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⚠️ Sewage backing up? Keep clear of the waste water — see Safety first ↓.
A rotten-egg smell can be a drain, or a gas leak: if unsure, leave and call the National Gas Emergency Service on 0800 111 999.
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Coverage: all of Haringey — N4, N6, N8, N10, N11, N15, N17 and N22, including Tottenham, Wood Green, Crouch End, Hornsey, Muswell Hill, Seven Sisters and Harringay.
What this covers: blocked sinks, basins, baths and showers; slow-draining or overflowing toilets; outside gullies and drains; recurring blockages and drain smells; and CCTV surveys to find the cause.
Not a blocked-drain job? If the toilet itself is the problem (weak flush, won’t fill) see Toilet Repairs; if sewage is flooding in now see Emergency Plumber; if it’s a leak rather than a blockage see Leak Detection; for a café, restaurant or shop see Commercial Plumbing.
Costs: a simple plunge or rod is very different from jetting or a camera survey — see what it costs ↓. Always confirm the price before work starts.
Jump to: What’s blocking it? · How it gets cleared · Whose drain is it? · Safety first · By district · What it costs · FAQs
What’s actually blocking your drain?
Most domestic blockages come down to a handful of culprits, and the cause decides the fix. Thames Water is blunt about it: drains are designed only for water, human waste and toilet paper — the “three Ps” — and the biggest offenders are fat, oil and food scraps that solidify in the pipe, plus wet wipes (even ones labelled “flushable”), nappies and sanitary items, which are its number-one cause of blockages.1 Hair and soap scum clog basins and showers; and in a hard-water borough like Haringey, limescale gradually narrows pipes too — Thames Water describes its water as hard, which leaves scale on everything it runs through.2 Older properties add two more: tree-root ingress into cracked joints, and collapsed or displaced sections in ageing clay drains — both better found with a camera than guessed at. Period-property owners: the Victorian Terrace Plumbing Guide covers old clay drainage; for scale, the London Hard Water Guide.
Before you call, a quick self-check tells you a lot. Thames Water says the blockage is likely inside your home if your neighbours have no problem, if your property doesn’t share a drain, if upstairs is affected but downstairs is fine, or if the outside drain access point is running clear.1 If several homes are affected at once, it’s more likely a shared sewer — which changes who fixes it.
How a blocked drain actually gets cleared
The right method depends on where the blockage is and what’s causing it — and matching the two is what separates a lasting fix from a job you’ll be paying for again next month.
- A plunger or hand auger (“drain snake”) handles most sink, basin and toilet blockages close to the trap — the cheapest fix, and often a DIY one.
- Drain rods push through a blockage in an underground run from an access point or inspection chamber — good for soft blockages and a partial clear.
- High-pressure water jetting scours the full bore of the pipe, cutting through fat, scale and compacted debris that rods only punch a hole in. It’s the usual choice for recurring or stubborn blockages.
- A CCTV drain survey sends a camera down to see the cause — essential when a drain blocks repeatedly, when you suspect roots or a collapse, or before you buy a property. It’s also what tells you whether the next step is a clean or a repair.
- Repair, when clearing isn’t enough: a cracked or root-damaged section can often be fixed without digging — a patch liner or cured-in-place lining is fed in and set hard inside the existing pipe — while a fully collapsed run may need excavation. A survey is what decides between them.
The practical takeaway: if a drain keeps blocking, paying for a third or fourth clear is usually false economy. A one-off survey finds the root cause so it can be fixed properly — and means you’re not guessing. To compare a drainage quote line by line, see How to Read a Plumbing Quote.
Whose drain is it in Haringey?
This is the question that decides who pays, and it’s worth getting right before anyone lifts a manhole cover.
A drain that sits within your boundary and serves only your property is yours to maintain — Thames Water is clear that property owners are responsible for the pipes inside the home and the ones connecting to its sewers, and that a blockage in your home is your responsibility to clear.1 Once a pipe is shared with neighbours or reaches the public sewer, it becomes Thames Water’s: Thames Water owns and maintains shared and public sewers, even where they run under your garden.3 A blocked drain in the road is different again — the London Borough of Haringey looks after highway gullies up to their connection with the Thames Water sewer, and notes it can serve notice giving an owner 48 hours to clear a blocked private drain.4
Two Haringey-specific wrinkles. First, after heavy rain a “blocked drain” may not be a blockage at all: the council investigated the July 2021 flooding under Section 19 across Wood Green, Hornsey/Crouch End and South Tottenham, where surface water and drainage capacity — not a single household pipe — were the issue.5 Second, who calls it in: if you’re a council tenant, use the council’s repairs route, which lists blocked drains among its urgent repairs;6 if you rent privately, the blocked drain is usually your landlord’s to fix, since the Landlord and Tenant Act 1985 requires landlords to keep the drains and sanitation installations (basins, sinks, baths and sanitary conveniences) in repair.7
Safety first
Blocked drains carry a few real hazards — handle them right before a plumber arrives.
- Sewage and standing waste water is a health risk. Don’t touch it with bare hands, keep children and pets away, ventilate the area, and clean and disinfect afterwards — wash hands thoroughly. If it’s flooding in, treat it as an emergency.
- Go easy on chemical drain cleaners. They’re caustic, give off fumes, can burn skin and eyes, and are at their most dangerous on a fully blocked pipe, where the chemical simply sits in standing water. Never mix products, and avoid them on older pipework they can damage — mechanical clearing (plunger, rods, jetting) is usually safer and more effective.
- A rotten-egg smell isn’t always the drain. A dried-out trap can let sewer gas back into the room (running water refills the trap), but that same smell can be a gas leak. If you’re unsure, or the smell is strong or near a gas appliance, treat it as gas: the National Gas Emergency Service says don’t touch electrical switches, naked flames or a mobile near the leak, open doors and windows if safe, turn the gas off at the meter only if you can reach it safely (not if it’s in a cellar), leave if the smell is strong or you feel unwell, and call 0800 111 999 from outside.8
- Digging near a gas pipe? If a drain excavation runs close to a gas service, only a Gas Safe registered engineer may work on the gas — never an unregistered person.9
- Renting? Report a blocked drain to your landlord — under the Landlord and Tenant Act 1985 it’s their duty to keep drains and sanitation in repair.7
Find a verified drainage plumber by district
What’s behind a blockage tends to vary with the housing across the borough.
West — Muswell Hill, Highgate, Crouch End, Hornsey, Fortis Green, Alexandra Park. Older houses here often drain through ageing clay pipes, where root ingress and cracked joints cause repeat blockages — a camera survey usually earns its keep. In wet weather, remember Hornsey/Crouch End was one of the areas the council investigated after the July 2021 flooding5 — a wet-weather backup may be surface-water drainage, not your pipe.
Centre — Wood Green, Turnpike Lane, Bounds Green, Bowes Park, Noel Park. Flats above shops and converted houses share waste stacks, so one flat’s blockage can back up into another, and clearing it may need access through the unit below. Wood Green was another of the three July-2021 flood-investigation areas.5
East — Tottenham, Bruce Grove, Seven Sisters, South Tottenham, West Green, St Ann’s. Along the High Road and the Green Lanes restaurant strip, kitchen fat and grease are a leading cause of shared-drain blockages — food premises need proper grease management (see Commercial Plumbing). South Tottenham was the third Section 19 flood-investigation area,5 and council tenants here use the council’s repairs route.6
North-east — Tottenham Hale, Northumberland Park, White Hart Lane, Broadwater Farm. Managed new-build blocks around Tottenham Hale drain through communal stacks, so a blockage is often reported via the managing agent rather than fixed flat-by-flat. On the Broadwater Farm estate, council tenants use the council repairs route.
South edge — Harringay/Green Lanes, Finsbury Park, Manor House, Stroud Green. Boundary-sensitive, so confirm you’re in Haringey if you’ll need the council route. The Green Lanes restaurant strip again means grease-heavy shared drainage behind the parades.
What drain unblocking costs
| Drainage job | Typical Haringey range (editorial estimate) |
|---|---|
| Clearing a blocked sink, basin or toilet | £90 – £200 |
| Rodding an external / underground drain | £120 – £280 |
| High-pressure water jetting | £180 – £400 |
| CCTV drain survey | £120 – £350 |
| Root cutting / recurring blockage clearance | £200 – £500+ |
Editorial estimate only — broad indicative ranges to sense-check a quote, not regulated rates, not market data and not a published cost survey. The real figure depends on the cause, the access and whether the pipe needs surveying or repair; always get a written quote.
One Haringey factor: all of the borough sits inside the London-wide Ultra Low Emission Zone,10 so a plumber in a non-compliant vehicle may pass on the daily charge (the Congestion Charge doesn’t reach Haringey).
Frequently asked questions
If the blockage is inside your boundary and serves only your property, it is usually your responsibility.
Thames Water owns shared and public sewers.
Thames Water says it is likely to be your pipe if neighbours are unaffected, your property does not share a drain, or upstairs is affected while downstairs drains fine.
If the problem is in a shared sewer or public sewer, report it to Thames Water.
The usual causes are fat, oil and food down the sink, and wet wipes or sanitary items down the toilet.
Thames Water names wipes as its number-one cause of blockages.
It asks people to flush only the three Ps: pee, poo and paper.
Everything else should go in the bin, not down the drain.
Be careful.
On a fully blocked pipe, the caustic chemical can sit in standing water.
That can give off fumes, risk burns and damage older pipework.
Never mix drain-cleaning products.
Mechanical clearing is usually safer.
If in doubt, get a plumber.
Often it is a dried-out trap letting sewer gas into the room.
Running water can refill the trap.
But the same rotten-egg smell can also be a gas leak.
If the smell is strong, persistent or near a gas appliance, treat it as gas.
Go outside and call the National Gas Emergency Service on 0800 111 999.
Usually your landlord.
The Landlord and Tenant Act 1985 requires landlords to keep drains and sanitation installations in repair.
Report the blockage to your landlord or managing agent.
Council tenants should use the council’s repairs route.
Recurring blockages usually point to a root cause.
Common causes include tree roots in an old clay drain, a partial collapse, a build-up of fat, or a shared stack that several homes feed.
Clearing the blockage may only solve the symptom.
A CCTV survey shows what is actually happening inside the pipe.
That lets the problem be fixed properly instead of just cleared again.
Areas we service in Haringey
We cover the whole borough. Towns and neighbourhoods wholly or mostly within Haringey include:
Alexandra Park, Bruce Grove, Crouch End, Fortis Green, Harringay, Harringay Green Lanes, Hermitage, Hornsey, Muswell Hill, Noel Park, Northumberland Park, Seven Sisters, South Tottenham, St Ann’s, Tottenham, Tottenham Green, Tottenham Hale, Turnpike Lane, West Green, White Hart Lane, Wood Green and Woodside.
We also cover the Haringey parts of Bounds Green, Bowes Park, Finsbury Park, Highgate, Manor House and Stroud Green, where the borough boundary runs through the area — so check your postcode if you’re near the edge.
Related services
- Toilet Repairs in Haringey
- Emergency Plumber in Haringey
- Leak Detection in Haringey
- Commercial Plumbing in Haringey
- Bathroom Plumbing in Haringey
- General Plumbing in Haringey
Related guides
- London Plumbing Costs & Compliance Guide
- How to Read a Plumbing Quote
- Victorian Terrace Plumbing Guide
- London Landlord Plumbing Compliance Checklist
A blocked drain is really two questions: what’s causing it, and whose pipe it is. Sort those — your boundary, a shared sewer, the road, or your landlord’s responsibility — and the right fix follows. For anything inside your own four walls, contact a verified Haringey drainage plumber below.
Contact verified drainage plumbers in Haringey ↑
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Last reviewed: May 2026 by Adiel Khan — SFEDI-accredited business advisor, 20+ years’ experience (South East Enterprise Ltd) and operator of VerifiedPlumbers. LinkedIn ↗
This page is checked for compliance and regulatory accuracy against the bodies and sources cited on it, including Thames Water, the London Borough of Haringey, the Landlord and Tenant Act 1985, the National Gas Emergency Service, Gas Safe Register and Transport for London. Source links are provided within this page where relevant.
Sources & further reading
- Thames Water — Blockages and blocked drains (causes; the “three Ps”; wipes as the number-one cause; in-home blockages are the owner’s responsibility; self-diagnosis signs) — https://www.thameswater.co.uk/help/water-and-waste-help/blockages
- Thames Water — Hard water (hard-water region; limescale) — https://www.thameswater.co.uk/help/water-and-waste-help/water-quality/hard-water
- Thames Water — Sewer pipe responsibility (shared and public sewers are Thames Water’s) — https://www.thameswater.co.uk/help/water-and-waste-help/sewer-flooding/sewer-pipe-responsibility
- London Borough of Haringey — Flooding, blocked gullies and drains (private-drain responsibility; 48-hour notice; highway-gully route to the Thames Water connection) — https://haringey.gov.uk/streets-roads-travel/road-maintenance-improvements/report-problems-with-a-street-road/flooding-blocked-gullies-drains
- London Borough of Haringey — Flood investigation reports & risk-management strategy (July 2021 Section 19; Wood Green, Hornsey/Crouch End, South Tottenham; surface-water flooding) — https://haringey.gov.uk/streets-roads-travel/road-maintenance-improvements/gullies-flooding/flood-investigation-reports-risk-management-strategy
- London Borough of Haringey — Repairs timescales (council tenants: blocked drains listed among urgent repairs) — https://haringey.gov.uk/housing/council-tenants/repairs/repairs-timescales
- Landlord and Tenant Act 1985, section 11 (landlord duty to keep drains and sanitation installations in repair) — https://www.legislation.gov.uk/ukpga/1985/70/section/11
- National Gas Emergency Service (what to do if you smell gas; 0800 111 999) — https://www.nationalgas.com/emergency-contacts
- Gas Safe Register (only a Gas Safe registered engineer may carry out gas work) — https://www.gassaferegister.co.uk/
- Transport for London — Ultra Low Emission Zone (London-wide ULEZ covers all of Haringey) — https://tfl.gov.uk/modes/driving/ultra-low-emission-zone