The installation price and the suite price are two separate decisions
Keep the two halves of the bill apart in your head and the quote makes sense. The installation labour, meaning removing the old suite, disposing of it, fitting the new pan and cistern, connecting water, sealing and testing, runs $350 to $750 as of 2026. The suite itself is your choice, and retail prices vary so widely between budget, mid-range and designer models that we quote the total only once you have picked one or asked us to supply a model we trust. Our honest guidance on suite selection: the middle of the market is where reliability, spare parts availability and price meet. The premium end mostly buys looks, and the bargain end often buys a cistern whose parts are unobtainable in five years.
What pushes the install toward the top of the range
| Situation | Effect on installation cost as of 2026 |
|---|---|
| Like-for-like swap, same set-out, same inlet position | Lower end of $350 to $750 |
| S-trap to P-trap change, or vice versa | Upper end of the range, connector work involved |
| Set-out mismatch needing an offset connector | Upper end of the range |
| Back-to-wall or concealed cistern conversion | Quoted on inspection, often beyond a standard swap |
| Old flange or pan collar damaged or corroded | Quoted on inspection once the old pan is lifted |
| Floor damage found under the old pan | Quoted on inspection, repair before reinstall |
The set-out, the distance from the wall to the centre of the waste outlet, is the measurement that decides whether your job is simple. Measure it before you shop, or send us a photo and the measurement and we will tell you which suites fit without adaptors.
Repair or replace: the honest threshold
A toilet repair runs $120 to $300 as of 2026, so a single failed valve in a reasonably modern cistern is nearly always worth repairing. Replacement earns its keep in three situations: the cistern is discontinued and parts are gone, the suite is an old single-flush unit wasting water every day, or the pan is cracked, and a cracked pan is not repairable in any way we would put our name to. In our experience the tipping point comes around the second repair visit to the same ageing suite. If you are paying $120 to $300 more than once on a cistern from the 1990s, that money was most of the way to a new suite installed.
The water savings are real, and worth counting
Old single-flush toilets use up to 11 or 12 litres per flush. A modern WELS 4 star dual-flush suite averages around 3.5 litres. For a family household that difference compounds into tens of thousands of litres a year, which is why toilet replacement is one of the few plumbing jobs that partly pays for itself on a metered Gold Coast water bill. When you are comparing suites, the WELS star label is on every box, and moving from 3 star to 4 star costs little at purchase time while saving water every day the toilet is in service. We fit the suite you choose either way, but if saving water is part of your reason for replacing, do not buy the cheapest single-outlet model on the shelf.
Why toilet replacement is licensed work in Queensland
Swapping a toilet involves disconnecting and reconnecting the water supply and sealing a fixture into the sanitary drainage system, which sits inside the definition of plumbing work under the Plumbing and Drainage Act 2018. It must be done by a licensed plumber. That is not gatekeeping for its own sake: the two failure points of a DIY toilet install, the pan collar seal and the cistern inlet connection, both fail slowly and invisibly. A weeping pan seal soaks the subfloor for months before you smell it, and a poorly fitted flexi hose on the inlet is one of the most common causes of internal flooding we attend. The install price includes doing those two connections properly, and being accountable for them.
Picked a suite, or want us to supply one we would put in our own home? Call Hills Plumbing & Gas on 0472 657 042 for a fixed installation price, or book through our leaking taps and toilets service page. QBCC licence 15243081.
Sources: Plumbing and Drainage Act 2018 (Qld); QBCC plumbing licensing; WELS scheme flush volume ratings. Check current requirements before arranging work.