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.
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.
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CorrelatorsLocate first
Underground Leaks
Supply pipe and mains leaks located under gardens, driveways and concrete — one marked point, one small excavation.
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Pressure lossUFH loops
Heating & UFH Leaks
Boiler losing pressure? We trace central heating and underfloor heating leaks to centimetres before anything is opened.
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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.
Three steps. No surprises.
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.
Coverage across all 33 Greater London boroughs. Map data © Google.
Why Londoners call us
London Leak Detection 247 — what you can expect
No find, no fee
If our engineers can't locate the leak, you don't pay for the visit. We only charge for results.
Non-destructive by default
Acoustic, thermal imaging and tracer gas detection pinpoint the source before anything gets opened up.
Insurer-ready reporting
Every job gets a written report with cause, origin and evidence — built to the standard insurers ask for.
Guides
Know your leak
Technical Guides
Acoustic vs. Thermal vs. Tracer Gas: A Technical Guide to Leak Detection Methods
We compare the technical principles, precision, and ideal applications of acoustic, thermal imaging, and tracer gas leak detection for property professionals.
4 min readTechnical Guides
Are Smart Water Leak Detectors Worth the Investment? A Technical Analysis
An examination of smart water leak detection technology, assessing its sensor types, connectivity, and integration for landlords and commercial property protection.
4 min readTechnical Guides
Brown Stain on Ceiling: Leak or Damp? A Technical Analysis
A brown stain on a ceiling can indicate either a water leak or condensation damp. We explain the technical methods used to diagnose the source and severity precisely.
4 min readTechnical Guides
Burst Pipe Insurance Claims in the UK: A Technical Guide to Documentation & Detection
A technical guide detailing the precise leak detection and documentation processes landlords and commercial property managers must follow to substantiate a burst pipe insurance claim in the UK.
5 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.
What should I do if a shower or bathroom is leaking through the ceiling below?
Stop using that shower or bathroom immediately and turn off the water at the isolating valve or stopcock. A stained, bulging or dripping ceiling below a wet room usually means water is escaping from the shower tray seal, waste, or a supply pipe under the floor. Catch drips, move valuables clear, photograph the damage for your insurer, then book a detection visit — we trace whether it is the seal, the waste or a pressurised pipe before anyone opens the ceiling.
Can I ignore a small ceiling water leak, or is it serious?
Never ignore it. Even a small brown patch means water is already sitting in the ceiling void, and plasterboard that stays wet loses strength and can sag or collapse without much warning — sometimes within days if the leak is active, sometimes over weeks with a slow drip. Treat a spreading stain, a soft or bulging area, or drips as urgent. A stain that is dry and unchanged may be historic, but it still needs the source ruled out.
How can I tell if water is leaking slowly without me knowing?
The reliable checks are your water meter and boiler pressure. Turn off every tap and appliance, note the meter reading, wait an hour and check again — any movement means water is escaping. A combi boiler that keeps losing pressure, an unexplained rise in your bill, warm patches on the floor, a musty smell or faint running-water sound are the other classic signs of a slow hidden leak. Two or more together is a strong prompt to investigate.
Does home insurance cover finding and fixing a leak?
Most UK buildings policies cover sudden escape of water and include trace and access — the cost of locating a hidden leak and making good the floors or walls opened to reach it, with typical caps of £5,000 to £15,000. Gradual leaks, wear and poor maintenance are commonly excluded, and the repair of the failed pipe itself is often your responsibility. Our reports are written to distinguish a sudden failure from gradual wear, which is what keeps a claim payable.