Worried about a hidden water leak in your home? You'll want a leak detection specialist to investigate before it causes more damage.

Find out how much water leak detection costs in the UK, and what's involved to help get to the bottom of the issue.

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How much does water leak detection cost? (UK)

Standard leak detection can cost anywhere between £80 – £1,600, depending on the techniques required.

Why such a difference in price? It all depends on:

• How large the leak is

• Which water leak detection service you choose

Let's look at four of the most common leak detection methods to help you get a clearer picture.

Common leak detection methods & costs

Below are four of the most common methods used to locate water leaks with precision.

And the good news is, they are all non-invasive. Meaning there's no need for digging or removing flooring:

1. Infrared camera water leak detection cost

• Method: Uses thermal imaging to spot temperature differences caused by hidden moisture

• Best for: Detecting leaks behind walls, ceilings and floors

• Cost: Infrared camera water leak detection costs between £150 – £1,000

2. Acoustic device leak detection cost

• Method: Uses listening devices to detect the sound of escaping water

• Best for: Underground or hidden pipe leaks, and central heating leak detection

• Cost: Acoustic device leak detection costs between £1,000 – £1,500

3. Tracer gas leak detection cost

• Method: Uses safe, non-toxic gas pumped through pipework to locate leaks. Gas then escapes through tiny cracks that may be difficult to detect otherwise

• Best for: Underfloor heating or hard-to-find leaks

• Cost: Tracer gas leak detection costs between £250 – £2,000

4. Water dye for leak detection cost

• Method: Uses highly concentrated, toxic-free water dye to detect leakage

• Best for: Fixed pipework, ceilings, bathrooms, flat roofs, drains, toilets, and swimming pools

• Cost: Professional-grade water dye methods vary in price, so you're best off contacting a specialist for an exact quote

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Find leak detection specialists we've checked and approved in your area using our free mobile app below, and get it sorted.

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What's included in a leak detection cost?

Always check with your chosen plumber or leak detection specialist exactly what’s included in your quote. Most will provide an itemised breakdown, so you know what you’re paying for.

A quote will usually include:

• Labour costs – Hourly or daily rate, plus any call-out fee

• VAT – If the tradesperson is VAT-registered (always check if it’s included)

Hidden or additional costs to watch out for

It's one job to find a leak in your home, but it's another thing to then repair it. Consider these additional costs:

• Repairing your property’s main water service line – Can cost between £330 – £1,500

• Repairing a leaking internal pipe – Is around £330

• Making good again – If flooring has to be removed, or holes are made in walls during the detection process, you'll need to cover the cost of the repair work

Don't forget, emergency call-out or out-of-hours labour costs will usually be higher.

Our cost guide to fixing a leaking water pipe has more information

Signs you might have a water leak

Some water leaks are obvious, such as puddles of water around the toilet and sinks. However, others can stay hidden for weeks or even months.

Spotting the warning signs early can help prevent costly damage to your home.

Look out for:

• Damp patches on walls, ceilings or floors

• Mould, mildew or musty smells

• Peeling paint or bubbling wallpaper

• Unexpectedly high water bills

• Reduced water pressure

• Dripping sounds when no water is running

• Slow-heating radiators or boiler pressure drops

• Patches of unusually green or soggy grass in the garden

You can also help identify a hidden leak by:

• Checking cupboards beneath kitchen and bathroom sinks

• Looking underneath toilets, showers, dishwashers and washing machines for signs of moisture

• Watching your water meter when no water is being used in the home

Spot a few of these signs, and you're best off contacting a water leak specialist to take a look.

Why use Checkatrade to find leak detection services near you?

• Checked - Every Checkatrade member must pass up to 12 checks and commit to upholding the Checkatrade Standard

• Reviewed - Over 6.2 million reviews have been published on Checkatrade on everything from communication, tidiness, timekeeping, and quality of work

• Guaranteed - Jobs booked through Checkatrade are covered up to £1,000 (T&Cs apply)

Water leak detection: Cost checklist

• Shop around for fair and competitive plumbing quotes

• Always hire a leak detection specialist with experience and top-rated reviews

• Make sure to ask exactly what’s included in the quote – for instance, emergency call-out fees

• Check whether the quote includes repairs after the leak has been located

• Ask if there are additional charges for access work, such as floor lifting (if needed)

• See whether your home insurance covers leak detection, trace and access costs

• Don't put off sorting a hidden leak. It could be causing substantial damage beneath floorboards and walls

Water leaks can cause noticeable damage in and around your home. Whether you need a flooring contractor, a plasterer, or painter and decorator, at Checkatrade, we've got you covered.

FAQs

How much does it cost to detect a water leak?

Standard leak detection can cost anywhere between £80 – £1,600, depending on the techniques required.

Can plumbers detect hidden water leaks?

Both qualified plumbers and specialist leak detection engineers can locate hidden leaks using non-invasive equipment designed to minimise damage to your property.

How are water leaks detected?

A plumber can detect and fix a water leak efficiently using specialist equipment, including infrared cameras and sound monitoring devices. These tools are designed to be non-invasive, meaning you don't need to worry about floors being pulled up or holes in walls.

Is leak detection covered by home insurance?

Some home insurance policies may cover the cost of tracing and accessing a water leak, but coverage varies between providers. Always check your policy documents or contact your insurer directly.

What are the signs of a hidden water leak?

Common signs include damp patches, mould growth, low water pressure, unexplained increases in your water bill and the sound of running water when no taps are on.

How do you find a water leak in your house?

Here are some ways you can find a water leak in your house:

• Monitoring your water usage frequently

• Spotting a decrease in water pressure when you’re having a shower or filling up the bath

• Noticing when your water heater or boiler switches on

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