Plumbing · King's Cross, London
Blocked Drains in King's Cross, London
Drains seem to choose their moment: the Sunday lunch after a full house of guests, the night before a flight from St Pancras, the first heavy storm of autumn. [Anytime Plumber London](/) takes the call on 07588 689186 whatever the hour and sends the independently owned plumbing company nearest to you that has drain-clearing kit, so a blocked toilet or a gurgling gully is not left standing until Monday.
In this part of London the first question is often not how to clear the drain but whose drain it is. Camden's own flood work names surface water and sewer surcharge as the borough's main flood risk and blames the August 2002 flooding, which caused over £1 million of damage, on overloaded sewers. From the 2011 private sewer transfer, Thames Water owns the sewers that sit beyond a property boundary, while the pipe inside your boundary stays with you.
Published London prices put manual clearance at about £100 to £180, high-pressure jetting at £180 to £350 and a blocked toilet at £100 to £200. A CCTV drain survey typically adds £150 to £400, with complex jobs running to £500 to £800, and one guide notes inner London sits 15 to 20 per cent above outer London. These are published ranges, not our quotes; the partner company confirms its own price in writing before it starts.
Under the streets here run the culverted River Fleet, the Regent's Canal and drainage laid for Georgian squares, Victorian terraces and goods-yard sidings. Old cast-iron stacks, clay branches and shared runs through converted houses mean a blockage in one flat can surface in another.
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What We Do
Blockages We Arrange to Clear
The right tool depends on how far along the line the problem sits.
Toilets, Sinks and Showers
One fixture draining badly points to a blocked trap or waste pipe. The partner company uses a plunger, hand auger or short rods and tells you what it found. A toilet that will not clear and sits above a student let or a hotel room is worth a quick call before it becomes a ceiling stain below.
Kitchen Waste and Soil Stacks
In Georgian conversions the kitchen waste and the toilet often join a shared cast-iron stack. Grease builds in the lower runs, and a blockage there affects every flat above the join. High-pressure jetting scours the pipe wall, and the partner will say whether the stack is yours or the building's.
Gullies, Basements and Manholes
Basement flats and canal-side or railway-side buildings in Camden Town can see water rise in a gully after a storm. The partner clears the property side, checks whether the public sewer is full, and tells you when to report it to Thames Water instead of paying for it yourself.
The Benefits
How a Clearance Is Run
Diagnosis first, then the method that fits.
Locate Before Clearing
The partner checks which fixtures are affected and finds the nearest access point, so the blockage is located before any quote. The written price follows.
Clear and Prove It
Rods or a jet clear the line, then water is run to confirm the flow. Building Regulations Part H sets the standard for access and falls, so a collapsed run is called out, not hidden.
Camera When It Keeps Returning
A drain that blocks twice in a season deserves a CCTV survey. It shows cracks, offset joints or roots, and the repair is quoted separately so you decide.
Good to Know
Spotting a Drain Before It Fails
Drains complain before they stop.
Early Warnings
Catch these and the call-out is usually cheaper.
- A toilet that gurgles when the washing machine empties
- Water that lingers in a shower tray or basin
- A drain smell near a gully, a basement floor or a bathroom
- Damp patches along a wall where a stack runs
- Foul water in a ground-floor gully after rain
Keep Out of the Drain
The common causes of repeat calls in flats and houses here.
- Cooking fat and oil poured down the sink
- Wet wipes of any label, including those marked flushable
- Nappies, sanitary products and cotton buds
- Hair without a strainer or hair catcher
- Leaf litter and silt left in a yard gully
Why Us
Drains Under Camden and Islington
Three layers of history sit under these roads.
The Buried Fleet
The River Fleet runs culverted beneath Farringdon Road and on through Camden. Low basements near it feel a full sewer first when heavy rain hits.
Squares and Their Trees
The plane and lime canopy over Bloomsbury's squares drops leaves into gullies each autumn, and root pressure on old clay branches is a realistic cause of repeat blockages.
Estates and Communal Runs
Somers Town, Spa Green and the Finsbury Estate share stacks and drains between many homes, so who clears what is a landlord's question as well as a plumber's.
A blocked drain rarely travels alone, so our pages on emergency plumbing and toilet repair cover the problems that tend to come with it. Where a stack is shared with neighbours, the notes on Bloomsbury explain what the older houses look like inside. Browse all services.
What Is a Blocked Drain?
A blocked drain is an obstruction anywhere between a fixture and the public sewer. It may sit in the trap under a basin, in the branch serving a bathroom, in a shared stack that serves several flats, or in a lateral run under the road, and each of those is cleared differently and may have a different owner.
Drainage work is covered by Building Regulations Part H, which sets requirements for falls, access points and the materials used. In older buildings the pipework often pre-dates modern standards, so a repeat blockage can be a symptom of an offset joint rather than a one-off.
What Affects the Price of Drain Clearance
Method and Depth
Manual clearance of a single fixture costs least, jetting a household run costs more, and a camera survey is priced on top. Published London ranges for each are shown above, with inner London tending to sit higher.
Whose Drain It Is
If the blockage lies in a sewer Thames Water owns, the partner company tells you so rather than billing you to clear it. That candour can save a whole call-out fee.
When Drains Block in the Small Hours
A blocked toilet at 2am in a Brunswick Centre flat, or a gully overflowing outside a Camden Town basement after a night storm, cannot wait for a daytime diary. We answer at those hours, match a partner company that can reach you, and send you its name before it sets off.
What to Tell Us on the Phone
Tell us which fixtures are affected, whether the problem is on the ground floor or a basement, and whether neighbours have the same trouble. If several flats are affected, the blockage is almost certainly in a shared run, and that changes who should be called and who pays.
After the drain is clear, ask the partner company what it found and keep the written quote and invoice for your records, particularly if the cause was a shared pipe your landlord may need to deal with.
Frequently Asked Questions
How much does it cost to unblock a drain in King's Cross?
Published London guides put manual clearance at roughly £100 to £180 and high-pressure jetting at £180 to £350, with a blocked toilet around £100 to £200. A camera survey is an extra. These are indicative ranges rather than our quotes. The partner company gives you a written price once it has seen the problem, and does not begin clearing until you agree to it.
Is a blocked drain my responsibility or Thames Water's?
From the 2011 private sewer transfer, Thames Water owns the sewers that lie beyond a property boundary, while the pipe inside your own boundary is the owner's. A shared drain serving several houses is normally the water company's too. The partner company works out where the blockage sits and tells you honestly, so you do not pay to clear something that is not yours.
My flat is in a converted Georgian house. Who clears the shared stack?
A shared soil or waste stack usually belongs to the building, so the freeholder or managing agent is normally responsible. Your lease will set it out. The partner company can still attend an emergency, clear what is blocking your flat and tell you whether the cause is on the shared part, so you can pass it to the right person with the facts in hand.
Why does my drain back up after heavy rain?
When storm water fills the public sewer it can push back through low gullies, basement floor drains and ground-floor toilets. Camden names surface water and sewer surcharge as its main flood risk, and blames the August 2002 flooding on surcharged sewers. The partner can clear and check your side, but a full sewer should also be reported to Thames Water.
Rodding or jetting: which do I need?
Rodding pushes flexible rods through the pipe to break up a blockage and suits most simple obstructions. Jetting uses high-pressure water that also scours grease, scale and some roots from the pipe wall, which is why it costs more. The partner company chooses after seeing the blockage, and explains why in the written quote so you can compare the options.
Can tree roots block a drain in Bloomsbury?
Yes, and the mature planes and limes around the squares make it a realistic cause. Roots find the moisture at the joints of old clay pipes and grow into a mat that catches paper and fat. Jetting can cut them back, but only a CCTV survey shows whether the pipe is cracked, in which case a repair or lining is needed to stop it returning.
Do I need a CCTV drain survey?
Not for every blockage. It is worth having when a drain keeps blocking, when roots or collapse are suspected, or before you buy a property. Published London guides put a standard survey around £150 to £400, and £500 to £800 for complex jobs. The partner quotes it separately, so you can decide after the blockage is cleared.
Is it safe to use chemical drain cleaner first?
It is usually better not to. Strong chemicals can damage older pipes and traps, can burn skin and eyes, and make the next person who works on the blockage take extra precautions. They rarely shift a serious obstruction. Try a plunger, then call. If you have already poured something in, tell the partner company so it can wear the right protection.
What can I do to stop it happening again?
Keep fat and oil out of the sink, put wet wipes in the bin whatever the packet says, and fit a strainer over plugholes. Clear leaves from yard gullies in autumn. A drain that blocks again within weeks is telling you something, so ask for a camera survey rather than another clear-out. Persistent faults often point to a damaged pipe, not bad habits.
Do you cover Camden Town, Clerkenwell and Bloomsbury?
Yes. The line covers King's Cross, Bloomsbury, Clerkenwell, Camden Town, St Pancras and Euston, and we match the nearest suitable partner company. See our Camden Town and Clerkenwell pages for local drainage notes. Ring 07588 689186 and describe what the drain is doing, and we will take it from there. Callers from the Euston Road end and the Pentonville Road side are matched in exactly the same way.
Will jetting damage an old pipe?
Used correctly, it should not. The operator sets pressure and nozzle to suit the material, and old clay, pitch-fibre or cast iron needs more care than modern plastic. A camera check first shows weak spots. If the pipe looks fragile, the partner company should say so and offer both a gentler clear and a repair, with the price of each in writing.
What if the blockage has caused a leak or flooding indoors?
Stop using the fixtures, move belongings out of the way and photograph the water. Ring us and the partner company will clear the blockage first, because that is what is causing the flooding. If water has also come through a ceiling, a leak detection visit can help, and in a true emergency see emergency plumbing.
Blocked Toilet or Overflowing Drain? We Answer All Hours
Written quote first. Call 07588 689186.
07588 689186