Emergency plumber — London
Emergency Plumber London
Burst pipes, flooding, no heating in the depths of winter, or a boiler that has failed on a Sunday night. When water is spreading or a home has gone cold, minutes matter. We attend urgent call-outs across London to stop the damage first, then repair the cause properly, with the emergency rate confirmed with you before anyone sets off.
£90–£150
Typical London emergency plumber call-out (evenings/weekends, 2025)
60 mins
Realistic priority attendance window for active flooding in central London
Under 5°C
Outside temperature at which unlagged pipes are most likely to freeze and split
1 in 4
Winter emergency callouts caused by frozen or burst pipework
On this page
What makes a plumbing problem a genuine emergency
Not every plumbing fault is an emergency, and knowing the difference matters, because it changes both how fast you need help and what you should do in the meantime. A genuine plumbing emergency is one where water is actively escaping and cannot be stopped by you, where a property has lost its only source of heating in cold weather, or where a fault presents a health or safety risk such as sewage backing up into a living space. A dripping tap or a slow-running drain, however annoying, can usually wait for a scheduled repair; a split pipe spraying water behind a wall cannot.
London's building stock and climate create a fairly predictable emergency pattern each year. The first sustained cold snap of winter reliably brings a wave of burst pipes, as water trapped in unlagged pipework in lofts, under suspended floors and against external walls freezes, expands and splits the pipe — the leak often only becomes visible once the ice thaws and water starts flowing through the crack. High-rise and ex-local-authority blocks bring a different risk profile: a burst on a riser or a failed valve several floors up can flood multiple flats below before anyone upstairs even notices. Older converted properties, meanwhile, often have poorly documented pipe runs, which is exactly why finding the right isolation valve quickly is so important in an emergency.
Because an emergency call-out happens under pressure and often outside normal hours, it is also where people are most likely to be overcharged or rushed into unnecessary work. The priority in a genuine emergency is always the same, in this order: stop the water or restore safe heat, limit further damage, and only then move on to a full, properly quoted repair once the immediate danger has passed. Anyone offering to skip straight to a large fixed-price repair before the emergency itself is under control is getting the order wrong.
Scope of work
Emergency plumbing call-outs we attend across London
Every emergency job starts with stopping the immediate problem, then addressing the cause. These are the situations we are set up to respond to at short notice, day or night.
Burst and split pipes
Rapid attendance to locate a burst, isolate the affected section at the nearest valve or the mains stopcock, and stop water spreading further into floors, ceilings and neighbouring properties. Once the immediate flow is stopped, we assess whether a temporary repair or a full section replacement is needed.
Internal flooding
Attending properties where water is actively pooling from a failed appliance connection, a burst supply pipe, or an overflowing cistern. We isolate the source first, then advise on next steps for drying out and, where relevant, liaising with an insurer.
Total loss of heating in cold weather
Diagnosing why a boiler or heating system has stopped working entirely during winter, particularly for households with young children, elderly residents or anyone medically vulnerable to cold. We prioritise restoring safe heat, including temporary measures, ahead of a full boiler diagnosis if that will take longer.
Frozen and burst pipes in cold snaps
Locating frozen sections of pipework before they split, and dealing with pipes that have already burst as the ice thaws. We identify why that section froze — usually inadequate lagging in a loft, garage or against an external wall — so the same failure does not repeat next winter.
Boiler and heating system breakdowns
Emergency diagnosis of boilers that have lost pressure, are showing a lockout fault, or have stopped firing altogether, with particular urgency for households with no other source of heat or hot water. Where a part needs ordering, we advise honestly on realistic timescales rather than promising an unrealistic same-day fix.
Blocked drains causing internal flooding
Attending blockages that are causing water or waste to back up into a bathroom, kitchen or garden rather than draining away normally. This is treated as an emergency where the backup presents a hygiene risk or is actively flooding living space, distinct from a slow-draining sink that can wait for a scheduled visit.
When to act
When to call an emergency plumber rather than wait
Some faults genuinely cannot wait until morning or until a scheduled appointment. Recognise these situations and act immediately, starting with isolating the water where you safely can.
Water spraying, gushing or pooling that you cannot stop
If water is actively escaping from a pipe, joint or appliance connection and turning off the local isolation valve or main stopcock does not fully stop it, this is an emergency. The longer active water flow continues, the more it spreads into floors, ceilings below and neighbouring properties.
No heating at all during freezing weather
A complete loss of heating is a different situation in July than in January. When outside temperatures are at or below freezing and a property has no working heating and no realistic backup, particularly with children, elderly occupants or anyone medically vulnerable present, this counts as urgent rather than something to book in for next week.
A ceiling or wall that is bulging, dripping or has collapsed
Water pooling above a ceiling before it comes through is a sign of significant volume, and a bulging or sagging section can collapse suddenly. Do not stand directly underneath it, and treat this as urgent even if the leak itself is not currently visible.
A boiler that has completely lost pressure or locked out in winter
A boiler that will not fire at all, rather than one that is simply running less efficiently, needs urgent attention once temperatures drop, since pipework left without heat can itself then be at risk of freezing. Check the pressure gauge and any lockout code before calling, as this speeds up diagnosis.
Pipework that has frozen but not yet burst
A tap that has stopped running, or a radiator that has gone cold and cannot be bled, during a cold snap can mean the pipe feeding it has frozen. Acting before it thaws and splits is far cheaper than dealing with the burst afterwards, so this is worth an urgent call even though nothing is visibly leaking yet.
Sewage or waste water backing up into the property
Waste water rising back up through a toilet, shower drain or an outside gully rather than draining away is both a health hazard and usually a sign of a significant blockage or collapsed drain run. This should be treated as an emergency and the affected area avoided until a plumber has cleared and assessed it.
How it works
How we handle an emergency call-out, step by step
An emergency call is triaged differently from a scheduled repair — the priority is stopping the immediate danger, not a full fix, and everything follows from that.
01
Phone triage
We ask what is happening right now: is water actively flowing, can you locate a stopcock or isolation valve, is anyone at immediate risk from cold or flooding. This tells us how urgently to dispatch and lets us talk you through stopping or slowing the problem before the plumber even arrives.
02
Emergency rate confirmed before dispatch
Out-of-hours and weekend call-outs carry a different rate to a scheduled daytime repair. We confirm this rate with you over the phone before anyone travels, so there is no dispute about cost once the plumber is on site dealing with an active emergency.
03
Stop the immediate danger
On arrival, the first job is always isolating the water at the nearest valve or the mains stopcock, or restoring a safe minimum level of heat, whichever the emergency requires. This takes priority over a full diagnosis, because stopping the damage matters more in the first few minutes than understanding every detail of the cause.
04
Assess the damage and the cause
Once the immediate danger is controlled, we identify why it happened — a frozen and split pipe, a failed valve, a boiler component fault — and check for any secondary damage such as water that has already reached a ceiling, floor or neighbouring property.
05
Temporary versus permanent repair
Where a full permanent repair cannot be completed safely in the moment, for example a part needing to be sourced, we fit a temporary repair that makes the property safe and usable, and explain clearly what still needs finishing and roughly when.
06
Follow-up and prevention
We explain what caused the emergency and what would prevent it recurring, such as lagging exposed pipework before the next cold snap or addressing a valve that failed early. Landlords and agents can request a short written note for insurance or the property file.
Buyer guide
How to hire the right emergency plumber (and avoid being overcharged in a crisis)
An emergency is exactly the moment people are most likely to accept a bad price out of panic. A few checks, even made quickly over the phone, protect you from being taken advantage of while water is still running.
Get the emergency call-out rate confirmed before anyone travels
A genuine emergency plumber tells you the out-of-hours rate on the phone before dispatching, not after arriving. If a company avoids giving a figure until someone is standing in your hallway, treat that as a warning sign and ask directly for the rate in writing by text before agreeing to a visit.
Know the difference between the call-out and the full repair cost
The emergency rate typically covers attendance and stopping the immediate danger, not necessarily the full permanent repair. Ask specifically whether the quoted figure includes fixing the burst pipe or boiler fault itself, or only the emergency isolation, so you are not surprised by a second charge.
Do not agree to a large fixed price before the emergency is even assessed
Be cautious of anyone quoting a large flat fee for "sorting everything" before they have seen the property or identified the cause. A legitimate emergency plumber stops the water or restores heat first, then gives you a proper price for the repair once the actual damage and cause are visible.
Ask what "emergency" actually means for their response time
"Emergency call-out" should mean genuine priority attendance, not simply the next available slot with a higher price attached. Ask for a realistic time window before booking, and treat a company that cannot give you any estimate at all with more caution, particularly if water is actively flooding a property.
Keep evidence for insurance from the start
If a burst pipe or flooding is likely to involve a home insurance claim, photograph the damage as it is found and keep a note of when the plumber arrived and what was done. A reputable emergency plumber will not object to this and can usually provide a short written note of the emergency work carried out.
Avoid paying the full amount in cash on the doorstep under pressure
Being asked for full cash payment immediately, before any invoice or written confirmation of the work done, is a common pressure tactic in genuine emergencies as well as a red flag for less scrupulous operators. A card payment or invoice with an itemised description of what was done protects you if anything about the repair needs revisiting.
2025 pricing
Emergency plumber costs in London (2025)
Emergency and out-of-hours rates are higher than scheduled daytime repairs, reflecting priority attendance outside normal working hours. The following are indicative ranges for 2025; we confirm the exact rate with you by phone before dispatching anyone.
| Job | Detail | Price range (2025) |
|---|---|---|
| Emergency call-out (evenings/weekends) | Priority attendance, first hour | £90 – £150 |
| Emergency call-out (overnight) | Late night or very early morning attendance | £120 – £200 |
| Burst pipe isolation and temporary repair | Stop the leak, make safe | £120 – £250 |
| Burst pipe permanent repair | Following temporary isolation, accessible section | £150 – £400 |
| Emergency boiler diagnosis | Total loss of heat, urgent attendance | £100 – £180 |
| Emergency drain unblocking | Internal flooding or backup | £120 – £280 |
Rates are higher outside normal working hours because attendance is prioritised over scheduled work. We always confirm the applicable rate on the phone before anyone is dispatched, and a full repair quote is given separately once the immediate danger has been dealt with and the cause properly assessed.
Get started
Emergency Plumber London — get a clear quote
Tell us about the property and the job. A qualified engineer confirms the scope, agrees a price before work starts, and issues the correct certificate on completion. All 33 London boroughs covered.
Common questions
Emergency Plumber London: frequently asked
What should I do immediately if a pipe bursts before the plumber arrives?
Turn off the water at the nearest isolation valve if you can reach it safely, or at the main stopcock, which is usually under the kitchen sink or where the supply enters the property. Switch off electrics in the affected area at the consumer unit if water is anywhere near sockets or light fittings, and move anything valuable away from the water. Do not attempt to cut into walls or ceilings yourself to find the leak; isolating the supply is the priority, and locating the exact fault is safer left to the plumber on arrival.
How quickly can an emergency plumber actually reach me in London?
This depends heavily on time of day, traffic and location, but a genuine priority call-out for active flooding is typically attended within around an hour in central and inner London, with outer boroughs sometimes taking a little longer. We give a realistic estimate on the phone based on your specific location and current job load, rather than a generic promise, so you know what to expect while dealing with the immediate situation.
Why do pipes burst specifically in cold weather?
Water expands as it freezes, and if it freezes inside a section of pipe with nowhere for that expansion to go, the pipe splits. This most commonly happens in unheated or poorly insulated spaces such as lofts, garages and pipework running against external walls. The crack itself often only becomes visible once the ice thaws and water starts flowing again, which is why a sudden leak sometimes appears a day or two after the coldest night, not during it.
Is a boiler breakdown in winter treated as a plumbing emergency?
Yes, particularly when it results in a complete loss of heating and hot water during cold weather, and especially where children, elderly residents or anyone medically vulnerable are in the property. We prioritise these call-outs similarly to active leaks, since sustained cold in a property carries its own risks, including an increased chance of pipework subsequently freezing if the heating stays off.
Will my home insurance cover emergency plumber costs?
Many UK home insurance policies cover emergency repairs needed to prevent further damage, sometimes through a dedicated emergency assistance helpline, though this varies by provider and policy level. It is worth checking your policy documents or calling your insurer alongside booking a plumber if the situation allows, and keeping photographs plus an invoice from the emergency work to support any claim.
What counts as a real plumbing emergency versus something that can wait?
A real emergency involves water actively escaping that you cannot stop yourself, a complete loss of heating in cold weather, or a health and safety risk such as sewage backing up into living space. A dripping tap, a slow-draining sink, or a toilet that flushes weakly are genuine faults worth fixing, but they can generally wait for a scheduled daytime repair rather than an out-of-hours call-out, which will cost more for the same underlying fix.
How can I stop my pipes from bursting again next winter?
The most effective prevention is lagging exposed pipework in lofts, garages and against external walls before the first cold snap, along with keeping heating on a low constant setting rather than switching it off entirely during very cold periods, particularly if the property is left empty. If a specific section has already burst once, it is worth having a plumber assess why that particular run was vulnerable, since the same conditions will otherwise cause it to fail again the following winter.