Can I replace a toilet myself in NSW (or anywhere in Australia)?
Short answer
No. Replacing a toilet suite — removing the old pan and cistern and connecting a new one to the water supply and sewer — is licensed plumbing work in NSW and every other Australian state. In Queensland and Western Australia you can replace specific cistern parts yourself, such as the float-valve washer, drop-valve washer or cistern washer.
Swapping a toilet looks like a bolt-it-down job, which is why it’s one of the most common DIY plumbing questions. A lot of the answers online come from overseas, where the rules are different. Here’s the Australian answer.
The rule in NSW
In NSW you need a licence “before you can do any plumbing, draining or gasfitting work… regardless of the cost”. The owner exemptions cover repairing a tap or showerhead, not replacing a toilet. Individuals doing unlicensed plumbing work face fines of up to $22,000.
The rule everywhere else
Replacing a whole toilet suite is licensed plumbing work in every state and territory. It involves the water connection to the cistern and the connection to the sewer or drain — both regulated work.
What you can fix inside the cistern
A running or slow-filling toilet is usually a worn washer or seal in the cistern. Some states let you replace those parts yourself:
| State | DIY-OK cistern repairs |
|---|---|
| Queensland | Drop-valve washer, float-valve washer, suction-cup rubber |
| Western Australia | Cistern washer |
| Other states | Treat cistern repairs as licensed work unless your regulator confirms otherwise |
Jobs around a toilet swap you can do
- Choose the suite: check the “set-out” (distance from the wall to the centre of the waste pipe) so the new pan actually fits your existing outlet. Measuring this before you buy avoids a costly return.
- Check the water rating: WaterMark certification and the WELS star rating are on the box.
- Prep the room: clear it, protect the floor, and plan any tiling or painting for after the plumber has finished.
- Remove old accessories like the toilet-roll holder or towel rail.
Signs it’s more than a washer
Water pooling around the base, a pan that rocks, a sewer smell or a crack in the pan or cistern all point to a problem with the seal or the fixture itself. That’s a plumber’s job — and worth doing quickly, since a leaking pan seal can damage the floor.
For taps, showerheads and the full state-by-state rules, see what you can legally DIY in Australia.
Sources
Every rule on this page is taken from these official sources. If a rule has changed, please tell us and we’ll fix it.
This guide is general information, not legal or professional advice. Rules differ between states, councils and individual properties, and they change. Confirm with your state regulator or council before starting work, and if in doubt, get a licensed tradesperson.