Plumbing · Shepherd's Bush, London
Leak Detection & Repair in Shepherd's Bush, London
A hidden leak is the one plumbing fault where the cheapest decision is to find it before you open anything. [The Honest Plumber Shepherds Bush](/) answers on 07886 073115 at any hour and arranges leak tracing through independently owned partner companies, who locate the fault first and quote the repair in writing, rather than cutting holes in your plaster and hoping.
Telling a leak from condensation is half the job. A stain that grows after rain points to the roof or a gutter, one that grows when the heating is on points to a radiator or heating pipe, and one that is wet whenever anyone uses the bathroom upstairs points to a waste or shower tray. We ask those questions before we book a survey, because the answer sometimes saves you one.
Published UK figures put a hidden-leak survey at £150 to £750, with thermal imaging at £150 to £500 and opening up a wall or ceiling to reach the pipe at £150 to £1,000 or more. A repaired pipe comes in at £100 to £500 and a leaking stopcock replacement at £150 to £300 in London. Those are ranges from other firms, not our quotes, and your written figure comes from the partner company.
In Shepherd's Bush the stock makes leaks awkward. Late-Victorian terraces cut into flats mean a drip in one ceiling may start in a neighbour's bath, and old lead or early copper supply pipes run under floorboards that were never meant to be lifted twice. We will tell you honestly if the leak is the freeholder's to fix.
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Services
Leaks We Trace and Repair
Where the water shows up is rarely where the fault is.
Hidden Supply Leaks Under Floors
A water meter that creeps while every tap is off, or a damp patch on a ground-floor skirting, points to a supply leak buried under boards or screed. The partner company isolates sections of pipe, listens, uses thermal imaging where it helps and marks the likely spot before anything is lifted. The repair is quoted separately.
Ceiling Stains from Bathrooms and Kitchens
In converted terraces on Askew Road and Uxbridge Road, a stained ceiling usually traces to the flat above: a worn bath seal, a shower tray, a weeping waste or a washing-machine hose. We say whose pipe it is early, and the partner can still stop the damage on your side while the source is dealt with.
Radiator, Valve and Heating Pipe Weeps
A damp carpet beside a radiator, a falling boiler pressure gauge and a stain below a heating pipe suggest a slow heating-circuit leak. A leaking radiator valve is typically £100 to £200 in London. Where the weep is inside the boiler, our boiler repair page explains what the partner company checks.
What's In It for You
How a Leak Hunt Is Run
Working out the cause first keeps the invoice smaller.
Rule Things In and Out
Turn everything off, read the meter, check cisterns, seals and the loft tank. Many callers find the culprit before a survey is booked, and we tell you how to do the same.
Locate, Then Quote
The partner uses moisture meters, thermal imaging or acoustic listening to pin the leak down, then quotes the repair and any making-good in writing before work begins.
Record It for Everyone Else
You receive notes of where the fault was and what was found, which helps with a landlord claim, a neighbour dispute or a claim on your own cover without us naming any provider.
Handy to Know
Spotting a Leak Early
Small signs usually show weeks before a ceiling comes down.
Signs of a Hidden Leak
Any two of these deserve a call.
- A water meter that moves when every tap is off
- Damp, peeling paint or bubbling plaster on a wall
- A musty smell in a cupboard, under stairs or in a flat
- A boiler pressure that drops and needs topping up
- A water bill much higher than the same month last year
What to Do While You Wait
These steps limit the damage.
- Close the stopcock if water is actively dripping
- Move furniture and electrics away from wet walls
- Photograph the stain with a date for your landlord
- Place a bowl or towel below a dripping ceiling
- Do not pierce a bulging ceiling without ringing first
What You Can Expect
Leaks in Flats, Estates and Conservation Areas
The building decides how a repair is allowed to happen.
Shared Stacks in Victorian Conversions
Many W12 conversions share a stack and a supply. A leak between floors may sit in a pipe that serves both flats, so the freeholder or managing agent can be responsible. We ask who that is on the first call.
White City Risers and Heating
In the estate blocks and the new Television Centre apartments, risers and communal heating are the landlord's. A weep on a riser is reported to them, and we do not send a partner to open a communal cupboard without permission.
Care Around Period Features
Hammersmith's Bradmore and Brook Green conservation areas hold Victorian cornices and original floors. Tracing the leak before opening up means smaller holes, and the partner can plan access to avoid unnecessary damage.
A leak is often the first sign of something bigger, so see burst pipe repair if water is flowing now and emergency plumbing for out-of-hours help. If damp has followed a heating fault, read about central heating repair, and our Hammersmith page covers the conservation-area streets where careful access matters. The full list is on our services page.
What Is Leak Detection?
Leak detection is the process of locating a fault in a pipe, joint, seal or fitting that you cannot see, using tests and instruments rather than guesswork. It covers supply pipes, heating circuits, wastes and, in some cases, roofs and external pipework.
The aim is to reduce the damage done by finding it. Meter readings, pressure tests, moisture meters, thermal cameras and listening equipment each narrow the field. The repair that follows has to meet the Water Supply (Water Fittings) Regulations 1999, with WRAS-approved fittings used wherever pipework is replaced.
What Affects the Price of a Leak Job
Survey, Access and Repair
There are three separate costs: finding the leak, getting to it and mending it. Published UK ranges show each can be modest or large, so asking for the figures separately is sensible. A simple fix at an accessible joint can be far cheaper than opening a ceiling.
Building Type and Ownership
A leak in a shared pipe is the freeholder's cost, and the partner company will tell you that rather than charge you for it. Knowing the answer before you pay is the purpose of the first call.
Leaks in Rented Flats and Shared Buildings
Most W12 leak calls involve more than one party: a tenant, a landlord, a neighbour and sometimes a managing agent. Write down the date you first saw the stain, photograph it weekly and tell your landlord in writing. That record settles who knew what and when.
We will not send a partner company to open up a wall in a rented flat without the owner's agreement, because the repair belongs to them. What we can do is arrange the survey, pass the written findings to whoever is responsible and stop active damage while the argument over cost is resolved. The pipe does not wait for the paperwork, and neither do we.
If you are unsure whether to book a survey at all, ring first. A five-minute conversation about the meter, the stain and the building often shows whether a survey is needed.
Good Questions
How much does leak detection cost in London?
Published UK guides in 2026 put a hidden-leak survey at roughly £150 to £750, depending on the property and whether a written report is included. Thermal imaging alone is about £150 to £500, and opening up a wall or ceiling to reach the pipe adds £150 to £1,000 or more. These are other firms' ranges, not our quotes, and the partner company quotes your job in writing.
Can you find a leak without lifting my floors?
Often, yes. A meter test, moisture meters, thermal imaging and acoustic listening can narrow a leak to a small area without opening anything. The partner company then lifts only the board or section of plaster needed to reach the pipe. Some leaks, particularly under screed, still need a small opening, and you will be told this in the written quote.
My water meter moves when everything is off. What does that mean?
It means water is passing somewhere you cannot see. Check the toilet cisterns first, since a silent running cistern is the commonest cause, and then the garden tap and any outside pipework. If the meter still creeps, you probably have a leak on the supply or under a floor, and a survey is the sensible next step.
The ceiling in my flat is stained. Is the leak mine?
Usually the water comes from the flat above or a shared pipe, but not always. A stain that grows when the neighbour uses the bath points to their waste or shower tray, while one that appears after rain points to the roof. We help you work out which, and a partner company can stop the damage on your side while the landlord or freeholder deals with the source.
Who pays if a shared pipe is leaking in my building?
In most blocks and converted terraces, a pipe serving more than one flat belongs to the freeholder or managing agent, and they arrange and fund the repair through the service charge or building cover. A pipe serving only your flat is yours. We ask about the building on the first call and tell you honestly which side of that line the leak falls.
Does hard water cause leaks in Shepherd's Bush?
Thames Water classes all its water as hard, with a published London reference figure of about 266 mg/l, and limescale can build up on valve seats, taps and heating components. This mostly causes weeping valves and sticking parts rather than burst pipes. Replacing a tired valve before it fails is cheaper than the water damage it causes.
How do I know it is a leak and not condensation?
Condensation appears as beads of water on cold windows and walls, mainly on cold mornings, and clears when the room is ventilated. A leak keeps getting worse regardless of the weather, often leaves a tide mark, and may be accompanied by a rising bill or falling boiler pressure. If you cannot tell, the partner company can check with a moisture meter.
What standards apply to a pipe repair?
Repairs to water supply pipework must comply with the Water Supply (Water Fittings) Regulations 1999, which require approved, non-contaminating fittings, and the work should follow BS EN 806 where it applies. The partner company uses WRAS-approved fittings and the manufacturer's instructions. The written quote states what is being replaced, so you can see what you are paying for.
Will you make good the plaster and decoration afterwards?
The plumbing partner repairs the pipe, and the quote states plainly whether making good the wall, floor or ceiling is included. Often it is not, since plastering and decorating are separate trades. We would rather tell you that on the call than leave you with an unexpected hole, and the partner can usually recommend how to arrange the finishing.
What if the leak is in a communal riser at White City?
Report it to the landlord or managing agent straight away, because risers and communal heating belong to the building. A partner company cannot normally open communal cupboards without permission. If water is entering your flat, they can stop the damage inside your door and give you a written note of what they found for the landlord.
My boiler pressure keeps dropping. Is it a leak?
Probably. A sealed heating system should hold steady pressure, so repeated top-ups mean water is escaping from a radiator valve, a pipe joint, the expansion vessel or the boiler itself. Do not keep topping it up indefinitely, because new water carries fresh oxygen into the system. Ring us and the partner company will trace the weep.
