Cost of Unblocking a Drain in the UK
Typical UK prices for clearing a blocked sink, toilet, outside drain or sewer, what affects the cost and when you should not pay for a repeat clear.
A blocked drain is rarely planned for, which is why it is easy to overpay in a hurry. Prices depend on where the blockage is, how it is cleared and who is responsible for that stretch of pipe. Knowing the typical ranges and the right questions puts you in a stronger position when someone gives you a figure over the phone.
Typical prices by type of blockage
These are rough guides for a standard visit in typical conditions. Regional variation is real, and London and the South East are usually higher.
| Blockage | Typical range |
|---|---|
| Kitchen sink or basin (hand tools or plunger) | Around £70 to £150 |
| Bath or shower waste | Around £70 to £150 |
| Toilet | Around £70 to £160 |
| Outside gully or yard drain | Around £80 to £180 |
| Main drain needing rods or jetting | Around £150 to £400 or more |
| CCTV survey to find the fault | Often an additional £100 to £300 |
Jetting and camera work cost more because of the equipment. A blockage that keeps returning usually points to a damaged or collapsed pipe, and repairs are priced separately.
Why prices vary
Where the blockage sits
A trap under the sink takes minutes to clear. A blockage deep in a shared sewer, or past a bend, needs more equipment and time.
Method used
Plungers, drain rods and augers are quick and cheap. High-pressure jetting is more thorough, especially for grease and scale, and costs more.
Time of call
Out-of-hours rates apply to evenings, weekends and bank holidays. For a slow drain rather than overflow, waiting for a weekday appointment often saves money.
Who is responsible
Drains within your property boundary are usually your responsibility. A shared drain serving several properties, or a public sewer beyond the boundary, may fall to the water company or a neighbour group. Check this before you pay for work that is not yours to fix.
Can you reduce the cost yourself?
For small jobs, yes. A plunger and a few minutes can clear a blocked basin. Our step-by-step guides to unblocking a kitchen sink and clearing a blocked toilet cover safe methods that do not risk damaging pipes. Avoid harsh drain chemicals if you are not sure what is in the pipe, as they can damage fittings and be hazardous to plumbers who then work on them.
Red flags when you are quoted a price
- A figure that rises sharply once they arrive with no explanation of what changed.
- Pressure to approve expensive jetting or excavation before any diagnosis.
- Reluctance to explain what they plan to do.
- A cash-only demand with no written breakdown.
A good plumber explains the cause, shows you what they found and says what they would do about it.
What to ask before agreeing
- Is the price fixed for the blockage clearance, or hourly?
- What happens if the first method does not work?
- Is a camera survey included or extra?
- If the blockage is beyond my boundary, will you tell me?
- Do you recommend repairs, and are they separate from clearing?
For wider cost context see how much a plumber costs. If the blockage is in a sink, our guide to unblocking a kitchen sink shows how to check the trap first.
Worked example: three households, three bills
A kitchen sink that will not drain. The trap is full of grease and food. A plumber clears it by hand in about half an hour. A typical outcome is a charge in the region of £70 to £130, with no equipment surcharge.
An outside gully that overflows when it rains. Leaves and silt have packed the gully trap and the pipe beyond it. Clearing with rods and a scoop, then flushing, might come to roughly £90 to £180.
A main drain that backs up into the downstairs toilet. Rods do not shift it, so jetting is used and a camera survey is suggested. You could see £200 to £400 for clearing and a further £100 to £300 for the survey. If the survey shows a cracked pipe, that is a separate repair quote.
These are broad, hedged figures. The same job can cost more in London and the South East.
Who pays: a quick guide to responsibility
| Where the blockage is | Usually responsible |
|---|---|
| Inside your home, up to the boundary | You, as owner or occupier |
| Pipe shared by several homes, beyond your boundary | Often the water company, though it varies |
| Under a rented flat or house | Landlord, unless tenant-caused |
| Public sewer in the road | The water company |
Check before paying for work that may not be yours to fund. Your water company can tell you who is responsible for a given stretch of pipe.
What a sensible visit looks like
- The plumber asks what has happened and which fixtures are affected.
- They check the nearest accessible point, such as a trap or inspection chamber.
- They tell you what they found before choosing a method.
- They clear the blockage and run water to confirm it flows.
- They explain the cause, so you can avoid it next time.
Avoiding repeat blockages
- Bin cooking fat instead of pouring it away.
- Use a sink strainer and a hair catcher in the shower.
- Only flush toilet paper, never wipes, even if the pack says flushable.
- Clear outside gullies of leaves each autumn.
Frequently asked questions
Is drain unblocking covered by home insurance?
It depends on your policy. Some buildings policies include drainage cover, others do not. Check your documents before paying, and ask the insurer before work begins.
Should I pay again if the drain blocks the next day?
If the blockage returns very quickly, ask the plumber why. It may indicate a deeper problem, and many plumbers will look again or explain what is needed.
How long does unblocking a drain take?
Simple sink or basin blockages are often done within an hour. Main drains needing rods or jetting may take a couple of hours, plus a survey if needed.