No find no feeNon-invasive
Leak Detection
Hidden leaks pinpointed without opening floors or walls — acoustic, thermal and tracer gas methods, no find no fee.
Learn moreNo find, no fee leak detection
We Find the Leaks London Can’t See
Hidden water leaks located to centimetres with acoustic, thermal and tracer gas technology — then repaired by real plumbers. Across all 33 London boroughs.
33Boroughs covered
No feeIf we don’t find it
Same dayAppointments
48hInsurer reports
PinpointedNot guessed. Not dug up.
33
London boroughs covered
Same-day and next-day appointments
4
Methods on every visit
Acoustic, thermal, tracer gas, moisture
No find
no fee
You only pay if we locate the leak
48hr
Insurer-ready reports
Trace & access for your claim
Leak detection specialists
Every hidden leak has a location
Our job is to find it before the damage spreads — and without turning your home into a building site to do it.
InfraredZero disruption
Thermal Imaging Surveys
Infrared cameras reveal wet floors, warm heating runs and moisture spread in minutes — with image evidence included.
Learn more
CorrelatorsLocate first
Underground Leaks
Supply pipe and mains leaks located under gardens, driveways and concrete — one marked point, one small excavation.
Learn more
Pressure lossUFH loops
Heating & UFH Leaks
Boiler losing pressure? We trace central heating and underfloor heating leaks to centimetres before anything is opened.
Learn more
All 33 boroughsClear pricing
Emergency Plumbing
Bursts, failed stop taps, blocked toilets and active leaks — urgent response with pricing agreed before we travel.
Learn moreInsurance48h reports
Trace & Access Reports
Insurer-ready documentation of cause, origin and damage — the evidence your escape-of-water claim depends on.
Learn moreFour ways to find one leak
The right method for every pipe
Acoustic
Ground microphones and correlators follow the sound of escaping water through floors, walls and soil.
Thermal
Infrared cameras map temperature anomalies — hot pipe runs, cold evaporation patches, spreading moisture.
Tracer gas
A safe hydrogen mix escapes through the same hole the water does, and rises straight to our detector.
Moisture mapping
Calibrated meters profile how far water has actually travelled — the evidence layer behind every report.
Booking to fixed
Three steps. No surprises.
01
Describe the symptoms
Damp patch, dropping boiler pressure, spinning meter, unexplained bill — the pattern tells us where to start.
02
Fixed fee, agreed first
You know the detection fee and the arrival window before you book. No find, no fee stands on every visit.
03
Pinpointed, then fixed
We locate the leak to centimetres, repair it on the day where possible, and document everything for your insurer.
Everything we do
Service directory
Core services
Leak Detection
Reports & blocks
Insurance & Commercial
Local everywhere
All 33 London boroughs
Victorian terraces, mansion blocks, new-build towers — every borough leaks differently, and we know the patterns.
Leak Detection Barking and DagenhamLeak Detection BarnetLeak Detection BexleyLeak Detection BrentLeak Detection BromleyLeak Detection CamdenLeak Detection City of LondonLeak Detection CroydonLeak Detection EalingLeak Detection EnfieldLeak Detection GreenwichLeak Detection HackneyLeak Detection Hammersmith and FulhamLeak Detection HaringeyLeak Detection HarrowLeak Detection HaveringLeak Detection HillingdonLeak Detection HounslowLeak Detection IslingtonLeak Detection Kensington and ChelseaLeak Detection Kingston upon ThamesLeak Detection LambethLeak Detection LewishamLeak Detection MertonLeak Detection NewhamLeak Detection RedbridgeLeak Detection Richmond upon ThamesLeak Detection SouthwarkLeak Detection SuttonLeak Detection Tower HamletsLeak Detection Waltham ForestLeak Detection WandsworthLeak Detection Westminster
Across Greater London
One call, all of London
From inner-city mansion blocks to outer-borough semis — acoustic, thermal and tracer-gas leak detection, and emergency plumbing, wherever you are.
Map data © OpenStreetMap contributors.
What London says
Rated by real homeowners
Google Reviews
London Leak Specialist
4.9
★★★★★
Based on 127 reviews
Sarah Whitfield
Local Guide · 24 reviews
★★★★★a week ago
Boiler kept losing pressure and two plumbers couldn't find why. These guys traced it to a pinhole leak under the kitchen screed with thermal imaging in under an hour. No find no fee meant no gamble. Proper written report for my insurer too.
James Okoro
8 reviews
★★★★★two weeks ago
Damp patch spreading across the ceiling in our Islington flat. The engineer used acoustic gear and tracer gas, pinpointed the leak in the upstairs bathroom waste, and didn't rip up half the floor to do it. Clear fixed price up front.
Priya Sharma
Local Guide · 41 reviews
★★★★★three weeks ago
Water meter was spinning with everything off. They found an underground supply pipe leak in the driveway without digging the whole thing up. Honest about cost and the report was exactly what Thames Water asked for.
Daniel Cole
3 reviews
★★★★★a month ago
Called on a Sunday with water coming through a light fitting. Someone answered, an engineer arrived within the window they promised, isolated it and made it safe the same day. Can't fault the response.
Amelia Foster
Local Guide · 17 reviews
★★★★★a month ago
Underfloor heating had lost pressure for months. They mapped the loop and found the leak spot on, saving us from lifting the whole floor. Tidy, punctual and explained everything without the usual scare tactics.
Tom Bennett
11 reviews
★★★★★a month ago
Insurance wanted a trace and access report before they'd pay out. The report they produced — cause, origin, moisture readings, photos — got the claim approved with no back and forth. Worth every penny.
Guides
Know your leak
Leak Detection
How to Find a Water Leak Under the Floor (Before Ripping It Up)
Warm patches, lifting boards, a meter that never stops — here is how to confirm a leak under your floor and locate it without demolition.
7 min readLeak Detection
Water Bill Suddenly High? How to Tell If You Have a Hidden Leak
A jump of 20% or more in metered water use, with no change in household habits, deserves investigation. Here is the checklist.
6 min readHeating
Boiler Losing Pressure? The Real Causes (And When It Means a Hidden Leak)
Topping up the boiler every few days is not maintenance — it is a symptom. Here is how to diagnose the real cause.
7 min readLeak Detection
Damp Patch on the Ceiling: What to Do First (And What Not to Do)
The stain is rarely under the leak. Here is how to read a ceiling patch, make it safe, and find the true source.
6 min readBefore you book
Honest answers first
How much does leak detection cost in London?
A standard domestic detection visit is a fixed fee agreed when you book, covered by no find, no fee. Most visits take two to four hours and include acoustic, thermal and moisture testing, with tracer gas added for stubborn leaks. Repairs are quoted separately before any work starts — see our pricing page for current figures.
Do you really not charge if you can’t find the leak?
Correct. If we attend a confirmed live leak and fail to locate it, the detection fee is waived. It keeps the incentive honest: we get paid for finding leaks, not for visiting.
Can you fix the leak on the same visit?
Usually. Our detection engineers are qualified plumbers carrying pipe and fittings, so straightforward repairs happen on the day. Larger repairs — buried mains, underfloor heating loops — are quoted precisely once the leak is marked.
Will my insurance pay for this?
Most buildings policies include trace and access cover, which pays for locating a hidden leak and making good the access. Our reports are structured for UK insurers and routinely accepted without a follow-up visit.
Which areas do you cover?
All 33 London boroughs, from Barking and Dagenham to Westminster. Same-day appointments are usually available in inner London, and next-day almost everywhere else.