Whether you need leak detection for a hidden water leak, a boiler that keeps losing pressure, a water meter that keeps moving or spinning, an unexplained high water bill, damp with no obvious source or signs of a leak beneath a floor, our specialist leak investigation service across London is here to help. We investigate residential and commercial leaks, accurately identifying and locating the source before explaining our findings and, where appropriate, carrying out the necessary leak repair.
The Leak Hunter are leak detection specialists covering London, providing water leak detection, central heating leak detection, mains water leak detection, underground leak detection, concrete floor leak detection and, following emergency isolation, gas leak detection. These specialist services support our overall leak investigation process, allowing us to establish which system is responsible before pinpointing the source of the problem.
We also provide Trace & Access leak detection across London, using appropriate non-invasive leak detection methods to locate hidden leaks with minimal unnecessary damage or disruption. Where required, we can provide detailed leak detection reports with findings and supporting evidence for insurance and Trace & Access claims, before recommending or carrying out the appropriate repair.
Professional leak detection in London requires an experienced approach to investigating a wide variety of property types, building ages and plumbing systems. From Victorian terraces and Edwardian homes to converted apartments, modern developments and commercial premises, every investigation begins by identifying the system responsible before accurately locating the source of the leak.
London’s diverse property landscape presents unique challenges. Buildings are frequently extended, converted or altered over many decades, with concealed pipework running through walls, floors, ceilings, basements and communal service areas. Modern apartment developments often contain complex plumbing and heating systems, while older properties may conceal original pipework that has been modified several times throughout the building’s life. Every investigation is tailored to the individual property and the symptoms being experienced.
Our engineers investigate leaks throughout London, including internal plumbing systems, central heating systems, underground pipework, incoming mains water supplies and gas installations. By accurately identifying which system is responsible before repairs begin, we help minimise unnecessary disruption and ensure work is targeted at the actual source of the problem.
Every leak investigation begins with a symptom, but the cause is not always immediately obvious. Some leaks are clearly visible, while others remain concealed behind walls, beneath floors, within ceilings, underground or inside pipework that cannot be seen without specialist investigation.
In other cases, property owners already know which system is affected but need the precise source locating before repairs can begin. It’s also common for customers to contact us after another contractor has confirmed there’s a leak but has been unable to identify exactly where it’s coming from.
Our engineers investigate residential and commercial leak problems across London, establishing which system is responsible before accurately locating the source. By confirming the cause first, we can recommend the most appropriate repair while helping to avoid unnecessary disruption and costly guesswork.
What Are You Seeing?
Every leak starts with a symptom, but the same symptom can have several different causes. If you recognise one of the situations below, our professional leak investigation can establish exactly what is happening before any repair work begins.
A leak where the source is not yet clear
Water coming through a ceiling
Leaking shower or wet room
Boiler losing pressure
Damp patches or mould
Unexpectedly high water bills
Wet garden or driveway
Low water pressure
The sound of running water when taps are off
Signs of a leak beneath a concrete floor
How We Investigate Leaks
Every leak investigation begins with understanding the symptoms and assessing the affected areas of the property. Because water, gas and pressure can travel through buildings and pipe systems, the visible signs of a leak are not always located where the problem originates.
Our engineers carry out a structured investigation, using the most appropriate non-invasive methods to identify the system responsible and accurately locate the source before any repair work begins.
Every investigation is designed to:
Confirm whether a leak is present.
Identify the system responsible.
Accurately locate the source of the leak.
Recommend the most appropriate repair.
Minimise unnecessary disruption to your property.
By confirming the leak location first, repairs can be targeted at the actual fault rather than the symptoms it creates.
Not sure what’s causing the issue? Our engineers can review the symptoms and advise on the best next step.
Every leak investigation is different, so we select the most appropriate methods for the property, the symptoms and the system being investigated. Rather than relying on a single technique, we combine our experience with specialist equipment to accurately identify the source of the leak before recommending any repair work.
Depending on the investigation, this may include:
Acoustic leak detection
Tracer gas detection
Thermal imaging
Moisture mapping
Pressure testing
Camera inspection
Visual inspection and system testing
Using the right combination of methods allows us to locate leaks accurately while helping to avoid unnecessary damage to walls, floors, ceilings and external surfaces.
Why Choose The Leak Hunter in London
The Leak Hunter is a family run independent specialist leak investigation company providing fixed-price investigations, professional leak detection and repair services across London, Surrey, Sussex and Kent.
Family-Run Independent Leak Detection Specialists
Providing non-destructive leak detection and repair throughout London, Surrey, Sussex and Kent.
25+ Years’ Industry Experience
More than 25 years’ experience investigating and resolving leak problems.
12-Month Warranty on Repairs
Repairs carried out by The Leak Hunter are backed by a 12-month warranty.
Support Through to Resolution
We remain involved wherever appropriate, helping customers move from diagnosis through to repair and resolution. If additional specialist work is required, we’ll explain the findings, outline the available options and help you move forward with confidence.
Fixed-Price Investigations
Transparent investigation costs agreed in advance with no unexpected hourly charges.
Investigation & Repair Service
From investigation through to repair where appropriate, providing continuity throughout the process.
Trusted Professional Standards
WaterSafe Approved • Gas Safe Registered • CIPHE Member
Water, Heating & Gas Leak Specialists
Specialists in water leaks, hidden leaks, heating leaks, mains water leaks, underground leaks, concrete floor leaks and gas leak investigations following emergency isolation.
Directly Employed Engineers
Every leak investigation is carried out by The Leak Hunter using our own specialist equipment. We do not operate a nationwide contractor network or pass work to third-party engineers. When you book with us, the engineer attending your property is part of The Leak Hunter team.
Price based on a standard domestic system. Larger or more complex systems will be discussed with you in advance.
Insurance, Compliance & Professional Standards
All our work is carried out under comprehensive insurance cover and in accordance with recognised national safety and water system standards.
As Gas Safe registered engineers and a WaterSafe approved company, we are authorised to assess, isolate and repair domestic heating and water systems safely and compliantly.
Where required, structured trace and access documentation can be provided for insurers, clearly detailing the confirmed fault location, the diagnostic process undertaken and post-repair pressure verification.
Every investigation concludes with confirmed system integrity — not assumption.
Not sure what’s causing the issue? Send us a photo on WhatsApp and we’ll take a look first.
If you’re looking for a different type of leak investigation, browse our All Services page to explore our specialist leak detection services. If you’d like to check whether we cover another town or area, visit our Service Area Directory to browse all of the locations we serve.
Frequently Asked Questions
Do you provide leak detection throughout London?
Yes. We carry out professional leak investigations across London for homeowners, landlords, businesses and property managers, locating leaks accurately before recommending the most appropriate repair.
What types of leaks do you investigate?
We investigate a wide range of residential and commercial leak problems, including internal plumbing leaks, central heating leaks, underground leaks, incoming mains water supply leaks, concrete floor leaks and gas leaks. If you’re unsure what type of leak you’re dealing with, we’ll identify the system responsible as part of our investigation.
What if I don’t know where the leak is?
That’s exactly what our professional leak investigation is designed for. We assess the symptoms, establish which system is responsible and accurately locate the source before any repair work begins.
Can you repair the leak once you’ve found it?
Yes. Once we’ve identified the source of the leak, we’ll explain our findings, recommend the most appropriate repair and, where suitable, carry out the work ourselves.
Do you use non-invasive leak detection methods?
Yes. We use a range of specialist non-invasive methods, selecting the most appropriate approach for each investigation to help minimise unnecessary disruption to your property.
Do you provide reports for insurance claims?
Yes. If required, we can provide Trace & Access reports and supporting documentation suitable for many insurance claims, confirming the leak location and outlining our findings.
How long does a leak investigation take?
Every investigation is different, depending on the property, the systems involved and the complexity of the leak. Most investigations are completed within a few hours, although larger or more complex properties may require additional time.
Book Your Leak Investigation in London
If you suspect a leak or would like to arrange a professional investigation, contact our team today. We’ll confirm the most appropriate investigation for your property and provide a fixed-price quotation before attending.
London forms part of The Leak Hunter’s established service area. Our applicable fixed-price leak detection services are available throughout our standard coverage area, with no additional mileage or travel supplements based on distance from our base.
Ready to Book Leak Investigation in London?
We’ll identify the source accurately using non-invasive methods and confirm your fixed price before attending. No guesswork, no unnecessary disruption.
