Full Bathroom Renovations: What’s Included, What It Costs, and What to Ask Before You Sign
Every full bathroom renovation starts with decisions that have already been made before the first trade arrives on site — scope definition, waterproofing compliance, tile specification, fixture selection. Get those right and the job runs close to budget. Get them wrong and variations start appearing before the second week is done.
This guide covers what a complete renovation actually includes — and what’s often missing from quotes — what it typically costs across NSW and ACT, how long the trade sequence takes, and what to have locked in before work starts.
What a Full Bathroom Renovation Actually Includes
A ‘full bathroom renovation’ means different things to different quotes. The definition matters — because the gap between what a homeowner expects and what a quote actually covers is where most budget blowouts originate. Knowing what should be in the scope before you request quotes is the most useful preparation you can do.
A complete scope covers six distinct work stages. Each one depends on the previous being done correctly. Skipping or under-specifying any stage doesn’t reduce the work — it transfers the cost to a later repair job, often after the next owner has moved in.
Removal of the existing vanity, toilet, bath or shower, wall and floor tiles, substrate sheeting, and any accessible waterproofing layer. Includes waste removal and site preparation. Scope varies depending on whether tiles are full-height or partial, and the condition of the substrate once exposed.
Compliant wet area waterproofing to AS 3740, applied by a licenced waterproofer. Compressed fibre cement sheeting to all wet area walls. The membrane is inspected before tiling commences — cure time is built into the trade sequence, not skipped to save a day.
Wall and floor tiling to specified layout, tile format, and grout joint width. Adhesive, grout, and silicone movement joints at all internal corners and changes of plane. Substrate levelling compound where the existing floor doesn’t meet the flatness tolerances required for the specified tile size.
Installation of toilet suite, vanity and basin, shower screen or bath, tapware, and fixed accessories. Plumbing and electrical connections included where licenced tradespeople are coordinated as part of the scope. Confirm whether fixtures are contractor-supplied to an allowance or homeowner-supplied before signing.
Silicone caulking at all junctions and movement joints. Paint touch-up or full repaint of affected wall areas. Full site clean. Defect inspection walk-through with the homeowner before handover.
What’s Often Not Included — and Where Quote Gaps Appear
The scope items that generate the most variation disputes are the ones that are easiest to leave out of a quote — either because the quoting tradesperson assumed they weren’t needed, or because they were omitted deliberately to price competitively. Both produce the same result: unexpected costs mid-job.
The items below are frequently absent from quotes or listed as ‘PC allowance’ items with no clear scope attached. Check each one explicitly before comparing quotes.
A quote that lists these items clearly — with a scope note against each — is a more reliable basis for comparison than one that leads with a total figure. Cheaper total on a quote that omits floor levelling, waterproofing labour, and HBC insurance isn’t cheaper. It’s incomplete.
What a Full Bathroom Renovation Costs in NSW and ACT
The figures below are directional industry estimates — not quotes. A bathroom renovation cost is determined by scope, site conditions, material selections, and how complete and honest the quote is about what it actually includes. The same job quoted by two different contractors can differ by $4,000–$8,000 before a single specification decision is changed.
Ranges below assume a standard 3×2m–4×2m bathroom, full strip to substrate, and no structural changes or plumbing relocation.
What pushes a renovation toward the upper end: large-format tiles with substrate levelling required; stone or mosaic specified; plumbing or electrical relocated; existing substrate found to be compromised after strip-out; heritage property or difficult site access; a staged trade program forced by site constraints.
What keeps a renovation toward the lower end: standard format porcelain on a sound substrate; no plumbing or electrical relocation; fixtures supplied by owner within a defined budget; full scope agreed in writing before work starts with no mid-job variations.
A quote significantly below the lower end of these ranges deserves scrutiny before signature. The most common reasons: floor levelling omitted, waterproofing labour not included, fixture supply not allowed for, HBC insurance not arranged. Cheaper on paper. More expensive in practice.
How Long Does a Full Bathroom Renovation Take?
A full renovation is a sequenced trade program — each stage depends on the previous one being complete, inspected, and signed off before the next trade arrives. Trying to compress the sequence is how waterproofing failures happen. The bathroom is genuinely unusable for the duration. Realistic program management matters more than the theoretical shortest possible duration.
Typical trade sequence for a full bathroom renovation:
Strip-out & disposal — 1–2 days
Removal of existing fixtures, tiles, and substrate sheeting. Site prepared for rough-in inspection if required. Condition of the hidden substrate is assessed here — if it’s compromised, the program adjusts at this point rather than after tiling has started.
Rough-in plumbing & electrical — 1–2 days
Any new pipe runs or additional circuit work completed before substrate sheets are fixed. These trades return later for final connections, but the rough-in must happen before the walls are closed up. Rescheduling after tiling starts is expensive.
Substrate & waterproofing — 2–4 days (including mandatory cure time)
Compressed fibre cement sheet fixed to framing. Waterproofing membrane applied by a licenced waterproofer, inspected, and allowed to cure to manufacturer specification. This stage cannot be compressed — cure time is a compliance requirement, not a scheduling preference.
Tiling — 3–5 days
Floor and wall tiles laid to specified layout and format. Adhesive sets between floor and wall sessions where required. Grout and silicone sealant applied as the final step, including movement joints at all internal corners and changes of plane.
Fixture installation — 1–2 days
Vanity, toilet suite, shower screen, bath if included, tapware, and accessories installed. Plumber and electrician return for final connections and commissioning.
Finishes, clean & inspection — 1–2 days
Caulking at all junctions and movement joints. Paint touch-up of affected areas. Full site clean. Defect inspection walk-through with the homeowner before handover.
Total: 15–25 working days for a standard bathroom. Add 5–10 days for complex specifications, difficult access, or heritage constraints.
The most common reasons a 15-day program becomes a 35-day program: waterproofing membrane failing inspection and requiring re-application; tiled-over substrate found to be compromised after strip-out; fixture supply arriving incomplete mid-installation; trades not sequenced in advance and competing for the same booking window; variations agreed verbally mid-job without scope or cost confirmed in writing.
Compliance Requirements You Need to Know Before Work Starts
A full bathroom renovation in NSW and ACT involves licenced work and mandatory compliance standards. Most homeowners aren’t expected to know these in detail. But knowing they exist — and confirming that the contractor you’re engaging is accounting for them — is the difference between a renovation that passes inspection and one that doesn’t.
Seven compliance items to confirm before work starts:
Waterproofing to AS 3740
Required in all wet areas. Must be completed by a licenced waterproofer. The membrane is inspected before tiling commences — not assumed present simply because tiling happened.
Slip resistance to AS 4586
P3 minimum for a wet barefoot bathroom floor. P4 required for shower floors and bath surrounds. The P-rating is on the tile product data sheet — confirm it before ordering, not after installation.
Plumbing by licenced plumber
Any fixture connection or relocation requires a licenced plumber in NSW and ACT. Ask for the licence number before work starts. A Certificate of Compliance is issued on completion.
Electrical by licenced electrician
New circuits, exhaust fan installations, and heated floor systems require a licenced electrician. A defect report is issued on completion.
HBC insurance (NSW — work over $20,000)
Home Building Compensation insurance is required for residential work over $20,000 in NSW. The contractor provides the certificate before work begins. If they can’t produce it, the work is not insured.
Building consent or DA
Like-for-like bathroom renovations typically don’t require DA. Relocating the plumbing stack, structural wall changes, or window and door modifications may. A certifier can confirm for your specific site.
NCC Vol 2 minimum standards
Sets requirements for fixture clearances, ventilation, wet area construction, and accessible design where relevant. Ask your contractor whether they’re working to NCC. A blank look is informative.
Related: Waterproofing compliance in NSW and ACT is governed by AS 3740. See our AS 3740 waterproofing compliance guide ›
Related: NCC bathroom standards and what they require in a residential renovation. See our NCC bathroom standards guide ›
Not Sure What Should Be in Your Quote?
Tell us about the scope and the bathroom. We’ll connect you with a vetted specialist who can review it properly and walk through exactly what should — and shouldn’t — be in the quote.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. We connect homeowners and property professionals in NSW and ACT with vetted bathroom renovation specialists.
Before You Sign Off on a Full Bathroom Renovation Quote
Nine things worth confirming before work starts. Not a complete specification document — a checklist for the questions that get skipped most often, and that produce the most avoidable problems and disputes when they do.
Strip-out scope clearly defined
What comes out, what stays, and what gets disposed of. Ambiguity here generates day-one variations before tools have been picked up.
Waterproofing specification and licence confirmed
Which membrane, which areas, which licenced waterproofer. Ask for the licence number before work starts — not on day one.
Substrate type and preparation method itemised
Compressed fibre cement, thickness specified, fixing method and termination details confirmed. Not implied or assumed by either party.
Tile P-ratings confirmed per location
P3 for bathroom floor, P4 for shower floor and bath surround. Confirmed against the product data sheet — not the showroom display card.
Adhesive type specified
Flexible adhesive for large-format tiles, heated floors, or any installation with expected substrate movement. Standard set adhesive is not appropriate in those contexts.
Movement joints at all internal corners
Silicone sealant, not grout, at every change of plane and internal corner. If the quote says grout at the bath junction, correct it before work starts.
Fixtures and tapware supply clearly defined
Contractor-supplied to an allowance, or homeowner-supplied. Who carries the lead time risk if something arrives late, damaged, or in the wrong colour.
Plumbing and electrical itemised separately
Each licenced trade scoped and quoted individually. Not bundled as an unspecified ‘all trades included’ line.
HBC insurance arranged (NSW, where applicable)
Certificate in hand before work commences. Not promised verbally, and not ‘being arranged’ during the job.
Common Questions
Strip-out and disposal, wet area waterproofing to AS 3740, substrate installation (compressed fibre cement sheeting), tiling including adhesive, grout, and silicone movement joints, fixture installation — toilet, vanity, shower screen, bath if applicable, tapware — plus plumbing connections, electrical connections, finishes, and a defect inspection walk-through on completion.
What it doesn’t automatically include: floor levelling compound (often a site condition extra confirmed after strip-out), plumbing relocation, electrical upgrades, door or window changes, and HBC insurance unless specifically listed in the scope.
The safest way to know what’s in your quote: read the scope description line by line, not just the total figure.
Entry-level full renovations — standard fixtures, ceramic or budget porcelain tile — typically run $13,000–$18,000 for a standard bathroom. Mid-range jobs with quality tapware, porcelain tiling, and a frameless shower screen sit between $18,000–$32,000. Premium finishes, stone, large-format tile, and custom joinery push past $32,000 — sometimes significantly.
Those are directional estimates. The actual cost is determined by scope definition, site conditions, and how complete the quote is. A quote missing floor levelling, waterproofing labour, and HBC insurance isn’t cheaper — it’s incomplete. The variation shows up mid-job instead.
Standard bathroom, sound substrate, trades sequenced in advance: 15–25 working days from strip-out to final clean and handover.
That assumes waterproofing passes inspection first time, the substrate is in good condition after strip-out, fixtures arrive on schedule, and no variations are requested once work starts. Any of those going sideways adds days — sometimes weeks.
The bathroom is genuinely unusable for most of this period. Planning for the disruption before work starts — alternative bathroom access, or accommodation if needed — is worth sorting in advance, not once the tiles are already out.
For a like-for-like renovation — same layout, no structural changes, no plumbing stack relocation — most residential bathroom renovations in NSW don’t require a DA. The licenced trades involved issue their own compliance certificates.
DA or CDC approval becomes relevant if you’re relocating the plumbing stack, modifying a loadbearing wall, changing a window or door opening, or the property is heritage-listed or in a heritage overlay. If you’re in any doubt, a private certifier can give you a clear answer for your specific site much faster than waiting on council.
A refresh replaces fixtures and fittings without touching the substrate or waterproofing — new tapware, a new vanity, maybe a new toilet suite. It’s faster and cheaper, and it’s the right call when the underlying structure is sound and still compliant.
A full renovation strips the bathroom back to framing, replaces the waterproofing membrane, relays the substrate, and retiles from scratch. Right approach when the waterproofing is at end of life, when tiling is cracking or lifting, or when the layout is changing.
Choosing between them incorrectly costs money in both directions. A refresh over a compromised waterproofing layer puts new fixtures on top of a problem that hasn’t gone away. A full renovation on a bathroom that only needed a refresh spends budget that could go elsewhere. The strip-out stage tells you which one you actually needed — by then, you’ve already committed.