Bathrooms are the most expensive room per square metre to renovate anywhere in Australia, and Canberra adds its own layers. The climate makes underfloor heating a near-standard inclusion rather than a luxury, the ex-government housing stock puts bathrooms on suspended timber floors over unheated subfloors where pipes freeze, and every pre-1980 house carries the loose-fill asbestos question before a single tile comes off.
This guide sets out what a bathroom renovation actually costs here in 2026, how long each tier takes, and what the local stock does to the number.
The Cost Tiers
$13,000 to $18,000 — cosmetic refresh
Existing tiles and waterproofing stay. New vanity, tapware, toilet, mirror, shower screen, towel rails and lighting, often with professional tile resurfacing or regrouting.
- Timeline: one to two weeks
- Best for: a sound bathroom with tiling you can live with
- Risk: if the membrane has failed, you are putting new fixtures into a room that needs a full rebuild in three years
$19,000 to $25,000 — partial rebuild
Shower and bath surrounds stripped and re-waterproofed, the rest re-tiled with stock product or left. Stock vanity, stock tapware, standard screen. Three to four weeks.
$26,000 to $38,000 — full renovation, the Canberra median
- Complete strip-out to substrate, new plumbing and electrical rough-in
- Full waterproofing to AS 3740 with a flood test
- Floor-to-ceiling tiling
- Mid-tier vanity with a stone top, quality tapware
- Ducted exhaust to outside with a run-on timer
- Electric underfloor heating in the screed — close to standard here
- Heated towel rail, new lighting, and making good the adjoining hallway
- Timeline: four to six weeks
$42,000 to $72,000 — premium
- Large-format porcelain, minimal grout lines
- Freestanding bath and frameless walk-in shower with a linear drain
- Designer tapware, wall-mounted mixers, concealed cisterns
- Hydronic or electric underfloor heating, heated towel rails, and often a heated mirror
- Custom joinery vanity, niches with contrasting tile, shadow-line ceiling detail
- Timeline: six to ten weeks
$78,000 and above — luxury
Stone slab wall linings, imported European fixtures, bespoke vanities, thermostatic mixing. Eight to fourteen weeks, with imported fixture lead times usually driving the program.
Why Small Bathrooms Cost More Per Square Metre
Canberra bathroom work runs roughly $3,000 to $4,000 per square metre for a compact room and $2,500 to $3,100 for a large one. The fixed costs do not shrink:
- Waterproofing carries a minimum charge regardless of area
- The plumber needs the same number of visits
- The tiler’s set-up, cutting and clean-up barely changes
- The fixture count is the same
- Small rooms have proportionally more cutting, corners and awkward detailing
Renovating two bathrooms together saves 15 to 25 per cent compared with doing them a year apart — and in an ex-government house, adding a second bathroom is usually the highest-return structural change available.
The Canberra-Specific Items
Underfloor heating
In a city with around a hundred frosts a year, a heated bathroom floor is not a luxury item. Electric in-screed heating adds $1,500 to $4,000 to a bathroom renovation and it is one of the few upgrades that people consistently say they would pay for again. Where a hydronic system is being installed elsewhere in the house, running a bathroom circuit off it is cheaper again.
Pipework and frost
Bathrooms in ex-government houses sit on suspended timber floors over ventilated subfloors, and pipework in that space freezes. Burst pipes in a Canberra winter are a real event rather than a theoretical one.
- Lag all pipework in unheated spaces — subfloor, external walls, the roof space
- Do it during a replumb while access is open, when it costs almost nothing
- Trades who have worked mainly in warmer cities routinely omit this. Specify it in writing.
- Maintain subfloor ventilation while insulating underfloor — insulate the floor, do not seal the subfloor
Winter condensation
In a cold climate, condensation forms on the inside of cold surfaces. A Canberra bathroom needs:
- Mechanical extraction ducted to outside, correctly sized, with a run-on timer of at least ten to fifteen minutes
- A make-up air path — a gap under the door or a transfer vent, because a fan cannot extract from a sealed room
- Insulated ductwork, as short and straight as practical, so it does not condense internally and drip back
- Insulation continuity around the room, because a thermal bridge is where the condensation and then the mould appears
- Never vent into the roof space, which wets the ceiling insulation and grows mould in the cavity
Loose-fill asbestos
Before any bathroom strip-out in a pre-1980 Canberra house, commission a licensed asbestos assessor. Loose-fill amosite insulation was installed in more than 1,000 homes in the 1960s and 1970s, material remained after the 1988 to 1993 removal program in wall cavities, subfloors and behind cornices, and the ACT government has acknowledged it is probably still present. A standard building inspection does not cover it, and a bathroom strip-out opens exactly the cavities where it sits.
Bonded asbestos
Separately, bonded asbestos cement sheet behind tiles, in ceilings and around baths is common in stock from the late 1940s to 1987. Licensed removal is $60 to $120 per square metre, adding $2,500 to $7,000 to a whole-bathroom job including the clearance certificate.
The Other Line Items That Blow the Budget
- Relocating the toilet: $2,500 to $4,500 in soil stack work, more on a slab.
- Rotted floor structure under a leaking shower on a suspended timber floor: $2,000 to $6,000, and it cannot be skipped.
- Switchboard upgrade: $1,400 to $3,200. A modern bathroom needs a dedicated heating circuit, a safety switch and IP-rated fittings, and a ceramic fuse board cannot carry it.
- Tiles: $40 to $70 per square metre for stock ceramic against $130 to $260 for imported porcelain, plus higher laying rates for large-format.
Waterproofing
Must comply with AS 3740 and be carried out by an appropriately licensed person, with the certificate forming part of your handover documentation.
- Substrate clean, dry, primed and dust-free before the membrane goes on
- Bond breakers and reinforcing at all internal corners and wall-floor junctions
- Membrane turned up the walls to the correct height — the full shower enclosure to at least 1800mm
- Correct number of coats at the correct wet film thickness, each properly cured. In a Canberra winter, cure times are longer than the data sheet’s minimum — a cold room does not cure a membrane on schedule, and this is where winter jobs go wrong.
- Puddle flange correctly bedded, with the membrane dressed into it
- Falls set into the screed, not corrected with tile adhesive
- A flood test before tiling, with photographs
- Silicone, not grout, at every internal corner
Photograph every stage yourself. More detail is in waterproofing and wet area compliance in Canberra.
The Realistic Timeline
A full $32,000 Canberra bathroom, no surprises:
- Days 1–3: Strip out to substrate, remove fixtures, dispose of waste. Bonded asbestos removal adds two to four days plus clearance.
- Days 4–8: Carpentry — repair or replace floor structure, noggings for fixings, frame new walls and niches, re-sheet.
- Days 9–13: Plumbing and electrical rough-in, including the exhaust duct to outside, the pipe lagging and the underfloor heating circuit.
- Days 14–16: Wall sheeting and screed, floor falls set, underfloor heating mat laid in.
- Days 17–22: Waterproofing in coats with curing between, then flood test. Longer in winter.
- Days 23–31: Tiling — floor, walls, grouting, silicone. The longest single trade block.
- Days 32–35: Plumbing and electrical fit-off, vanity and mirror install, heating commissioned.
- Days 36–41: Shower screen measure and install. Cannot be measured until tiling is complete, which adds a five to ten business day gap.
- Days 42–44: Painting, door adjustment, final clean, defect walk-through.
Six weeks is realistic with no complications. Winter jobs run longer because of curing and drying times.
Approvals
- A bathroom renovation within the existing footprint that does not alter structure is generally exempt from a development application
- Building approval and a building commencement notice from a private certifier are required where structure is altered, and commonly for full wet area rebuilds
- Plumbing and electrical work requires licensed trades and compliance certification regardless
- Residential building work insurance is mandatory for residential building work on houses of three storeys and below, must be obtained before the builder applies for the commencement notice, and evidence must be provided to you. Minimum cover rose to $200,000 on 1 January 2025.
Adding a Second Bathroom
Most ex-government houses have one bathroom and a separate toilet, which is why this is the highest-return structural change available in Canberra’s most common housing type.
For more detail on this part of the project, see Renovating an Ex-Government House in Canberra: A Practical Guide.
- Ensuite within the existing footprint: $27,000 to $45,000, taking space from an oversized main bedroom. Cheapest where it backs onto the existing bathroom wall and shares the stack.
- Combining the existing bathroom and separate toilet into one larger room and adding an ensuite elsewhere — often the neatest solution in these plans.
- Powder room or second toilet: $12,000 to $22,000. Needs roughly 900 by 1500 millimetres and access to a drain line.
- Second bathroom in a new extension: $32,000 to $52,000, with drainage and layout designed rather than worked around.
- Converting a laundry: often good value, since drainage and substrate are already close to what is required. Relocating the laundry costs $5,000 to $14,000.
The constraint is always drainage. Have a plumber walk the house and identify the viable positions before a designer draws anything.
Where to Spend and Where to Save
Worth the money
- Waterproofing and the trades that do it.
- Underfloor heating. The Canberra-specific inclusion that people are consistently glad they paid for.
- A properly ducted exhaust to outside with a run-on timer and a make-up air path.
- Pipe lagging in every unheated space.
- Tapware with Australian parts availability.
- Floor waste position and fall, which cost nothing to get right and are permanent.
Sensible savings
- Keep fixture positions
- Semi-frameless screen over frameless — $600 to $1,500 difference for a small visual gain
- Standard-width vanities with a good top
- Stock large-format porcelain, which looks close to imported at a third of the price and lays for the same cost
- One tile family in two formats rather than three products
Comparing Quotes
Canberra bathroom quotes commonly spread 30 to 60 per cent. Check each for:
- Whether the loose-fill asbestos assessment is allowed for or excluded
- Whether bonded asbestos testing and removal is included
- Whether repairing rotted floor structure is included or a variation
- Whether underfloor heating is included, and at what coverage
- Whether pipe lagging in unheated spaces is specified
- Whether the exhaust is ducted to outside with a make-up air path, and the duct run is priced
- Whether tiles, tapware and vanity are named products or provisional sums
- Whether tiling is to ceiling or to 2100mm
- Whether waterproofing certification and photographic evidence is provided
- Whether a switchboard upgrade is allowed for
Equalise those and the quotes usually converge within 15 per cent, at which point you are choosing on the builder. That process is in how to find and vet a renovation builder in Canberra, and the wider budget picture is in the Canberra renovation cost guide.
Designing a Bathroom That Works in a Cold Climate
Most Australian bathroom design guidance assumes the problems are moisture and space. In Canberra there is a third: the room is cold, and everything about how it is used follows from that.
For more detail on this part of the project, see How to Find and Vet a Renovation Builder in Canberra.
The decisions that matter
- Underfloor heating, which changes the room more than any finish. Electric in-screed is $1,500 to $4,000; a hydronic circuit off a whole-house system is cheaper again where one exists.
- A heated towel rail that is actually sized for the towels, on a timer or a switch rather than left on permanently.
- Insulate the walls and ceiling of the bathroom itself, particularly any external wall. A wet room with a cold external wall grows mould in the corner regardless of the extraction.
- A fan-light-heat unit or a separate radiant heater for immediate warmth, in addition to the underfloor rather than instead of it.
- Avoid large areas of cold glass. A big single-glazed bathroom window streams with condensation and loses heat fast. Double glaze it or reduce it.
- Warm-toned, matt finishes rather than large expanses of cold gloss tile, which is an aesthetic point with a real perceptual effect.
- Position the shower away from the coldest wall where the plan allows.
- Insulate and lag the hot water run so the shower runs hot quickly — a long uninsulated run in an unheated subfloor wastes water and patience every morning.
Ventilation without heat loss
The tension in a cold-climate bathroom is that you must extract moisture and you do not want to extract the heat with it.
- A correctly sized fan with a run-on timer, ducted to outside, rather than an oversized one running constantly
- A make-up air path so the fan actually works
- Insulated ductwork, short and straight, so it does not condense internally
- In a comprehensively sealed house, a heat recovery ventilation system extracting from the bathroom recovers most of the heat from the outgoing air — the most elegant answer, and worth considering where a whole-house renovation is underway
Living Without a Bathroom in Winter
A four to six week bathroom renovation is an inconvenience in Brisbane. In Canberra between May and September it is a genuine planning problem, and households consistently underestimate it.
- Confirm which bathroom stays operational and whether it is heated. A second bathroom in an unheated part of the house is not a solution.
- If there is only one bathroom, plan to be elsewhere for the strip-out and rough-in period at minimum. Camping in a house with no functioning bathroom in July is different from doing it in February.
- Confirm whether the hot water system is affected and for how long.
- Ask about the waterproofing block specifically. Cure times lengthen in the cold, so the period with no usable room is longer than the summer equivalent. If the builder is heating the work area to keep the program, ask how, and make sure it does not mean the rest of the house is open to the weather.
- Consider timing the job for the warmer months if you can. A winter bathroom renovation either costs more in temporary heating or takes longer, and both are avoidable by scheduling.
- Keep one heated room fully functional as a retreat throughout, with the door sealed against dust.