wrinkle: membranes cure more slowly in cold damp conditions, and a bathroom renovated in July will spend longer waiting between coats than the same job in February. Do not let a builder compress that.
Getting the Quotes Right
Ask every Melbourne bathroom quote to state:
- The waterproofing system by brand and number of coats, and who issues the certificate
- The tile allowance per square metre, and whether it is supply-only or supplied and laid
- Whether tiling is full height, and whether the ceiling is tiled
- Specific tapware and fixture models, not a lump-sum allowance you will exceed
- Whether the shower screen is framed, semi-frameless or frameless
- The exhaust fan model and where it discharges
- Who removes and disposes of waste
- What happens if the floor framing proves to be rotted. In Melbourne this is the question that matters most.
A good Melbourne builder will have an answer ready, usually a rate per square metre for framing replacement. A builder who has not considered it is telling you they have not worked much on this city’s housing stock.
For choosing who does the work, see our guide to vetting a Melbourne renovation builder, and for the wider budget picture, our Melbourne renovation cost guide.
Small Bathrooms and Ensuites
A large share of Melbourne’s Victorian and Edwardian housing has bathrooms under six square metres, frequently carved out of a rear lean-to that was never designed to hold one. Small does not mean cheap: the fixed costs — plumbing mobilisation, waterproofing, electrical, disposal, framing repair — barely change, so a four square metre bathroom often costs 75 per cent of what a seven square metre one costs.
What works in a small Melbourne bathroom:
- A wall-hung vanity with visible floor beneath, which makes the room read larger and simplifies cleaning around an uneven old floor
- A single tile format on floor and walls, reducing visual clutter
- A frameless or single-panel screen rather than a framed enclosure
- A wall-faced or concealed-cistern toilet, saving 100 to 150mm of floor depth
- A recessed shower niche, which must be framed before lining and cannot be added later
- Underfloor heating, which in a small Melbourne bathroom costs very little and transforms winter use
Adding an ensuite costs $16,000 to $32,000 where it can be built adjacent to existing services, and $28,000 to $50,000 where new drainage must be run. In a Melbourne family suburb a second bathroom is one of the highest-returning renovations available, frequently returning two to four times its cost.
Fixtures That Justify Their Price
- Tapware cartridges. Cheap mixers fail at the cartridge, and replacing a wall-mounted mixer means opening a tiled wall. Buy tapware with a genuine Australian warranty and available spare parts.
- The exhaust fan. The highest-value upgrade in a Melbourne bathroom. A $600 inline fan properly ducted outside prevents the mould that this city’s winters otherwise guarantee, and outperforms a $90 ceiling unit by a wide margin.
- The shower screen. A 10mm toughened frameless panel with quality hardware lasts twenty years; cheap hinges corrode in five.
- The vanity carcass. Moisture-resistant board and quality runners. Standard particle board under a basin swells within a decade, faster in a damp Melbourne bathroom.
- Wall insulation. While the linings are off, insulating the bathroom’s external walls costs a few hundred dollars and makes the room usable on a July morning.
- The waste and trap. Accessible and serviceable. A tiled-in trap that cannot be reached is a future demolition job.
Where restraint is sensible: designer tiles above roughly $90 per square metre rarely read better than a well-laid $50 tile; premium toilet suites deliver diminishing returns above mid-range; and heated towel rails, while pleasant, are a comfort item rather than a value item.