Hidden water leak: find it, fix it, claim the rebate

A hidden leak costs three ways: the water on the bill, the plumber who finds it, and the damage it does. The first is partly refundable from almost every water utility — on conditions.

Read from primary sources · Editor-reviewed · Current as at 20 September 2026

By the waterdamagequotesau.com editorial team · Published 20 September 2026 · Last reviewed 20 September 2026 · 8 min read

14 primary sources cited on this page. How we check what is on this site

A hidden leak costs money three ways: the water on the bill, the plumber who finds it, and the damage it does while nobody knows. The first is partly refundable — almost every Australian water utility publishes a leak allowance for concealed leaks — but only if you find it, fix it within the deadline and keep the plumber’s paperwork.

Leak allowances by water utility

Each utility’s published allowance for a concealed leak on the customer’s side, fixed by a licensed plumber. Read 5 October 2026; Barwon Water not read.
Utility	What is refunded	Repair	Apply	How often
Sydney Water	50% of the water usage charge for the most impacted quarter	by a licensed plumber or qualified technician	within a year of the repair	one allowance every 5 years
Victorian water corporations (South East Water, Greater Western Water, Yarra Valley Water)	50% of the estimated water lost, capped at $2,000	within two weeks	within 90 days of the notice or the bill's due date	one rebate every five years
Urban Utilities	70% of state bulk water charges and 100% of tiered charges (owner-occupied)	within one month	within six months	not within 3 years of a previous one
Water Corporation	up to 50% of the estimated water lost	within 60 days	within 6 months of the repair	not stated
SA Water	50% of lost water	within four weeks	within six weeks of the repair or the next bill	once every five years
Icon Water	the increase on the previous year, up to $2,500	by a licensed plumber	not confirmed	one-off
Hunter Water	up to 50% of the increase in usage	by a licensed plumber	within 30 days of the bill's due date	not within the last five years
City of Gold Coast	100% of council charges and 70% of state bulk water charges	within one month	within three months of the rate notice	not within the past three years

Three rules run through every row. The leak has to be one you could not reasonably have seen or heard. It has to be fixed promptly by a licensed plumber, whose invoice or report says what was found and where. And no utility pays for the detection itself: Yarra Valley Water says you’ll be responsible for any costs, including repairs (Yarra Valley Water, How to check for leaks). Keep a photo of the meter before and after the repair; several utilities ask for it.

Finding it: the meter test

South East Water, Leaks · read 5 October 2026

With all taps and appliances off: if the numbers on the meter have changed or the wheel has moved, you may have a leak. Water Corporation suggests 15 minutes on the red numbers, Sydney Water at least an hour, and Greater Western Water four to five hours.

The test only says that water is going somewhere. Before paying anyone to find it, check the obvious things first — cisterns running into the pan, dripping taps, the hot water relief valve — because those are not hidden leaks and most allowances exclude them.

Get the water damage dried

Four digits, and restoration companies advertising for your postcode call you back. A plumber finds the leak; drying is separate.

Professional leak detection

Published Australian leak detection price, hipages. Indicative.
Line item	Published rate	Basis	Published by
Leak detection	$168 to $400	per job	hipages

Leak detection services may use acoustic listening, tracer gas, pressure testing and thermal imaging to locate a leak under a slab, in a wall or underground without digging up everything. The report they give you is the document a leak allowance application usually needs: Icon Water, for example, asks for how the leak was detected, where it was and where the water was going. Ask for that in writing before you pay.

When the leak has already done damage

A leak inside a wall or under a floor that has run for weeks has usually wet more than the pipe. The water damage can be a listed event as an escape of liquid (Insurance Contracts Regulations 2017 (Cth) reg 19(1)(a)(vi)); the failed pipe, and the argument about how long it ran, is where Insurance Contracts Regulations 2017 (Cth) reg 19(2)(b) comes in. Moisture readings around the leak point show how far it spread. On the published rate card, drying one room over the three-day minimum is $1,260 excluding GST. Musty smell covers finding leaks by their other symptom, and plumbing cover whose pipe it is.

Leak detection by city

Sydney, Melbourne, Brisbane, Perth and the Gold Coast have their own pages, setting the local utility’s allowance and boundaries side by side. For the others, the table above and the city pages cover the utility’s rules.

Common questions

How do I check for a hidden water leak?

Turn off every tap and appliance, read the water meter, use no water for a while, then read it again. South East Water suggests 20 minutes, Water Corporation 15, Sydney Water at least an hour and Greater Western Water four to five hours. If the meter moved, you may have a leak.

How much does leak detection cost in Australia?

hipages publishes leak detection at $168 to $400, based on national averages and described as indicative. Utilities do not pay for detection on your side of the meter: Yarra Valley Water says you will be responsible for any costs, including repairs.

Will my water utility refund a high bill caused by a leak?

Most publish a leak allowance for concealed leaks fixed by a licensed plumber. Sydney Water, Water Corporation, SA Water, Hunter Water and the Victorian corporations refund about 50% of the water lost or the increase; Urban Utilities and the City of Gold Coast pay 70% to 100% of some charges; Icon Water caps its adjustment at $2,500.

What counts as a hidden leak?

One you could not see or hear. Sydney Water excludes leaks shown by damp soil or wet grass and leaks on taps, cisterns, dishwashers and washing machines; Hunter Water rejects applications where there was dampness on surfaces or unusual grass growth.

How long do I have to fix the leak?

It varies: two weeks under the Victorian guideline, four weeks for SA Water, one month for Urban Utilities and the City of Gold Coast, 60 days for Water Corporation.

Does insurance cover damage from a hidden leak?

The water damage from an escape of liquid can be a listed event; the failed pipe and a leak that ran unnoticed for a long time are where wear and tear and gradual damage arguments arise.

Sources cited on this page

Every figure above was read from the source it is attributed to on 20 September 2026. How we check this.