Bathroom Renovations near you

The visible part of a bathroom renovation is short; the part that protects the house is buried. After demolition the licensed plumber sets the drainage falls and the rough-in, the carpenter squares and sheets the walls with suitable wet-area sheeting, and only then does the waterproofer prepare surfaces and apply the membrane in the sequence and cure times the membrane manufacturer specifies. Tiling over a membrane that has not properly cured is one of the cheapest mistakes to avoid and one of the most expensive to fix.

The NCC's housing provisions now contain the construction detail directly, with AS 3740:2021 available as the construction solution, and the ABCB warns that if you use that route you must use the correct version of the standard. In practice this means the membrane system, the primer, the bond breakers and the way junctions are treated all have to belong to one compatible system installed the way its manufacturer specifies, rather than assembled from whatever is on the truck.

For the fittings, two Australian schemes apply. WaterMark certification is mandatory for specified plumbing and drainage products, so a compliant tap, trap or floor waste carries the WaterMark and a licence number and can be checked in the ABCB's product database. The WELS label covers water efficiency instead: taps, showers and toilets must be registered and labelled before sale, and because a bathroom is where most household water is used, the star rating and the litres-per-minute or litres-per-flush figure on the label are worth comparing while you are still choosing.

Plumbing and drainage is licensed work in every state, and in New South Wales a licence is required no matter what the job costs. NSW plumbers submit a notice of work before starting and issue a certificate of compliance at completion, confirming the work meets the Plumbing Code of Australia and the relevant standards and identifying the responsible person. Queensland licenses plumbers and drainers through the QBCC, and requires a licence for plumbing and drainage regardless of the value of the work.

Waterproofing itself is a licensed trade class in Queensland, where the QBCC waterproofing licence covers applying, installing and repairing waterproofing and the associated surface preparation. Ask who will actually lay the membrane, what licence or certification they hold, and request the documentation for the system used. On approvals, a straightforward bathroom replacement that does not alter structure is usually minor work, but relocating a wall or changing a window brings the council or a registered certifier into the picture.

A failed wet area rarely stays inside the bathroom. Because the NCC requires floors of shower areas to be waterproof, including any hob or step-down, and requires wall and floor junctions to be waterproof, a break anywhere in that continuous system lets water into the frame, the floor structure and eventually the room or unit below. In a unit, that turns a private renovation into a dispute with the owners corporation and the neighbours, so check the by-laws and the approval requirements before demolition rather than after.

Age brings a second complication. Asbestos cement sheeting was widely used in Australian homes built before 1990, and bathrooms and laundries are among the places it turns up most. Have suspect material identified before it is disturbed. More than ten square metres of non-friable asbestos must be removed by a licensed asbestos removalist, any quantity of friable asbestos requires a Class A licensed removalist, and SafeWork NSW recommends using a licensed professional for any amount at all.

The NCC allows a bathroom or sanitary compartment to be ventilated by an exhaust fan or other mechanical ventilation rather than by an openable window, and where mechanical ventilation is used, the discharge of that air is governed by the code's condensation management provisions. A fan that merely pushes moist air into the roof space solves the fogged mirror and creates a different problem, so the duct route is worth confirming at the design stage. The NCC also sets a minimum ceiling height of 2.1 metres for bathrooms, showers, laundries and sanitary compartments.

After that, maintenance is simple and makes a real difference. Run the fan during and after showers, keep the flexible sealant at internal corners and the wall-to-floor junction intact and replace it when it perishes, keep the floor waste clear, and deal with a cracked tile or a persistent damp patch quickly rather than waiting to see whether it spreads. None of this substitutes for a correctly installed membrane, but it protects the one you have.

Where the value of the work is above your state's threshold, the contract must be in the prescribed written form and residential builders' insurance applies, with the certificate provided before you pay a deposit. Queensland's home warranty cover, which the contractor must take out before insurable work starts, is one example of the protection that exists precisely for defective or incomplete work.

Statutory warranties are implied into the contract by law as well, and in New South Wales they run for six years for major defects and two years for other defects whatever the contract says. The Australian Consumer Law adds guarantees of due care and skill and fitness for purpose that cannot be contracted out of. If a new bathroom leaks, raise it in writing promptly, keep photographs and dates, and escalate to your state building regulator or fair trading office if the builder will not return.