Drain Unblocking Cost
£80–£250
typical UK range
Updated
Drain unblocking in the UK costs £80–£250 for standard internal blockages and £120–£400 for external drain jetting. Costs rise significantly for blockages caused by collapsed pipes, tree root intrusion, or blockages deep in the main drainage system.
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How much does each option cost?
| Type / scope | Typical cost | Notes |
|---|---|---|
| Simple internal blockage (sink, bath, shower drain)Manual or mechanical clearance of a blocked sink, bath, or shower drain — typically 30–60 minutes | £80–£180 | Manual or mechanical clearance of a blocked sink, bath, or shower drain — typically 30–60 minutes |
| Blocked toiletManual clearance or auger/drain rod; more physical but usually quick to resolve if the blockage is in the pan or local waste | £80–£180 | Manual clearance or auger/drain rod; more physical but usually quick to resolve if the blockage is in the pan or local waste |
| External drain jetting (domestic)High-pressure water jetting of external drains and inspection chamber — clears grease, silt, and partial root blockages | £120–£300 | High-pressure water jetting of external drains and inspection chamber — clears grease, silt, and partial root blockages |
| CCTV drain surveyCamera survey to locate the source of recurring blockages or suspected pipe damage; often recommended after repeated blockages | £150–£400 | Camera survey to locate the source of recurring blockages or suspected pipe damage; often recommended after repeated blockages |
| Tree root intrusion clearanceMechanical root cutting and jetting; may need to be combined with a CCTV survey to assess pipe condition | £300–£800 | Mechanical root cutting and jetting; may need to be combined with a CCTV survey to assess pipe condition |
| Collapsed or damaged pipe repairIf the drain survey reveals pipe collapse or significant damage; repair method (dig-and-replace vs CIPP lining) affects cost significantly | £500–£3,000 | If the drain survey reveals pipe collapse or significant damage; repair method (dig-and-replace vs CIPP lining) affects cost significantly |
| Emergency out-of-hours drain clearanceEmergency callout premium (50–100% above standard rates) for out-of-hours attendance | £200–£500 | Emergency callout premium (50–100% above standard rates) for out-of-hours attendance |
What affects the price?
- Blockage location — internal sink/toilet blockages are cheaper to clear than external main drain blockages
- Clearance method — manual rodding is cheapest; high-pressure jetting clears more thoroughly but requires specialist equipment (£150–£300 day rate for a jetting machine)
- Cause of blockage — fat and grease buildups are easily jetted; tree root intrusion or collapsed pipes require more complex interventions
- Depth and accessibility of the drain — shallow accessible inspection chambers are easy to work on; deep buried chambers or drains under structures cost more to access
- Whether a CCTV survey is needed — recurring blockages warrant a survey (£150–£400) to find the root cause
- Emergency vs planned — same-day emergency clearance costs 50–100% above standard rates
- Location — London and South East prices are 20–30% higher
What's included in the price?
- Assessment of the blockage and identification of the likely cause
- Mechanical clearance using rods, plunger, drain snake, or high-pressure jetting as appropriate
- Testing the drain flow after clearance
- Basic advice on preventing future blockages
- Reporting of any visible damage or potential issues in the drain system
How long does it take?
A simple internal blockage (sink, bath, shower) typically takes 30–60 minutes. External drain jetting takes 1–2 hours for a standard domestic property. A combined CCTV survey and jetting appointment takes 2–3 hours. Complex blockages involving tree roots or requiring significant investigation may take a full day. Emergency callouts are responded to as quickly as possible — many drain clearance specialists offer 1–2 hour response times.
Do I need one?
Drain blockages should be cleared promptly — a partially blocked drain becomes a fully blocked one over time, and sewage backup into the property is a significant health hazard and property damage risk. Slow-draining sinks and gurgling sounds in drains are early warning signs. For recurring blockages in the same location, a CCTV drain survey is strongly recommended to identify the underlying cause (partial collapse, root intrusion, or inappropriate items flushed). Note: you are responsible for drains within your property boundary; blockages in the public sewer (in the street) are the responsibility of your water company.
How do you avoid overpaying?
- For a simple internal blockage, try a plunger or a proprietary drain unblocker (Mr Muscle, Buster) before calling a plumber — this solves many simple blockages
- Get 2–3 quotes for non-emergency drain work — drain clearance prices vary significantly between specialists
- Book a CCTV survey alongside jetting rather than two separate visits — combined appointments cost less
- Ask about the drain guarantee — many drainage specialists offer a guarantee that the drain will flow freely for 30–90 days; if it reblocks within that period, they return at no charge
- Consider a drain maintenance plan if you have recurring problems — some specialists offer quarterly or annual jetting contracts at a fixed annual cost
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Frequently asked questions
We’re happy to answer all your questions.
How much does it cost to unblock a drain in the UK?
Unblocking a simple internal drain (sink, bath, toilet) costs £80–£180 in the UK. External drain jetting costs £120–£300 for a standard domestic property. Emergency out-of-hours drain clearance costs £200–£500. A CCTV drain survey to find the cause of recurring blockages costs £150–£400.
What is the fastest way to unblock a drain?
For a simple blockage, try a plunger first — this resolves many sink and toilet blockages in minutes. For stubborn blockages, a drain snake or drain rod kit (available from DIY stores for £20–£40) can reach further. If these don't work, call a plumber who can use a high-pressure water jet to clear the blockage quickly and thoroughly.
Who is responsible for a blocked drain?
You are responsible for drains within your property boundary. The public sewer (beyond your property boundary, typically in the street) is the responsibility of your local water company (Thames Water, Severn Trent, etc.) who must clear it free of charge. Call your water company if you suspect the blockage is in the main sewer rather than your private drainage.
What causes external drain blockages in the UK?
The most common causes of external drain blockages in UK properties are: fat, grease, and cooking oil buildup (the biggest cause by far); wet wipes and sanitary products flushed down toilets; tree root intrusion growing through pipe joints; and collapsed or misaligned pipes in older properties. High-pressure jetting clears fat and grease buildup effectively; root intrusion and pipe damage require more complex treatment.
Sources & References
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