Leak detection in Sydney finds where water is escaping from pipes, showers, slabs and walls, without tearing up your home to guess. A licensed plumber uses listening, moisture and thermal tools to pinpoint the leak, then repairs it properly.
This page is for homeowners with a high water bill, a damp wall or a wet patch that will not dry. It covers the signs, the methods, the process and the pricing across Sydney.
Key points
- A rising water bill, a spinning meter with taps off, damp walls and mould are the main signs of a hidden leak.
- Pinpointing the leak first limits cutting and patching, which keeps repair costs and mess down.
- Repairing leaks in private water pipes is licensed work, and you should receive a Certificate of Compliance for plumbing repairs.
- Get an itemised written quote that separates detection from repair.
When you need leak detection in Sydney
Water seldom stays where it leaks, so the visible damp patch is often well away from the actual fault.
- Your water bill has climbed with no change in use. A steady leak runs day and night, so the cost builds quietly between readings.
- Your meter keeps moving with every tap and appliance off. That points to a leak somewhere past the meter; check that the toilets are not running first.
- You have damp walls, peeling paint, mould or a musty smell. Moisture in wall cavities often traces back to a shower, a pipe or a roof penetration; see the shower leaking behind wall guide.
- Floors are warm, wet or cracked in one spot. A leak under a slab can warm or soften the floor above, and the water leak under concrete slab guide explains the causes.
- Water pressure drops suddenly. A burst or failed joint reduces pressure at the taps; our burst pipe guide covers the first steps.
- Ceilings stain below a bathroom or laundry. Upstairs leaks travel along framing before they show, so the stain is rarely under the leak.
What’s included in water leak detection
| Job type | What we do | When it suits |
|---|---|---|
| Water leak detection | Isolate sections of pipe, test pressure and use listening gear to locate the leak | High bills, a moving meter or unexplained wet ground |
| Thermal and moisture checks | Scan walls and floors for temperature and moisture patterns | Damp walls, ceilings and floors with no visible source |
| Leaking shower repair | Test the shower, find the failed seal, pipe or waterproofing and repair it | Stains on the other side of a shower wall |
| Burst pipe repair | Make safe, isolate, cut out the failed section and replace it | Sudden flooding, hissing in walls or a pressure drop |
| Leaking tap repair | Replace washers, cartridges or the tap if required | A constant drip or a leak at the base of a tap |
| Leak repair after detection | Open up as little as possible, repair, test and tell you what needs making good | Once the leak is located and you approve the quote |
- Pipe repairs: the how to repair a leaky pipe guide explains what a plumber does on site.
- Noisy pipes: hammering after a tap closes can loosen joints; read about a water hammer arrestor.
- Appliances: see the leaking hot water system guide when the leak is near your tank.
How the leak detection in Sydney job works
- Do a quick meter check. Turn off every tap and appliance, then watch your water meter; if it still moves, tell us.
- Call or send the form. Describe the damp, the bill and where you see water.
- The plumber inspects. They check fixtures, test sections of pipe and use detection equipment to narrow the leak to a small area.
- You get a written quote. It covers the repair and any making-good, so you can approve the work before anything is opened.
- The licensed plumber repairs the leak. They replace the failed pipe, joint or fitting and pressure test the line.
- Sign-off. You receive a Certificate of Compliance confirming the work meets the Plumbing Code of Australia, which is also useful for insurance or strata.
What leak detection in Sydney costs
Detection time depends on how many pipes need testing and how hard they are to reach. These verified Sydney rates show how the bill is built.
| Cost item | Sydney range (incl GST) | Typical |
|---|---|---|
| Plumber call-out fee | AUD 69–170 | AUD 140 |
| Hourly rate, standard hours | AUD 92–230 | AUD 140 |
| Hourly rate, after hours | AUD 170–345 | AUD 255 |
| After-hours or emergency visit | AUD 290–805 | AUD 520 |
| Leaking tap repair | AUD 80–260 | AUD 170 |
| Tap replacement | AUD 150–500 | AUD 330 |
| Toilet repair | AUD 150–350 | AUD 250 |
| Hidden leak detection and pipe repair | Quoted per job after inspection | |
- Location: a leak under a slab or inside a wall takes longer than a leak in an accessible roof space.
- Pipe material: older galvanised, copper or poly pipes fail in different ways, so repair methods vary.
- Making good: patching tiles, plasterboard and paint is often a separate trade and a separate cost.
- Urgency: burst pipes outside business hours cost more than a weekday booking.
Leak detection for homes, units and commercial sites
| Property | Common hidden leaks | What differs |
|---|---|---|
| House on a slab | Pipes under concrete, outdoor taps, irrigation lines | Detection is the main job; repairs may need slab cutting |
| Two-storey home | Upstairs bathrooms, laundries, ceilings below | Water travels, so moisture mapping saves guesswork |
| Unit or strata | Leaks between levels and shared risers | Access, owners’ approvals and clear reports for insurers |
| Commercial site | Long pipe runs, plant rooms, amenities | Scheduled testing around trading hours |
- Taps: if the drip is at the swivel, see the mixer tap leaking from swivel base guide.
- Toilets: a running or weeping toilet wastes water, as the how to fix a leaking toilet guide explains.
- Older pipes: corroded galvanised pipes in older Sydney homes often leak at the joints first.
What to check before you book leak detection
Use this list when you compare leak detection in Sydney quotes.
- Licence: confirm the person repairing your pipes holds a NSW plumbing licence.
- Insurance: ask for proof of public liability cover.
- Written, itemised quote: detection, repair and making good should be listed separately.
- Clear report: ask for photos or a short report of what was found, which helps with insurance claims.
- Compliance paperwork: ask for a Certificate of Compliance after plumbing repairs.
- Minimal damage: ask how the plumber plans to limit cutting into walls and floors.
Leak detection FAQs
How do you find a hidden water leak?
A plumber first rules out visible leaks at taps and toilets, then isolates sections of pipe and tests pressure. Listening and moisture equipment narrows the leak to a small area, so only that spot needs opening up and repairing.
How much does leak detection cost in Sydney?
You pay a call-out fee of AUD 69–170, typically AUD 140, plus labour at AUD 92–230 an hour. Detection time varies, and repair costs are extra. Ask for itemised quotes so detection and repair appear as separate lines.
Do you do leaking shower repair?
Yes. We trace shower leaks to the waste, pipes, grout, seals or waterproofing and repair the cause. Shower replacement and membrane failures are licensed work and need the right paperwork, so book a licensed plumber rather than patching with silicone.
What should I do if a pipe bursts?
Turn off the water at the main stop tap, switch off power in wet areas if it is safe, and call a burst pipe plumber. Open taps to drain the line and move valuables away. The plumber will repair the pipe and test it.
Can I repair a leaking pipe myself?
No. Sydney Water says a licensed plumber is needed for repairing leaks in private water pipes. A homeowner can change a tap washer, but anything inside walls or under floors needs a licensed plumber.
Is there leak detection near me, and how much is leaking tap repair?
We cover leak detection across Sydney. A leaking tap repair typically costs AUD 170, with a range of AUD 80–260, and tap replacement typically AUD 330. Call us with your address and symptoms to arrange a visit.
Book leak detection in Sydney
If your water bill has jumped or you can see damp you cannot explain, we can locate the leak, quote the repair in writing and fix it. Book a licensed plumber and avoid more water damage.
