Renovating a Bathroom in a Melbourne Apartment? Here's the Owners Corporation Approval You Actually Need in 2026

In a standalone house, your bathroom walls, floor and plumbing are entirely yours to deal with, subject to the usual council and building permit rules. In an apartment, a lot of what makes up your bathroom, the structural slab underneath the tiles, the waterproofing membrane, the stack pipes running down to the unit below you, often counts as common property even though it's inside your lot. That distinction matters enormously, because any work touching common property generally needs owners corporation approval before you lift a single tile.

Under Victoria's Owners Corporations Act, you're entitled to renovate the interior of your own apartment. But that right comes with conditions. If your renovation requires a building permit, or if it touches shared services like plumbing stacks, waterproofing, or structural elements, you need to notify your owners corporation first, and in most buildings you'll need committee approval before work starts. Your building's own rules set out exactly what triggers that approval, which is why the first call you should make isn't to a tiler, it's to your strata manager.

A well-run owners corporation won't block a sensible bathroom renovation, but it will want a proper submission before granting approval. Expect to provide a set of plans or a scope of works, details of the contractor's licence and insurance, the expected timeframe, and how you plan to manage noise, water shutoffs and debris removal through common areas like lifts and corridors. Many buildings also want confirmation that any work affecting the waterproofing membrane will be certified against AS 3740, the Australian Standard for waterproofing of wet areas, because a failed membrane in a third-floor bathroom becomes everyone's problem the moment it leaks into the ceiling below.

Don't start demolition before you have that approval in writing. If you jump the gun and the committee later has concerns, you can be required to undo the work or pay to restore the property, on top of whatever you've already spent on tiles and tapware. It's a slow process on paper, but it's far faster than the alternative: a VCAT dispute with your owners corporation halfway through a gutted bathroom.

Owners corporation approval is one hurdle. A building permit from a registered building surveyor is a separate one, and you may need both. Generally, if your renovation is cosmetic, new tiles, a new vanity, a new showerhead, without touching structural elements or moving plumbing, you can often avoid a full building permit. The moment you start reconfiguring the layout, moving a wall, enlarging a shower recess into a different footprint, or altering waterproofing and drainage falls, you're almost certainly into permit territory.

Victoria also has cost thresholds worth knowing. Once your renovation's contract value exceeds $10,000, the person doing the work needs to be registered with the Victorian Building Authority. Push past $16,000 and the project typically needs Domestic Building Insurance as well, which protects you if the builder can't finish the job or goes insolvent. These aren't arbitrary numbers, they're the point at which regulators decide the stakes are high enough to demand a paper trail, and for a mid-range ensuite renovation cost Melbourne owners are quoting in 2026, you'll usually clear both thresholds without trying. Review our Melbourne Bathroom Permit & Compliance Guide for comprehensive statutory guidance.

If there's one area where apartment bathroom renovations go wrong more than any other, it's waterproofing. A compliant membrane under AS 3740 has to extend up walls to a specified height, seal every penetration where pipes pass through the floor, and be tested before expert tiling begins. In a house, a failed membrane is annoying and expensive. In an apartment, it's a liability issue that can involve your owners corporation, your insurer, and the owner of the unit underneath you all at once.

Ask your builder or waterproofer for a compliance certificate once the membrane is installed, and keep it with your renovation paperwork. Some owners corporations will ask for this as a condition of approval; even if yours doesn't, you want that document on file if a leak ever surfaces two years down the track. It's a five-minute request that can save you months of argument over who's responsible for repairing a stained ceiling in the apartment below.

Beyond the paperwork, think practically about how your renovation affects neighbours. Water needs to be shut off to install new tapware or move pipework, and in a lot of older Melbourne apartment blocks that means isolating water for the whole riser, not just your unit. Good owners corporations require advance notice to residents, usually at least 48 hours, so nobody's caught without water mid-shower. Trades also typically can't start noisy demolition before a set hour, often 7am on weekdays and later on weekends, under the building's own by-laws.

Booking your renovation with these constraints in mind, rather than discovering them once your tiler turns up, keeps the whole project moving. It also makes your owners corporation far more receptive the next time you need something approved, which matters if this bathroom is the first of several projects on your list.

The renovations that go smoothly in Melbourne apartments tend to follow the same sequence: talk to your strata manager early, confirm whether a building permit is needed alongside owners corporation approval, lock in a licensed contractor who already understands AS 3740 waterproofing requirements, and get everything in writing before a single tile comes off the wall. Skip any of those steps and you're not just risking delays, you're risking a renovation that technically shouldn't have happened at all.

If you're planning a bathroom renovation in a Melbourne apartment this year, start with your building rules, not your Pinterest board. The design decisions are the fun part. The approval process is the part that actually determines whether your renovation finishes on schedule, or sits half done while your owners corporation and your builder argue about who signed off on what.