Moisture detector (moisture testing meter) against a wall with rising damp, reading high moisture content.
Moisture detector (moisture testing meter) against a wall with rising damp, reading high moisture content.

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4.0

Great rating - 4/5 (13330+ reviews)

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Recent Leak Detection reviews in Central London

I would definitely recommend Christopher. Very good service. He was available on short notice & friendly. He identified the problem quickly, explained what the issue was & what my options were. In the end, he changed the leaky pipes & installed a new faucet & took time to check that everything was working properly. He managed to resolve the issue quickly, within a couple of hours eventhough he had to go & get some additional part within that time.

Leak under the kitchen sink

£100

Christopher was professional and punctual. He did a fantastic job in changing the bathroom tap.

Tap in bathroom leaking from top when used

£70

Professional guy

Pipe leakage

£40

Good communication throughout and showed me where the problem was. Polite and reliable would highly recommend.

Toilet is leaking

£75

Quick service, very professional and fixed my problem.

Fix leaking tap

£100

Very responsive and helpful - thank you!

Fix and replace leaking pipe

£80

What's the average cost of a leak detector in Central London

£74 - £130

low

£74

median

£100

high

£130

Low, median and high bar chart distribuiton

Average reviews for Leak Detection Services in Central London

based on 242 reviews

4.96

238
2
0
1
1

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What do leak detection services include?

To keep your home safe from water damage, it's crucial to work with expert moisture leak detectors for a thorough job. Some leak sources can be difficult to locate, especially when using minimally invasive procedures that enable you to preserve your home's integrity. 

By booking a leak detection service on Airtasker, you can enjoy the following:

Site assessment

Every leak detection process begins by thoroughly assessing your property. Taskers will identify areas most likely to have a leak (a step also called prelocation) by checking for visible signs like damp walls, blistered plaster, or pooling water outside. You can also expect them to perform advanced inspections, such as monitoring the water meter for unseen leaks, provide you with further insights and help them plan the next steps.

Advanced leak detection

The goal of moisture leak detectors is to locate and repair leaks without any unnecessary damage to your property. They do this by using tools like thermal imaging, inspection cameras, ground listening devices, and acoustic sensors to quickly identify possible leak areas and confirm where the leak exactly is. If at all required, tracer gas (usually helium) can be used to track stubborn leaks.

Detailed reporting

Once the leak is detected, your hired moisture leak detector will provide a detailed report. This report includes images and recommendations on how to move forward. They will walk you through your options based on the findings — whether you'll need extensive repairs or minor fixes will suffice. 

If the source of leaks turns out to be significant damage on your roof, fascia, or downpipe, you can work directly with a specialist to make the necessary repairs or replacements to these key parts of your home. Leaks can also be caused by a faulty hot water system. If this proves to be the case, you can book a Tasker specialising in this area.

Post-repair restoration

Following the repair, your Tasker can offer additional support such as water damage remediation and industrial drying. Feel free to inquire about these services in advance to ensure you hire an expert who can accommodate these extra steps for long-term protection.

Recent Leak Detection tasks in Central London

2 sinks need leaks investigating and fixing

£125

Bounds Green, Greater London, N11

22nd Jul 2026

1 sink is leaking from the tap, another from the pipes underneath. Photos attached of both issues. We do not have any replacement parts!

Fix my leaky tap

£100

North Southwark, Greater London

19th Jul 2026

Kitchen tap is leaking due to cold water valve (it is a tap with a single spout for both hot and cold water)

Plumber needed for leak under kitchen sink

£100

Tulse Hill, Greater London

19th Jul 2026

There's a leak at the connection between the out pipe from the dishwasher and the drain under the kitchen sink. We need someone to take a look and replace parts. Dishwasher isn't draining properly and we don't know if this is the cause or not.

Replace Leaking Corroded Central Heating Return Pipe Under Boiler

£150

Bloomsbury, Greater London

17th Jul 2026

I'm looking for a fully qualified plumbing and heating engineer to replace a leaking, corroded section of my central heating return pipe beneath a Vaillant boiler. The job will likely involve: Draining down the central heating system. Cutting out and replacing the corroded leaking section of pipe (likely with 15 mm copper pipe). Refilling and repressurising the system. Bleeding the radiators. Pressure testing and checking for any further leaks. The leak is on the exposed vertical pipe beneath the boiler, and I've attached photos showing the affected area. Please only quote if you are a fully qualified plumbing and heating engineer with experience working on domestic central heating systems.

Toilet cistern leaking at the base — need diagnosis and repair

£100

Strand, Greater London

16th Jul 2026

My toilet cistern is leaking water from underneath the tank, dripping down onto the floor beneath it. I've traced the water with dye/marker lines and confirmed the leak is coming from the bottom of the cistern rather than higher up on the tank walls. I haven't been able to find a visible crack on the outside of the tank, so it may be a failed seal or washer rather than a crack in the porcelain — possibly the flush valve outlet washer, the tank-to-pan connecting bolts, or the fill valve inlet seal (photos attached showing the internal fittings). It could also be a hairline crack near the base that isn't visible without draining and drying the tank fully. Looking for someone to: Properly diagnose the exact source of the leak (washer/seal vs. crack) Replace the faulty washer/seal, or replace the cistern/toilet if the tank itself is cracked Happy to send more photos. Water has been temporarily patched but needs a proper fix.

Leaky pipe

£80

Honor Oak, Greater London

9th Jul 2026

The pipe is leaking under the sink

Check leak from bath and pipes

£60

Brixton, Greater London, SW9

8th Jul 2026

Small amount of water coming through the light in the flat below under our bathroom. Just need someone to check the sealant around the bath and take the side of the bath off to look at the pipes. Image attached of the leak coming through the neighbours light.

Need to fix clogged/leaking sink

£50

Bayswater, Greater London, W2

8th Jul 2026

NEED A HANDYMAN TODAY TO FIX LEAKED/CLOGGED SINK IN A RENTED FLAT IN LONDON. MUST BE COMPLETED BEFORE 5PM. PLEASE BRING YOUR OWN TOOLS. NEED PHOTO CONFIRMATION AFTER. JOB MAY LEAD TO REGULAR WORK.

Quick and efficient

toilet is leaking water when it is flushed

£100

Walworth, Greater London

6th Jul 2026

Hello, our toilet is leaking water from between the cistern and pan when it is flushed, leaking stops when flush finishes. Can you fix it?

The best plumber in SE17, ao happy to find him on airtasks, give him all your plumbing jobs!

Kitchen sink valve leak

£70

Highbury, Greater London, N5

3rd Jul 2026

the pipes under my sink, that seem connected to the dishwasher, are leaking everytime the dishwasher runs. I'm not sure how to remove it, but I suspect it needs to be cleaned.

Ahmed was super friendly, expert in his knowledge, and extremely fair and human in his approach, transparent and very efficient - work was done quickly, and he even went above and beyond to fix more things. Could not recommend more.

Radiator is leaking from bolt next to valve

£100

Clapham, Greater London, SW4

2nd Jul 2026

Radiator dripping from bolt next to valve

Leaking pipes under sink

£60

Noel Park, Greater London

30th Jun 2026

Couple of odd jobs. 1. There is leaking under the kitchen sink. I’m fairly sure it’s from a poorly sealed dishwasher waste pipe pictured, but please check behind dishwasher to make sure there of no leaking elsewhere. 2. Fix the board to the frame under the bath.

Nice guy. Punctual. Did a good job at a good price. I’m a happy customer.

My shower is blocked and causing a leakage

£20

Islington, Greater London, N1

29th Jun 2026

My shower is blocked and it’s causing a leakage. I used heavy duty drainage cleaner but nothing seems to work

Leak thermal detention

£150

Haggerston, Greater London, E2

26th Jun 2026

Downstairs neighbours have a leak and believes comes from my flat. We had a plumber today who open a few tiles and he thinks it comes from a hutch I have on the bathroom with the waste pipe joint from kitchen and shower but I don’t want to ripped everything until we know for sure where is coming from. Can a thermal camera asses the Leak to take action?

Full plumbing job to stop a leak

£350

Streatham, Greater London, SW16

26th Jun 2026

PLUMBING JOB - LEAK. Evidence of water staining on joist under basion and toilet. Toilet and close couple kit that seals and connects the cistern to the toilet pan is damp and rusted - all need replacing. The filling valve inside toilet doesn't turn off and overflowes. Toilet is not secured and moves around. Basin tap has damp dark staining underneath - possibly slowly leaking down pipes into ceiling. Mixer amd flexi connectors need replacing. Bath tap and bath screen all need replacing. Drainage pipe from bath soil stack needs disasembling and descale cleaning and reassembly; remove blockage from bath so that it drains properly. Also, ceiling repair and make good damage quotation please.

Leakage on below side of toilet seat.

£50

Norbury, Greater London

24th Apr 2026

Its leakage on the below side of toilet seat Need plumber who can fix this Thanks

Amazing and efficient work

Plumber to I nvestigate leak from kitchen sink

£60

Balham, Greater London

11th Apr 2026

There is a slow leak coming from the kitchen sink which I don’t know how to fix and would like some help from a plumber.

Efficient, punctual and fixed the problem quickly.

Water leak check

£50

Leyton Marshes, Greater London

10th Mar 2026

I am looking for a professional plumber to visit my house and investigate a possible water issue. My property appears to be consuming around 64 litres of water per day, and I would like to check whether there is a hidden leak, faulty valve, toilet cistern problem, or any other plumbing issue causing unnecessary water usage. I would appreciate it if you could visit the property, inspect the plumbing system, and advise on the cause and possible repair. The property is located in Leyton (E10), East London. Please let me know: • Your call-out fee • Availability for a visit • Whether you can check the water meter and internal plumbing for leaks Would be able to provide paperwork work of your inspection Thank you.

Excellent work done

Bathroom sink leaking - plumber needed

£60

Holloway, Greater London

7th Feb 2026

sink leaking in bathroom - need a qualified plumber to look at it asap.

super professional, helpful and great communication! Very much recommended!

Mixer Tap Leaking in Kitchen (Cartridge Replacement)

£115

Shacklewell, Greater London

3rd Feb 2026

Issue: Kitchen mixer tap leaking from the gap between the hot/cold handle. The water dribbles down the shaft when in use. No flooding, the tap is still usable for now, but needs dealing with. Thoughts:likely a cartridge replacement or issue with sealing. I'd rather not replace the whole tap, but you'll do a diagnosis first and we'll discuss. Hopefully, it's a short one-and-done job: There's a Screwfix and a Toolstation nearby. If after diagnosis, the right part is available, I can nip off and buy it. Or, I can purchase one from you if you carry spares... Budget is for labour if this is the kind of job we're looking at... I'll cover you for parking vouchers during your visit as needed.

Ali came, and knew exactly what to do. Thanks!