Local Knowledge - Croydon
Covering homes near Boxpark Croydon, the Fairfield Halls, and Lloyd Park.
Croydon's two halves: clay in the north, chalk hills in the south
Croydon sits on London Clay in the north and on chalk in the south, and the housing follows that split. Thornton Heath, Norbury, Selhurst, South Norwood and Addiscombe are mainly Victorian and Edwardian terraces. On the southern hills, Purley, Sanderstead, Coulsdon, Kenley and Shirley are dominated by generous interwar semis and detached houses. Central Croydon adds apartment blocks, many of them recent.
Terraces in the north often have suspended timber floors and small back additions on concrete. The larger houses to the south have longer supply pipes, bigger heating systems and, on the steeper roads, pipes that run under sloping gardens and retaining walls. The right search method changes with each.
Groundwater, the Caterham Bourne and misleading damp
Kenley and Purley have a particular issue. The Caterham Bourne is a chalk stream that only flows when groundwater is high, and in early 2014 it flooded homes and closed the Brighton Road and Godstone Road for weeks. Flood alerts for the area have been issued again since.
When groundwater is up, cellars and ground floors along the valley can become damp for reasons that have nothing to do with plumbing. Before any floor is lifted, we test whether water is being lost from the supply or heating. If the meter and heating pressure hold steady, the damp is probably coming from outside, and the report will say so.
Who supplies your water and who owns the pipe
Croydon is split between two water companies. Thames Water supplies much of the borough, while the SES Water area reaches into the south around South Croydon. The name on your bill tells you which applies. With either company, the pipe from the main to the boundary stop valve belongs to the water company and the supply pipe from the boundary into the house belongs to you.
Lead supply pipes remain in some pre-1970 homes, particularly the older terraces in Thornton Heath and South Norwood. Both companies supply hard water, so old valves scale up and stop taps may not shut completely, which can make a leak look smaller than it is. If your stop tap is stiff or will not close, tell us when you book so the engineer can plan the isolation tests around it.
Choosing the right method in Purley, Sanderstead or Thornton Heath
In a Thornton Heath terrace, heating leaks under boards and in the rear slab are usually found with thermal imaging, from £150. On a sloping Sanderstead or Coulsdon plot where the supply pipe crosses a lawn, steps or a drive, acoustic detection from £150 is the first choice, and tracer gas from £200 takes over if the pipe is plastic, deep or too quiet to hear.
In town centre flats, underfloor heating and pipes sealed in screed are common, and those surveys cost £300 to £700. When a leak is coming through into the flat below and cannot wait, emergency detection is £300 to £500. A combined survey using several methods is £250 to £500, and each job includes a written trace and access report.
Flats and converted houses across Croydon
Many Croydon homes are flats, whether in purpose built blocks near East and West Croydon or in Victorian houses divided up in Addiscombe, Selhurst and South Norwood. In a converted house, one floor's pipes often run through the ceiling or floor of another, and the original supply pipe may feed every flat in the building.
That makes access the first thing to arrange. If water is appearing in your ceiling, the source is usually in the flat above, so we need to get in there as well as into yours. Let the neighbour know as soon as you can. In purpose built blocks, the managing agent may hold keys to risers and plant rooms. When everyone knows the visit is happening, the survey can follow the water all the way to its source in one trip.
The written report then shows exactly where the leak is and which pipe it is on. That matters in a shared building, because it decides whether the repair falls to one flat owner, the freeholder or all the owners on a shared supply.
Guides for Croydon Homes
Leak Detection in Croydon: Common Questions
Is my water in Croydon supplied by Thames Water or SES Water?
It depends where you live. Thames Water supplies much of Croydon, and SES Water's area reaches into the south of the borough around South Croydon. Your water bill shows which company supplies you. Either way, leaks in the road go to the water company, and leaks on the supply pipe between your boundary and the house are the owner's responsibility.
My Purley cellar is wet. Is it a leak or groundwater?
It can be either. Parts of Purley and Kenley are affected by high groundwater when the Caterham Bourne is flowing. We check the water meter and heating pressure first, because a plumbing leak shows up as lost water. If both hold, the damp is probably from outside. If they do not, we trace the leak and mark it for repair.
Do you cover Purley, Sanderstead, Coulsdon and Kenley?
Yes. We cover the whole London Borough of Croydon, from Norbury, Thornton Heath and South Norwood in the north, through Addiscombe, Shirley and central Croydon, to Selsdon, Sanderstead, Purley, Kenley and Coulsdon in the south. The same equipment and published prices apply throughout. Call 020 3912 0200.
Can you find a leak on a supply pipe under a sloping garden?
Yes. Acoustic ground microphones follow the pipe and pick up the sound of escaping water, even under turf, steps or paving. On steep or deep runs, or with plastic pipe, we use tracer gas instead, since the gas rises to the surface at the leak. The engineer marks the spot so only a small section needs digging.
Trusted Leak Detection Serving Croydon
From emergency leak callouts to scheduled thermal imaging surveys, our South London team covers Croydon and the surrounding CR0–9, SE25 postcode area. We use non-invasive methods to find the leak source, with clear reports for insurance purposes.
Water Leak Detection
Hidden water leaks in Croydon found using thermal imaging and acoustic equipment. We locate the source without ripping up floors or walls, and provide insurance-ready reports for CR0–9, SE25 homeowners.
Learn more →Thermal Imaging Survey
Professional thermal imaging surveys in Croydon to detect hidden leaks, damp, and insulation defects. Our FLIR cameras reveal temperature anomalies invisible to the naked eye across CR0–9, SE25 properties.
Learn more →Acoustic Leak Detection
Advanced acoustic listening equipment to trace pressurised pipe leaks in Croydon. We pinpoint the exact location of the leak through walls, floors, and underground pipes across the CR0–9, SE25 area.
Learn more →Trace & Access
Full trace and access service in Croydon for insurance claims. We locate the leak, document the findings, and provide a detailed report that insurers require for CR0–9, SE25 properties.
Learn more →Central Heating Leak Detection
Losing boiler pressure in Croydon? Our engineers use thermal imaging and pressure testing to find hidden central heating leaks in CR0–9, SE25 homes without disrupting your system.
Learn more →Underfloor Heating Leak Detection
Specialist underfloor heating leak detection in Croydon using thermal cameras and pressure testing. We trace faults in wet underfloor systems across CR0–9, SE25 without lifting your floor.
Learn more →Water Mains Leak Detection
External water mains leak detection in Croydon using acoustic correlation and tracer gas. We locate underground supply pipe failures across CR0–9, SE25 accurately and non-invasively.
Learn more →Swimming Pool Leak Detection
Professional swimming pool and spa leak detection in Croydon. We use pressure testing, dye testing, and acoustic methods to locate leaks in pool shells, pipework, and fittings across CR0–9, SE25.
Learn more →Emergency Leak Detection
24/7 emergency leak detection in Croydon. When you have an active leak causing damage, our engineers respond fast with full detection equipment to find and stop the problem across CR0–9, SE25.
Learn more →Damp & Moisture Detection
Professional damp and moisture surveys in Croydon to determine whether dampness is caused by a leak, condensation, or rising damp. Detailed reports for CR0–9, SE25 property owners and insurers.
Learn more →Dependable Leak Detection Across Croydon
Our engineers are positioned across South London, which means we can get to Croydon quickly. We provide detailed trace and access reports laid out for insurance claims and use professional-grade detection equipment.
- Rapid response across Greater London
- Non-invasive methods protect your property
- We locate the leak on the first visit
- Non-invasive methods and written reports
- Honest pricing - the quote is the price
Neighbourhoods We Serve in Croydon
Our engineers cover every part of Croydon and the surrounding South London area. These are the areas we attend most often, and what tends to be different about each one.
Leak detection in Croydon
CR0Town centre flats and offices in the same towers, where out of hours access is usually the constraint rather than the detection.
Leak detection in South Norwood
SE25Victorian and inter-war terraces on sloping ground, so water from a leak travels downhill inside the structure before it shows.
Leak detection in Purley
CR8Detached and semi-detached houses on large plots, which means long private supply runs under drives and lawns.
Leak detection in Thornton Heath
CR7Dense terraced housing with a high rate of conversion, and frequently the original supply pipe still in the ground.
Leak detection in Addiscombe
CR0Edwardian family housing, commonly extended over the route the supply pipe takes into the property.
Leak detection in Coulsdon
CR5Inter-war housing on chalk, where an underground leak drains away instead of surfacing and the meter is the only early evidence.
Engineers covering all of Croydon
Call 020 3912 0200, day or night
Croydon Leak Emergency? Call Us Right Now.
Rising damp, unexplained water bills, wet patches on walls or floors. Whatever the symptom, we find the cause. One call connects you to a real leak detection specialist.
Finding Reliable Leak Detection in Croydon
If you're searching for leak detection near me in Croydon, you've found the right team. Our specialists are based across the CR0–9, SE25 postcode area and respond to callouts in Croydon and the surrounding South London neighbourhoods day or night, including weekends and bank holidays.
We handle everything from emergency leak detection near Croydon to scheduled thermal imaging surveys, trace and access reports, and central heating leak investigations. Every survey uses non-invasive technology, and all reports are insurance-ready. Our local presence in the CR0–9, SE25 area means we know the housing stock, the common leak issues, and the fastest routes to your door.
In Croydon, we regularly attend properties around Croydon Town Centre, South Norwood, and Purley. Whether you need emergency leak detection near me at 2am or want to book a thermal imaging survey in Croydon for later in the week, call 020 3912 0200 and we'll get it sorted.