FS Group engineer guiding a drain hose outside a brick terraced house

Blocked drains in North London

FS Group clears blocked drains across North London, from Islington and Camden to Tottenham, Finchley and Enfield. Toilets, sinks, outside gullies and manholes, day or night.

  • Available 24/7, 365 days
  • Prices from £55.00 + VAT
  • Rate agreed before we set off
  • 6-month guarantee

Family-run since 1998

On call day and night

Call 0800 689 3497

Homes, flats and businesses across North London call us when a drain blocks

Why FS Group

Blocked drain engineers for terraces, flats and suburban homes

Our engineers clear blocked drains across North London every day. They work from Kentish Town and Holloway to Wood Green, Southgate and Barnet. Most jobs are a toilet, a sink or an outside gully. Bigger blockages sit in a manhole or a pipe shared with the house next door. We find the blockage, clear it and test the flow. If the pipe itself is damaged, the camera shows you before anything else is booked.

Engineers on call 24/7Half-hour rate given firstCamera checks on handFixed-price quotes6-month guarantee, T&Cs applyFamily-run since 1998
Cheap drain unblockingFrom £55.00 + VAT

Weekdays from 8am to 6pm, a standard unblock is charged per half hour. Ring first and you learn the rate before an engineer leaves.

See all our rates

What customers say after a blocked drain

4.9
★★★★★
Google rating
★★★★★

Jordan did a fantastic job - we live in an old Victoria house with no apparent man hole. Jordan managed to unblock. Very professional. Highly recommend.

M
Mark
Blocked drain · Reviews.co.uk
★★★★★

Cleared a blockage in our external drain and Mitch was really efficient and helpful. And discovered another 6 houses were blocked down our street. Thank you so much for your help.

S
Sam H.
Outside drain · Reviews.co.uk
★★★★★

George of Fs was amazing - was more than equipped for clearing a blocked sink which is now back to normal; ridding us of the remaining sewage left as other neighbours in the building also reported a drainage issue. Mr Stewart

M
Mr Stewart
Blocked sink · Reviews.co.uk
★★★★★

A guy called Jordan came over an hour after I booked, really friendly and helpful. Worked quickly and efficiently to sort out a difficult blockage, with annoying old drains covered with concrete slabs. Kept me updated on progress and costs the whole time. Really solid service.

B
Ben
Difficult blockage · Reviews.co.uk
★★★★★

Cleared my blocked drain right through to the soil stack. He not only reconnected all the pipework I'd taken apart before I called him out but also tested for leaks before he left. I have no hestitation in recommending this firm to you.

A
Alan W.
Soil stack · Reviews.co.uk
★★★★★

Jordan visited our flat to unblock a very clogged kitchen sink which had been causing us problems for a week. He was professional, knowledgeable and fixed the issue quickly, giving us advice on how to prevent the same issue in future. 5 star service!

J
Joe H.
Kitchen sink · Reviews.co.uk

Where we work

Where we clear blocked drains in North London

The neighbourhoods we visit most for blocked drains, by borough, with their postcodes.

Islington and Camden

IslingtonN1HollowayN7Camden TownNW1Kentish TownNW5

Haringey

TottenhamN17Wood GreenN22Muswell HillN10Crouch EndN8

Barnet

FinchleyN3BarnetEN5

Enfield

EdmontonN9Enfield TownEN1SouthgateN14

Postcode not shown? Ring the help desk and they will check it for you.

More postcodes we cover

N1, N5, N7Islington, Highbury, HollowayNW1, NW5Camden Town, Kentish TownN8, N10Crouch End, Muswell HillN15, N17Seven Sisters, TottenhamN22Wood GreenN3, N12FinchleyEN4, EN5East Barnet, BarnetN9, N18EdmontonEN1, EN2Enfield TownN13, N14Palmers Green, Southgate

Drain ownership

Who looks after which drain

Pipe for your home
A pipe that serves only your home and sits inside your boundary is yours to unblock. Once it leaves your land or joins another pipe, it is not.
Shared with next door
Thames Water owns the sewers and most shared drains across North London. A blockage in one of those costs you nothing to clear.
Gullies in the street
Road gullies are the borough's job: Islington, Camden, Haringey, Barnet or Enfield Council. On red routes, TfL clears them.
FS Group engineer rodding a blocked drain through an open manholeN, NW1, NW5 and EN postcodes

Most blockages we clear here start in old clay pipes under Victorian terraces and their back yards.

Who we work for

Homes, landlords and businesses

Owners and renters

In a Tottenham terrace or a Southgate semi, the camera shows you the blockage when the cause is unclear.

Landlords and agents

Converted houses in Crouch End and Kentish Town often share one drain. We note which flat the blockage starts from, with photos for your records.

About CCTV surveys

Kitchens on Upper Street and Green Lanes

Restaurants and cafés can book drain clearing before opening or after closing. With a Priority Account, a business gets quicker attendance and contract rates.

About Priority Accounts

Blocked drains we clear in North London

Tell the help desk what is backing up and where. They send an engineer with the right kit for that job.

How it works

What happens after you ring

1

Tell us what is blocked

Phone 0800 689 3497 and say which drain is backing up. Or leave your number and we call back within 15 minutes.

2

Know the rate first

You are told the price per half hour on the phone, before anyone is sent to your address.

3

Cleared and guaranteed

When the drain runs freely, the engineer tests it. The work carries a six-month guarantee, T&Cs apply.

CHAS accredited contractorSafeContractor approvedWater Jetting Association member 2026Constructionline registered

What we see most

The drain problems we fix most often

Wipes and nappies

Wet wipes and nappies do not break down in water. They catch in the first bend and stop the toilet.

Old clay joints

Clay pipes under Victorian houses have mortar joints that crack. Waste catches on the lip and builds up.

Back-yard gullies

Many terraces drain the kitchen, the bath and the roof into one yard gully. Silt and grease settle there first.

Cooking fat

Fat poured down a sink sets hard in the cold pipe. Over months it narrows the drain to a trickle.

Leaves in outside gullies

Plane trees line many streets here. In autumn their leaves wash into open gullies and stop the water.

Flats on one stack

When the lowest flat in a converted house floods first, the blockage usually sits below it in the shared stack.

Blocked drain questions from North London

Which parts of North London do you cover?
All of it, from Islington and Camden to Haringey, Barnet and Enfield. The help desk confirms your postcode when you ring.
How do I know if the blockage is mine?
Lift the manhole cover nearest the house. If the chamber is empty, the blockage is between your home and that chamber, so it is usually yours. If it is full, the blockage may be in a shared drain, which Thames Water clears for free.
Can you unblock a drain if I cannot find a manhole?
Yes. Many older terraces have no manhole in the garden. We work in from the gully, the toilet or the soil stack, and a camera traces the run.
Will a chemical drain cleaner fix it?
Rarely. Most products shift a little soap or hair, but not wipes, fat or roots. Strong caustic cleaners can also harm old pipes.
What does unblocking a drain in North London cost?
Weekday visits between 8am and 6pm cost from £55.00 + VAT for each half hour. Most toilets, sinks and gullies clear within that time. Night, weekend and jetting rates differ, and you hear them before booking.
Can a blocked drain wait until the morning?
A slow sink can usually wait for a booked visit. Sewage rising in a manhole, or a toilet backing up into the bath, needs an engineer that night.
Will the blockage come back?
Not if the cause was waste, such as wipes or fat. If the camera shows a crack, a sag or roots, we explain the repair so it does not return.
Is the unblocking guaranteed?
Yes. Unblocking carries our six-month workmanship guarantee, T&Cs apply. If the same drain blocks again in that time for the same reason, ring us and we come back.

Blocked drain in North London?

Ring the help desk at any hour and an engineer is booked to you.