How Much Does Leak Detection Cost in Sydney?

Leak detection in Sydney typically costs between $150 and $900, depending on how hard the leak is to find. A simple, accessible leak — under a sink or around a visible fitting — usually sits at the lower end, around $150 to $350. A hidden leak inside a wall, under a slab, or underground can run from $300 to $600, and complex jobs involving multi-storey homes, strata properties, or difficult access can reach $700 to $900 or more.

Those numbers only tell part of the story, though. What actually drives the price isn’t the leak itself — it’s how much specialised equipment and time it takes to find it without tearing your home apart. This guide breaks down exactly what determines the cost, what’s included in a professional quote, and how to avoid paying for detection twice.

Leak Type	Typical Cost Range	What’s Involved
Visible or easily accessible leak	$150 – $350	Basic inspection, no specialist equipment needed
Hidden leak (in-wall, under floor)	$300 – $600	Acoustic listening, thermal imaging, or moisture mapping
Underground or slab leak	$300 – $700	Ground microphones, pipe locators, leak noise correlators
Complex or multi-storey/strata leak	$600 – $900+	Extended time, multiple detection methods, shared services
Follow-up CCTV pipe inspection	$150 – $400	Camera inspection of the affected line, often bundled with detection

These figures reflect typical Sydney-wide averages. Always confirm a fixed, upfront price before work begins rather than relying on an hourly estimate alone.

What Determines the Cost of Leak Detection?

1. How Hard the Leak Is to Access

A leak under an exposed sink takes minutes to confirm. A leak inside a wall cavity, under floating floorboards, or beneath a concrete slab requires non-invasive equipment to locate without cutting into the structure. The more layers between the plumber and the leak, the more time and technology the job needs — and the higher the cost.

2. The Detection Method Required

Not every leak needs the same tools. Plumbers typically choose from:

• Acoustic listening devices — pick up the sound of water escaping through a pipe, effective for pressurised line leaks
• Thermal imaging cameras — detect temperature differences in walls or floors caused by escaping water
• Leak noise correlators and ground microphones — pinpoint underground leaks by comparing sound signals from two points along a pipe
• CCTV drain cameras — visually inspect the inside of a pipe for cracks, root intrusion, or damage
• Pressure testing — isolates sections of the plumbing system to narrow down where pressure is being lost

Jobs that need a combination of these methods cost more than a single-method inspection, simply because they take longer and involve more equipment.

3. Property Type and Size

A single-storey home with straightforward pipe runs is generally quicker and cheaper to assess than a two-storey house, a large property, or a strata unit with shared plumbing lines. Strata and commercial properties often cost more because leaks can originate in shared infrastructure, which takes longer to trace and may require coordination with a body corporate.

4. Time of Day and Urgency

Leak detection booked during standard business hours is generally more affordable than an urgent after-hours callout. If water is actively causing damage, an emergency response is worth the extra cost — but if the leak is slow and contained, booking a standard appointment can reduce the price.

5. What Happens After the Leak Is Found

The detection fee covers locating the leak, not repairing it. Once the source is confirmed, repair costs are quoted separately and depend on the pipe material, location, and extent of the damage. Ask for a fixed price on both stages before work starts, so there are no surprises once the leak is found.

Not sure if you have a hidden leak?

A rising water bill or a damp patch could mean a leak is already costing you. Get an accurate, fixed-price leak detection quote from JG Wilson Emergency Plumbers. Call 02 9622 4888 or get a fast, free quote.

Signs You Might Need Professional Leak Detection

You likely need a professional leak detection service if you notice:

• Your water bill has risen sharply with no change in usage
• Your water meter keeps moving when every tap and appliance is off
• A damp patch, stain, or musty smell appears on a wall, ceiling, or floor
• Water pressure has dropped without an obvious cause
• You can hear running water but can’t locate its source

If any of these sound familiar, a DIY check is a reasonable first step, but a professional inspection is the only reliable way to confirm and locate the source. Our guide on how to locate an underground water leak walks through the basic checks you can do yourself before calling a plumber.

Is Professional Leak Detection Worth the Cost?

In almost every case, yes — and the reasoning is straightforward. A hidden leak doesn’t stay small. Left undetected, it can:

• Waste thousands of litres of water, driving up your water bill month after month
• Cause structural damage to timber framing, flooring, or slab foundations
• Lead to mould growth, which can begin within 24 to 48 hours of sustained moisture
• Increase the eventual repair cost significantly compared to catching it early

Professional detection costs money upfront, but it replaces guesswork — and guesswork is what leads to unnecessary digging, cut walls, or repairs in the wrong location. Non-invasive detection technology finds the leak precisely, which keeps the repair itself smaller and cheaper.

How to Get an Accurate Leak Detection Quote

Ask these questions before booking:

• Is the quote fixed, or based on an hourly rate that could increase?
• Does the price include a written report of findings?
• Is there a call-out fee, and is it waived if you proceed with the job?
• What detection methods will be used for your specific situation?
• Is repair work quoted separately, and can it be scheduled the same day?

A transparent plumber will answer all of these clearly before starting. If a quote seems unusually low, check what it actually includes — some providers advertise a low starting price that only covers the most basic inspection method, with extra charges added once the job proves more complex.

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Get a fixed-price leak detection quote — no guesswork, no surprises.

JG Wilson Emergency Plumbers uses acoustic, thermal, and CCTV detection technology to find leaks fast, without unnecessary digging. Call now to get a free quote. Call 02 9622 4888 today or request your free quote online.

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Leak Detection vs DIY Checks: What’s the Difference?

Method	Can Confirm a Leak?	Can Locate the Exact Source?	Best For
Water meter test	Yes	NoConfirming a leak exists somewhere	Confirming a leak exists somewhere
Visual inspection	Sometimes	Only if visible	Obvious leaks under sinks or fittings
Listening for sounds	Sometimes	Rarely precise	Initial suspicion of a leak
Professional acoustic/thermal detection	Yes	Yes	Hidden, underground, or in-wall leaks
CCTV camera inspection	Yes	Yes, inside pipes	Drain and sewer line leaks

A water meter test is a useful first step and costs nothing. Turn off every tap and appliance, note the meter reading, then check again after 15 to 30 minutes. If it’s moved, you have a leak — but you’ll still need professional equipment to find exactly where it is without opening up walls or digging up the yard.

Why Choose JG Wilson Emergency Plumbers for Leak Detection

JG Wilson Emergency Plumbers has been serving Sydney homes and businesses since 1991, using acoustic listening equipment, thermal imaging, and CCTV camera inspection to locate leaks accurately with minimal disruption to your property. Every quote is fixed and provided upfront, so you know the full cost of detection — and any recommended repair — before work begins. The team is available 24/7 across all Sydney suburbs, with same-day appointments for non-emergency leak checks and rapid response for active leaks causing damage.

If you suspect a leak but aren’t sure where it’s coming from, our dedicated leak detection Sydney service page has more detail on the equipment and process we use. For water pipe damage once a leak is confirmed, see our water pipe repair service.

FAQs

How much does it cost to find a water leak in Sydney?

Most leak detection jobs in Sydney cost between $150 and $900, depending on how accessible the leak is. Simple, visible leaks sit at the lower end, while hidden, underground, or multi-storey leaks cost more due to the specialist equipment and time required.

Does leak detection cost include the repair?

No. Leak detection covers locating the source of the leak. Repair work is quoted separately once the leak has been found, since the cost depends on the pipe material, location, and extent of the damage.

How long does professional leak detection take?

Most residential leak detection appointments take one to three hours. Straightforward leaks can be confirmed within an hour, while complex or hard-to-access leaks may take longer.

Can I find a water leak myself without calling a plumber?

You can confirm a leak exists using a water meter test, but pinpointing its exact location — especially if it’s hidden behind a wall, under a floor, or underground — usually requires professional acoustic or thermal detection equipment.

Is leak detection covered by home insurance? 

Some home insurance policies cover water damage caused by a leak, and a few may contribute toward detection costs, but this varies by insurer and policy. Check your specific policy, and act quickly, since most insurers expect leaks to be addressed promptly once discovered