Bathroom Renovations Sydney CBD
Most bathroom renovations in a CBD apartment go wrong before the tiler even arrives. The owners corporation hasn’t approved the scope. The contractor hasn’t worked in a high-rise before. The quote didn’t include waterproofing.
Lifestyle Bathrooms connects homeowners and property professionals in Sydney CBD with licenced renovation specialists who’ve done this kind of job — in this kind of building — and know what it actually takes to get it done properly.
Lifestyle Bathrooms is a referral and connector service, not a licenced contractor. All renovation work is carried out by licenced specialists connected through our platform.
Renovating a CBD Apartment Bathroom Isn’t the Same Job as Renovating a House
Before the first tile goes up, a CBD apartment renovation is a logistics problem. There’s no kerb-side parking for a tradie’s ute. The building requires a loading dock booking — usually with 48 hours’ notice. Lift use has to be coordinated with the building manager. Noise restrictions in the City of Sydney LGA run 8am to 5pm on weekdays. A contractor who hasn’t worked in these buildings before will underestimate every one of those constraints, and the schedule and cost consequence lands squarely on you.
Compact bathroom footprints — typically 4 to 7 square metres in a CBD apartment — demand a different approach than a suburban ensuite. There’s no forgiving distance between the shower floor tile, the vanity edge, and the toilet suite. Every specification decision is visible from every other point in the room. Waterproofing continuity in a 5m² wet area is less tolerant of shortcuts than a larger bathroom, not more.
A significant proportion of CBD apartment buildings constructed in the 1990s and early 2000s are now at the point where the original waterproofing membrane is at or past its service life. When that membrane fails in a high-rise, the water doesn’t stop at your bathroom floor. It finds the apartment below. The strata liability implications of that outcome are considerably more expensive than the cost of replacing the membrane during a renovation you were planning anyway.
The right contractor for a CBD apartment bathroom has done it before — has managed the building manager relationship, has produced the strata documentation the owners corporation needs, and understands that starting without OC approval isn’t a minor procedural oversight. It’s the kind of mistake that gets work ordered off the wall.
Your Owners Corporation Has to Approve This First
If your apartment is within a strata scheme — and almost every CBD apartment is — your owners corporation has to approve renovation work that affects waterproofing, structural elements, or common property before any contractor sets foot in the building. That approval isn’t a formality. It’s a condition. Without it, you don’t have a renovation. You have an unauthorised building works dispute in progress.
What ‘affecting waterproofing’ means in practice: nearly every full bathroom renovation in an apartment does. If you’re stripping back to the substrate for a retile — which any honest renovation involving membrane replacement requires — you’re touching the wet area waterproofing system. That brings the OC into the picture. The idea that you can quietly redo a bathroom without strata involvement only works if you’re doing a purely cosmetic refresh over undisturbed existing surfaces. The moment you’re opening up wet area substrate, you need the OC on board first.
The OC approval process involves a written application to your strata manager or owners corporation committee, supported by a scope of works, contractor licencing documentation, public liability insurance evidence, and a check against the scheme’s by-laws. Some owners corporations turn this around in two weeks. Others require it to be tabled at a committee meeting. A few will want it on the AGM agenda. Build the timeline around the OC’s process, not the contractor’s availability.
Important: Work started without owners corporation approval can be ordered to be removed — at the lot owner’s expense. That cost sits with you, not with the contractor who did the work. It’s not an edge case. It happens. Confirm OC approval before anything is booked.
Lifestyle Bathrooms connects you with contractors who are experienced in preparing strata documentation packages. That experience matters. A contractor who’s done this in CBD strata buildings before knows what an OC actually needs to see — and knows that skipping the approval step isn’t a shortcut. It’s a liability transfer onto the homeowner.
Related: Development consent and complying development requirements vary by work type and strata scheme. See our guide to renovation approvals and permits ›
What the Work Actually Covers
A full bathroom renovation in a CBD apartment isn’t a list of visible upgrades. It’s a layered construction process, and most of the critical work happens before anything looks different.
Waterproofing is the foundation. In NSW, wet area waterproofing must be installed to AS 3740 — that’s not optional, and it’s not a specification that can be left to the contractor’s judgement. The membrane has to be installed and inspected before any tiling commences, and a certificate of compliance is issued at completion. That certificate is a document you keep. It’s relevant to future sale, strata records, and building insurance. Any renovation scope that doesn’t include waterproofing membrane replacement in a bathroom that’s being stripped back to substrate is cutting a corner worth asking about.
Tiling in a compact wet area has compliance requirements of its own. Shower floor tiles need to meet a P4 slip resistance rating under AS 4586. Large-format tiles need a substrate flat to within 3mm over 3 metres — most existing bathroom substrates don’t meet that without levelling compound, which needs to be in the quote. Movement joints at internal corners and changes of plane require flexible silicone, not grout. These aren’t details that come up after the job starts. They’re specification items that belong in the scope before the first tile is ordered.
Fixtures and tapware in a compact bathroom require more considered selection than in a larger space. A wall-hung vanity versus a floor-mounted unit changes how the room reads. A recessed niche versus a surface-mounted shelf affects waterproofing continuity. Shower screen configuration affects drainage fall geometry. These decisions interact with the construction sequence — they’re not finish selections you make at the end.
Services work often surfaces during demolition: degraded hot water connections, inadequate exhaust ventilation, drainage falls that don’t meet current standards. The honest way to handle those is to scope them upfront — or to document them as conditional items in the quote — rather than presenting them as variations after walls are open and negotiating leverage has transferred entirely to the contractor.
Related: All wet area waterproofing in NSW must be installed and certified to AS 3740. See our AS 3740 waterproofing compliance guide ›
What a CBD Apartment Bathroom Renovation Costs
Cost in a CBD apartment bathroom is not the same as cost in a suburban house, and a guide that doesn’t acknowledge that isn’t giving you useful numbers. Building access, noise restriction windows, waste removal logistics in a high-rise, and strata-specific documentation all add time and cost that don’t appear in a generic renovation cost estimate. They’re real, they’re predictable, and they belong in any honest quote for this kind of work.
The figures below are directional industry estimates. They are not quotes. Scope, existing substrate condition, building access requirements, fixture selection, and what the tiler actually finds when walls open will all move these numbers. A quote is the only reliable figure for your project.
A quote significantly below the lower end of these ranges for the scope you’ve described is telling you something. Either scope items are missing — substrate preparation and building access logistics are the most commonly omitted — or they’re priced in a way that will generate variations once the job is underway. Neither is a saving.
The strata access and waste removal line items are worth singling out: these are real costs in a CBD high-rise that don’t exist on a suburban job. A quote that doesn’t include them hasn’t been prepared with an honest understanding of what this kind of work costs to deliver.
These figures are directional industry estimates only. They are not quotes. Scope, substrate condition, building access requirements, and strata-specific factors affect final cost significantly. Request a quote for your specific project.
Related: For a broader breakdown of renovation costs across different specs and scopes, see the full bathroom renovation cost guide › and our budget vs. premium comparison ›
Ready to Get a Quote for Your Sydney CBD Bathroom?
Tell us about the bathroom and the building. We’ll connect you with licenced specialists who work in CBD and inner-city apartment buildings — and who understand what strata documentation, compact wet areas, and high-rise access actually involve.
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.
How the Renovation Actually Happens
Six stages. The sequence matters — particularly steps two and four, which are where CBD apartment renovations most commonly get delayed or compromised when they’re not managed properly from the start.
Initial consultation and scope
Site visit or virtual consult to assess bathroom dimensions, existing substrate condition, fixture preferences, and budget range. Strata scheme status confirmed at this stage — before a scope is prepared, not after it’s been handed to the OC with the wrong information in it.
Owners corporation approval
Scope of works prepared in a format the OC can act on. Contractor licencing and insurance documentation assembled. Application submitted to the strata manager or owners corporation committee. Budget for two to six weeks. Plan for the slower end and be pleasantly surprised.
Detailed quote and sign-off
Itemised quote covering demolition, waterproofing, substrate preparation, tiling, fixtures, tapware, and services. Building access and waste removal included as explicit line items. NSW Fair Trading licenced contractor confirmed on the quote documentation.
Demolition and substrate assessment
Strip-out conducted within building noise restriction windows. Full substrate inspection on exposure. Any additional work identified at this stage is documented and approved before the job continues — not charged as a surprise at handover.
Waterproofing, tiling, and fitout
Membrane installed to AS 3740 and inspected before tiling commences. Tiling sequenced to the waterproofing holdover period. Fixtures, tapware, and services work installed to sequence. Certificate of compliance issued by the licenced waterproofer at membrane completion.
Inspection and handover
Final inspection against agreed scope. Defects identified and resolved before sign-off — not after. Statutory warranty documentation provided. Building manager notified of project completion per strata requirements agreed at the start.
Licencing, Insurance, and Compliance: What Applies to Your Renovation
These aren’t bureaucratic footnotes. They’re the documents that protect you if something goes wrong — and in a strata building, the consequences of unlicenced or uninsured work extend beyond your own bathroom.
NSW Fair Trading contractor licence
All renovation work in NSW must be carried out by a licenced contractor. The licence category and currency is publicly verifiable on the NSW Fair Trading register. An unlicenced contractor cannot issue a certificate of compliance. They cannot provide HBCF insurance. And in a strata context, the owners corporation will typically require licence documentation before granting approval. Verify the licence before you sign — not after the job is in progress.
HBCF insurance
Home Building Compensation Fund insurance is mandatory for residential building contracts over $20,000 in NSW. It protects the homeowner if the contractor becomes insolvent, disappears, or fails to complete the work. Most full CBD apartment bathroom renovations will exceed that threshold. Ask for HBCF evidence before signing. If the contractor can’t provide it for a contract over $20,000, that’s a disqualifying issue, not a minor administrative gap.
AS 3740 waterproofing compliance
The waterproofing membrane in every wet area must be installed to AS 3740 and certified by the licenced waterproofer on completion. That certificate is yours to hold — it’s relevant to future sale, to your strata records, and to building insurance claims if water damage is ever alleged. A renovation that doesn’t produce this document hasn’t been completed to the required standard.
Certificates of compliance for plumbing
In NSW, licenced plumbers are required to issue a Certificate of Compliance for certain plumbing and drainage work. If your renovation includes services work — relocating tapware, replacing drainage, extending hot water connections — confirm which certificates apply to your scope and that they’ll be issued at completion. This is a conversation to have before work starts.
Common Questions About Sydney CBD Bathroom Renovations
In most cases, yes — and the threshold is lower than most apartment owners expect. Work that affects waterproofing, structural elements, or common property in a strata scheme requires OC approval before work commences. In a full bathroom renovation that involves stripping back to substrate and replacing the waterproofing membrane, that threshold is almost always crossed.
Starting work without approval isn’t a technical oversight you can smooth over later. The OC has the authority to require completed work to be removed. That cost sits with the lot owner, not the contractor. Get the approval in writing before anything is booked.
The construction phase itself — for a compact full renovation — typically runs two to three weeks. That’s the visible part. The full project timeline is another matter.
OC approval adds two to six weeks depending on how your strata scheme operates. Building access scheduling, waterproofing cure hold periods, and the practical constraints of working within a noise restriction window extend the construction phase slightly compared with a suburban job. From initial engagement to handover, a realistic estimate for a CBD apartment renovation is six to twelve weeks — with the strata variable being the part you have least control over. Plan for it rather than being surprised by it.
For a standard compact full renovation — full strip-out, waterproofing membrane, tiling, fixtures, and tapware — the directional range is $12,000 to $28,000 depending on specification. Premium finishes, stone tiles, custom joinery, or significant services work push beyond that.
CBD-specific factors — building access logistics, loading dock coordination, noise restriction scheduling, high-rise waste removal — add real cost that doesn’t appear in a generic renovation estimate. A quote that doesn’t include those items isn’t cheaper. It’s incomplete.
See the cost table on this page for a detailed breakdown, and the full renovation cost guide for broader context.
In the vast majority of cases, yes. If you’re stripping back to the substrate — which any honest renovation involving old tiling over a membrane approaching end-of-service life should include — then the existing membrane has to come out. Tiling over an old membrane without replacing and certifying it doesn’t satisfy AS 3740 compliance. It also doesn’t make the existing membrane last longer.
Waterproofing membrane failure in a high-rise isn’t just your problem. Water travels to the apartment below. In a strata building, the consequences include damage claims, strata levies to remediate common property, and the kind of neighbour dispute that doesn’t resolve quickly.
A renovation that preserves the existing membrane and tiles over it might cost slightly less upfront. The risk profile of that decision — in a CBD apartment, in a building where the original membrane may be fifteen or twenty years old — is worth weighing honestly.
A current NSW Fair Trading contractor licence for the relevant category. A licenced plumber for any services work — tapware relocation, drainage, hot water. Public liability insurance. HBCF insurance for contracts over $20,000.
The contractor licence is publicly verifiable on the NSW Fair Trading website. Check it before you sign. In a strata context, the OC will typically require this documentation anyway — but that’s their protection, not yours. Verify it independently.