Gas Safe registered · 24/7 North, Inner & East London

Water leak detection in London

Damp patches, a rising water bill, a boiler losing pressure or the sound of running water? We pinpoint hidden leaks without ripping up your home, using thermal imaging and acoustic tracing, then fix them.

We trace it, access it and fix it. Reports provided for insurance claims.
Trustpilot 4.6 336 reviews Google 4.8 Google reviews
Mayfair Plumbers branded van in London
600+ 5-star reviewsGoogle & Trustpilot
Insurance reportsFor trace & access claims
Gas Safe Registered Safe Contractor approved GoogleGoogle 4.8Google reviews 1-hour responserarely more than an hour away

We find the leak. We don't rip up your home to do it.

Using thermal imaging and acoustic tracing, we pinpoint the exact spot before we lift a single tile, so there's no digging and guessing. Once we've found it, we access it and fix it, and provide a report for your insurer if you need one.

Think you've got a leak?

The signs of a hidden water leak

Hidden leaks rarely fix themselves and only get more expensive. Here's what to look for, and where they usually hide.

Damp patches or mould

Staining, bubbling paint, a musty smell or mould on walls, ceilings or floors with no obvious source.

Unexplained high water bill

A bill that's crept up with no change in use is one of the clearest signs of water escaping somewhere.

Boiler losing pressure

If your boiler needs topping up regularly, there's often a small leak somewhere in the heating pipework.

Sound of running water

The trickle or hiss of water when nothing's turned on usually means a pipe is leaking out of sight.

Under floors and screed

Leaks in pipework buried under floors or in the screed, common with underfloor heating, and hard to find without the right kit.

Behind walls

Concealed pipes running through walls can leak for weeks before the damp shows, we trace them without tearing the wall apart.

Central heating pipework

A pinhole leak on a heating pipe drops your boiler pressure and wastes water. We find the exact spot and repair it.

Bathrooms and wet rooms

Failed seals, waste pipes and shower trays are a frequent culprit, especially when it's the flat below noticing it.

Rated by London homeowners

Real reviews from local leak jobs

Trustpilot 4.6 · Google 4.8 · 1,000+ jobs across London

4.6based on 336 Trustpilot reviews
★★★★★

"Ricky has done an amazing job with the boiler and the leaking water pipes. He traced the leak quickly and resolved the issue professionally and efficiently. I couldn't be happier with the service."

Monika NadolnyTrustpilot
★★★★★

"Lovely person called to book the appointment, the engineer was here in under 3 hours. Respectful, clean and explained the process as he went along. Found and fixed the leak quickly."

Annette-Marie SmithTrustpilot
★★★★★

"They called me straight away, we organised a visit within 2 hours, which was actually closer to an hour. The engineer Dan traced the leak without any mess and sorted it efficiently. Massive thumbs up all round."

Tom HolmesTrustpilot
★★★★★

"Clear about their terms and prices from the outset. The engineer arrived when he said he would, found the leak and carried out the work quickly and without leaving a mess."

Christian SheldonTrustpilot
★★★★★

"June was very professional and polite at all times, and turned up on time when expected. Area left clean and all working. Will definitely use again."

David DavisonTrustpilot

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Why Mayfair Plumbers

The safe way to find your leak

What matters when you've got a hidden leakMayfair PlumbersTypical market experience
Non-invasive tracing (thermal & acoustic)Dig and guess
Insurance report provided (trace & access)Rarely
No call-out fee£70–£150
Rarely more than an hour awayNext day
Fixed price agreed before work startsQuoted after
We fix the leak once we've found itFind only
Real engineers, real jobs

Genuine local work

Non-invasive leak detection for homes, flats and landlords across London, with reports for insurance claims.

Your questions

Leak detection FAQs

How fast can you come out?
We're rarely more than an hour away across North, Inner & East London, and we offer same-day visits. Call us and we'll give you a realistic arrival time and talk you through what to check, or turn off, while you wait.
How much does leak detection cost?
It depends on the property and how well hidden the leak is, but you always get a fixed price upfront before we start, with no call-out fee and no added ULEZ fees. If it's a trace & access job on your insurance, we'll explain how that works too.
Can you find the leak without damaging my home?
Yes, that's the point of proper leak detection. We use thermal imaging, acoustic tracing and moisture readings to pinpoint the exact spot before any floor or wall is opened up, so we're not digging and guessing. Any access is kept as small and tidy as possible.
Do you provide a report for my insurer?
Yes. Many home insurance policies cover "trace and access", the cost of finding and getting to the leak. We provide the report and detail you need to support a claim, and can talk you through the process.
Do you fix the leak too, or just find it?
Both. We're plumbers first, so once we've traced the leak we can access and repair it there and then in most cases, rather than leaving you to find someone else to do the actual fix.
Do you cover my area?
We cover North, Inner & East London, including Camden, Islington, Hackney, Hampstead, Kensington & Chelsea, Stratford, East Ham and the surrounding boroughs. Not sure if we reach you? Just call and we'll tell you straight away.
Where we work

Covering North, Inner & East London

Leak detection engineers across the boroughs, with same-day call-outs. Not sure if we cover you? Just call.

Got a water leak you can't find?

Don't let it get worse. Call and we'll trace it today.

Call 020 3633 1526 Request a fast callback
020 3633 1526On call 24/7 across London
Call now