Plumbing repairs — London
Plumbing Repairs London
Dripping taps, running toilets, leaking joints, low pressure and noisy pipework, fixed properly the first time. Our plumbers diagnose the actual cause before touching a spanner, agree a fixed price before work starts, and leave every repair clean and tested. Landlords, agents and homeowners across London use us for both one-off repairs and ongoing maintenance.
£60–£100
Typical London plumber call-out and first hour (2025)
1 in 3
Repair callouts caused by worn washers or cartridges
15 psi
Minimum mains pressure most combi boilers need to fire properly
40+ yrs
Average age of pipework in unrenovated Victorian terraces
On this page
What counts as a plumbing repair in a London property
A plumbing repair covers any fault in the pipework, fittings, taps, toilets, valves and appliances that carry water around a building. That spans a washer replaced in a dripping tap, a cracked toilet cistern, a leaking compression joint under a sink, a shower that will not hold temperature, and pipework that bangs or knocks every time a tap is opened. The common thread is that something which should be sealed, controlled or quiet is not, and the fix requires someone who understands how the whole system behaves, not just the part that is visibly failing.
London's housing stock makes this a more varied trade than it looks from the outside. Victorian and Edwardian conversions often still carry a mix of old lead or galvanised steel sections spliced into later copper and plastic pipework, each joint a potential future leak. Ex-local-authority blocks and new-build high-rises sit at the other extreme, with pressurised systems and shared risers where a fault on one floor can show up as damp on the floor below. Hard water across most of Greater London accelerates scale build-up inside cartridges, valves and shower mixers, which is why taps that worked fine for years suddenly start dripping within the same year that neighbours report the same fault — it is the water, not bad luck.
Getting a repair right means treating the visible symptom as a clue rather than the whole story. A dripping tap is sometimes just a worn washer, but on a pressurised system it can also mean a failing pressure-reducing valve upstream. A toilet that "keeps running" is sometimes a warn flush valve, but on older cisterns it can be a corroded overflow that will eventually cause a ceiling leak in the flat below. A competent plumber traces the fault to its source before quoting, which is exactly why a five-minute washer swap and a full valve replacement can both start with the same complaint.
Scope of work
Plumbing repair jobs we carry out across London
From a single dripping tap to a full pipework overhaul, our plumbers handle repairs of every size, priced and explained before any work begins.
Dripping and stiff taps
Diagnosis and replacement of worn washers, ceramic disc cartridges and O-rings in mixer taps, monobloc taps and traditional pillar taps. We check whether the tap body itself has corroded before recommending a repair over a full replacement, so you are not paying twice.
Toilet repairs
Fixing running cisterns, weak or double flushes, leaking flush valves, cracked cisterns and rocking or leaking pan connections. We test the full flush cycle after every repair, not just the part that was obviously broken, since a warn flush valve and a failing fill valve often arrive together.
Leaking pipework and joints
Locating and repairing leaks at compression joints, soldered joints, push-fit fittings and pipe runs behind cupboards, under floors and in boxed-in sections. Where old pipework has failed at multiple points, we advise honestly on repair versus replacing the affected run.
Low or fluctuating water pressure
Diagnosing whether low pressure is caused by a failing pressure-reducing valve, scale build-up in old pipework, a partially closed stopcock, or a supply-side issue from the water company. We test pressure at multiple points in the property to isolate the actual cause rather than replacing parts on a guess.
Noisy pipework (water hammer and knocking)
Fixing banging pipes caused by loose pipe clips, missing air cushions, worn tap washers or high mains pressure. Left alone, water hammer loosens joints over time and turns a noise complaint into a leak, so we treat the cause rather than just quieting the symptom.
Shower and mixer valve repairs
Repairing and replacing thermostatic cartridges, diverter valves and mixer showers that scald, run cold unexpectedly or lose pressure. Hard water scale is the most common cause in London, and we descale or replace the cartridge depending on its condition and age.
When to act
Warning signs you need a plumbing repair
Small plumbing faults rarely fix themselves and usually get more expensive the longer they are left. Watch for the following signs and book a repair early rather than waiting for a full failure.
A tap that drips even when fully closed
A constant drip is not just wasted water — over months it can stain the basin, corrode the tap seating and, on a water meter, add a noticeable amount to your bill. It almost always means a worn washer or cartridge rather than anything more serious, so it is one of the cheaper repairs to catch early.
A toilet cistern that refills on its own
If you hear the cistern topping itself up every few minutes without anyone flushing, water is escaping past the flush valve into the pan. Beyond the wasted water, a warn valve often deteriorates further and can eventually overflow, so it is worth booking before it becomes a leak into the flat below.
Damp patches, staining or bubbling paint near pipework
A stain that slowly spreads on a ceiling or wall below a bathroom or kitchen almost always means a slow leak in the pipework or waste above it. These leaks are often intermittent and hardest to trace without opening up the affected section, so the earlier you call, the less making-good is needed.
Banging or knocking pipes when taps are used
A loud bang when a tap or washing machine valve shuts, known as water hammer, indicates unsecured pipework or excess pressure. Over time the repeated impact loosens joints and can crack older fittings, so it is worth having checked even though it may seem like a minor annoyance.
Water pressure that has dropped noticeably
If showers, taps or the kitchen mixer have gradually weakened, the cause is usually scale build-up inside pipework or a failing pressure valve rather than the water company. A sudden drop across the whole property, rather than a gradual one, can point to a leak elsewhere in the system.
A shower that runs hot and cold unpredictably
A mixer shower that will not hold a steady temperature, or that suddenly runs cold when another tap is used elsewhere in the property, usually indicates a scaled or failing thermostatic cartridge. This is worth fixing promptly, since a failed cartridge can also allow scalding water through without warning.
How it works
How we handle a plumbing repair, step by step
Whether it is a five-minute washer change or a multi-day pipework repair, we follow the same sequence: diagnose properly, agree the price, fix it, and test it before we leave.
01
Diagnosis over the phone or on site
We ask what you are seeing (drip, noise, damp, pressure) and when it started, which narrows down the likely cause before the plumber even arrives. For anything unclear, an on-site diagnostic visit isolates the actual fault rather than guessing from a description.
02
Fixed price agreed before work starts
Once the cause is identified, you receive a clear price for the repair, covering labour and parts. We flag anything that could change the price on site, such as a corroded fitting discovered once a panel is opened, before proceeding rather than after.
03
Isolating the water supply
The affected section is isolated at the nearest stopcock or isolation valve so the rest of the property keeps running water where possible. On older properties without local isolation valves, we explain this before starting so there are no surprises about a temporary full shut-off.
04
Carrying out the repair
Worn parts are replaced like-for-like or upgraded where the original part is obsolete or poor quality, and any old, discoloured fittings are inspected while we have access. We protect flooring and worktops during the job and clear away old parts and packaging.
05
Pressure testing and leak checking
Every repair is tested under normal running pressure before we consider the job finished, including checking neighbouring joints that were disturbed during access. A repair that looks dry immediately after work is not the same as one that stays dry under sustained use, so we run taps and flush cisterns before leaving.
06
Explanation and aftercare
We explain what was actually wrong and why, in plain terms, along with anything worth keeping an eye on. Landlords and agents can request a short written note of the work carried out for their records or for a tenant file.
Buyer guide
How to hire the right London plumber (and avoid being overcharged)
Plumbing repairs are quick, largely invisible once finished, and easy to overcharge for if you do not know what to check. Use these points to make sure you are hiring someone competent rather than someone opportunistic.
Ask for a fixed price, not an open hourly rate
A vague "we will see how long it takes" invites a longer job than necessary. A trustworthy plumber gives you a fixed price for the described repair once they understand the fault, adjusting only if something genuinely unexpected is found once the work is opened up — and they should explain that change before continuing, not after.
Get the call-out fee and first-hour rate in writing before booking
London call-out fees and first-hour rates vary widely. Ask what is included in the call-out charge, whether it covers the first hour of labour, and whether there is a minimum charge even for a five-minute fix. Getting this confirmed by text or email before the plumber arrives avoids arguments at the door.
Be wary of scare tactics about "the whole system"
A dripping tap does not usually mean the whole property needs repiping, and a running toilet does not usually mean a new bathroom suite. If a plumber jumps straight from a small fault to a large, expensive recommendation without explaining the specific evidence for it, ask them to show you the fault directly, or get a second opinion.
Ask what parts will be used before they are fitted
Cheap own-brand cartridges and washers fail faster than trade-standard parts, particularly in London's hard water. Ask whether the parts being fitted are a proper match for your existing tap or valve brand, since a mismatched cartridge is one of the most common causes of a repeat callout within months.
Do not pay the full amount before the repair is tested
A repair should be tested under running water, with the plumber present, before you settle the bill. Paying in full and being told to "let us know if it happens again" is not the same as watching the fix hold under normal use before the plumber leaves.
Ask for a note of the work if you are a landlord or agent
For rented or managed properties, a short written record of what was repaired, when, and what parts were used is worth having for the tenant file, insurance, or a future EICR-style maintenance record. A reputable plumber will provide this on request without extra charge.
2025 pricing
Plumbing repair costs in London (2025)
The following are indicative London price ranges for 2025, covering labour and standard parts. Actual cost depends on access, the age of the fittings and whether parts need sourcing to match an existing brand. We agree a fixed price after diagnosis, before any work starts.
| Job | Detail | Price range (2025) |
|---|---|---|
| Call-out and diagnosis | First hour, covers most single-fault visits | £60 – £100 |
| Tap washer or cartridge replacement | Per tap, standard parts | £70 – £140 |
| Toilet cistern repair | Flush valve or fill valve replacement | £90 – £160 |
| Leaking joint repair | Accessible pipework, single joint | £90 – £180 |
| Shower mixer valve or cartridge | Supply and fit, standard brand | £150 – £320 |
| Pipework section replacement | Short run, accessible location | £180 – £450 |
Prices assume reasonable access to the fault. Boxed-in pipework, tiled surrounds and shared risers in flats can add time for access and making good, and we always flag this before starting rather than adding it to the bill afterwards. Landlord and agent accounts can arrange invoicing across multiple properties.
Get started
Plumbing Repairs 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
Plumbing Repairs London: frequently asked
Why does my tap keep dripping even after being fixed before?
A repeat drip usually means either the wrong replacement part was fitted originally, the tap seating itself has worn (which a washer alone will not fix), or London's hard water has caused rapid scale build-up on a cartridge that was already borderline. We check the tap body and seating condition, not just the washer, so a repeat visit fixes the actual cause rather than swapping the same part again.
Is a running toilet actually costing me money?
Yes. A cistern that continuously trickles into the pan can waste a significant amount of water over a billing period, and on a water meter that shows up directly on your bill. Beyond cost, a worn flush or fill valve tends to deteriorate further rather than staying stable, so what starts as a faint trickling sound can progress to a valve that no longer shuts off at all.
Why has my water pressure dropped over time rather than suddenly?
A gradual drop across months, rather than an overnight change, is the classic sign of scale building up inside pipework or a shower cartridge, which is common given how hard London's water supply is. A sudden drop is more likely to indicate a leak, a partially closed valve, or a supply-side issue, so the pattern of how the pressure changed helps narrow down the cause before a plumber even arrives.
Can you repair old lead or galvanised pipework, or does it need replacing?
It depends on the extent of the corrosion. A single failed joint on an otherwise sound run can sometimes be repaired or spliced into modern pipework. Where galvanised steel has corroded internally along its length, patch repairs tend to fail again nearby within months, and replacing the affected run is usually the more honest long-term answer. We will tell you which situation you are in rather than defaulting to the more expensive option.
Do you charge extra for repairs in older Victorian or Edwardian properties?
Not as a blanket rule, but access can genuinely take longer where pipework is boxed in, chased into solid walls, or mixed between old and newer materials. We always look at the specific job before quoting a fixed price, and if a period property is likely to need extra time for access, we explain that as part of the quote rather than as a surprise on the invoice.
What should I do myself before a plumber arrives for a leak?
If you can locate the stopcock (usually under the kitchen sink or near where the mains enters the property) and it is safe to reach, turning it off limits further water damage while you wait. Avoid attempting to dismantle taps, valves or cisterns yourself if you are not confident, since a poorly reassembled fitting is a common cause of a leak becoming worse rather than better before help arrives.
Do landlords need anything specific after a plumbing repair for a tenanted property?
There is no separate legal certificate for a plumbing repair the way there is for gas or electrical work, but landlords are expected to keep the property in a reasonable state of repair and to be able to show that reported faults were dealt with promptly. We provide a short written note of the work carried out on request, which is useful to keep alongside the tenancy file in case of a dispute or a future inspection.