How much does it cost to unblock a drain?

A blocked drain rarely picks a good moment. The kitchen sink stops emptying on a Sunday, or the toilet rises when someone runs a bath upstairs, and the first question is how much this is going to cost. The honest answer is that most blockages cost less than people fear, and some cost you nothing at all, because the pipe is the water company's to clear. This guide gives you published 2026 prices for each method, explains who is responsible for which pipe, and shows you how to get a price you can hold someone to.

It is written for homes in England, with local detail for Birmingham and the wider West Midlands. Wales had the same 2011 sewer transfer; Scotland has different rules.

How much does it cost to unblock a drain?

There is no independent national survey of drain unblocking prices, so treat every figure as a guide. The clearest published breakdown we found is the 2026 UK price guide from Fantastic Services, a national home services firm that sells drain unblocking itself. Its figures include VAT:

The same guide puts a CCTV drain survey at about £90 to £200 on top, and says a blockage that needs digging out starts at around £600. It says a straightforward unblocking job typically comes to about £90 to £150.

No published survey gives a separate figure for Birmingham or the Black Country. The West Midlands normally sits below London prices, so the "rest of the UK" column is the fairer guide, but get a local quote rather than relying on any national range.

A worked example

This is our arithmetic on the figures above, not a quote. Say the outside drain by your back door blocks twice in a year. The first visit is rodded at £60 to £90. When it blocks again, the specialist rods it and runs a camera through to find out why, adding £90 to £200. That is £150 to £290 for the two visits, before any repair the survey turns up. Paying for the survey on the second visit is usually cheaper than paying for a third and fourth unblock.

What pushes the price up

• Where the blockage is. A sink trap is a quick job. A blockage deep in the main drain under the garden needs more time and heavier kit.
• The method. A plunger or hand auger is cheapest, rodding is in the middle, and jetting costs most because of the equipment.
• Access. A manhole cover you can lift is quick. A drain with no chamber, or one under a patio or extension, can mean digging.
• When you need it. Evening, weekend and bank holiday visits carry a premium over a booked weekday visit.
• Whether it keeps happening. A repeat blockage often points to a cause, such as tree roots, a cracked pipe or a build up of fat, and finding it adds a survey.

Who is responsible for a blocked drain?

This is the question to answer before you pay anyone, because it decides whether there is a bill at all.

Your drain: inside your boundary, serving only your home

Dudley Council puts it plainly: the owner or occupier of a house is solely responsible for maintaining a drain, clearing blockages and repairing faults within the property's boundary. If the pipe only takes waste from your home and the blockage is inside your boundary, you pay to clear it. If you rent, tell your landlord first.

The water company's pipes: shared sewers and drains outside your boundary

On 1 October 2011 the law changed. Sewers shared with neighbours, and lateral drains (the part of your drain that runs outside your boundary, for example under the pavement), passed to the water and sewerage companies. A Defra statement in 2010 said more than 200,000km of private sewers and lateral drains were due to transfer, and that owners were often surprised to learn these had been their responsibility.

In Birmingham, the Black Country and Coventry the sewerage company is Severn Trent. Dudley Council says that from 1 October 2011 all shared drains are Severn Trent's responsibility, and that a lateral outside the boundary is theirs right up to the main sewer. Coventry City Council says that if you are unsure whether a blockage is in a public or private pipe, Severn Trent should be able to tell you, on 0800 783 4444. It also warns that if the water company works on a pipe that turns out to be private, it will charge you.

Newer homes: check first

Walsall Council adds a detail that catches people out. If your home was built after 2011, you can be responsible for sewage pipes shared with another property inside your own boundary. If it was built before 2011, Severn Trent is. On a newer estate, check with Severn Trent before you assume the shared pipe is theirs.

Road gullies

The grates at the kerb that take rainwater off the road belong to the council as highway authority, not to you or the water company. Report a blocked road gully to your council.

How to tell where the blockage is

• One slow plughole usually means a blockage close to that sink, bath or shower. This is often a DIY job.
• Several plugholes, or the toilet and the shower backing up together, mean the blockage is further down, in the main drain.
• Lift the manhole cover nearest the house if you can do it safely, with gloves. If it is full and the next chamber down is empty, the blockage is between the two. If your chamber is empty but the house is still backing up, the problem may be past your boundary, which points to the water company.
• Your neighbours have the same problem. That strongly suggests a shared sewer. Report it to Severn Trent.

Can you unblock it yourself?

For a single slow plughole, often yes. A plunger, a hand drain snake, or taking off and cleaning the trap under the sink will clear many kitchen and bathroom blockages. In a Which? test of drain unblockers published in August 2026, the best shop bought products cleared hair and soap blockages and cost a few pounds. Which? notes that most are bleach based, so wear gloves and old clothes and follow the instructions.

Skip the internet hack. Which? tried bicarbonate of soda, salt and vinegar on hair and grease blockages, and it did nothing but fizz. Its scientific adviser explains that one is an acid and the other an alkali, so they cancel each other out.

Call a professional when several fixtures back up at once, the blockage is outside, it keeps coming back, or dirty water or sewage is coming into the home. If sewage is coming up inside, see what counts as a plumbing emergency.

How to get a fair price

Ask these questions when you ring round, and get the answers in a message or email:

• Is the price fixed for the job, or by the hour? If hourly, what is the minimum charge?
• Does the price include VAT and the call out?
• What happens, and what does it cost, if rodding does not clear it and the drain needs jetting?
• Do you charge if you cannot find a blockage, or if it turns out to be the water company's pipe?
• Will you show me the drain running freely before you leave?

Your rights help here. Under the Consumer Rights Act 2015, if no price was agreed beforehand you only have to pay a reasonable price. The work must also be done with reasonable care and skill, so a drain that blocks again the next day is worth raising with the business that cleared it. Check your home insurance too, as some policies and home emergency add-ons cover drains, and some only pay if you use their own contractor.

For more on how trades charge, see what a plumber charges per hour, and before anyone starts, how to check a tradesperson is genuine.

How to stop it happening again

• Bin the fat. Which? suggests pouring cooking fat into an old carton and putting it in the general waste. Fat sets hard in cold pipes, which is one reason drains block more in winter.
• Scrape plates into the food waste before washing up, and keep coffee grounds out of the sink.
• Use a drain guard or hair catcher in the shower and bath.
• Only flush toilet paper. Wet wipes, even ones labelled flushable, are a common cause of blocked drains and sewers.
• Keep outside gullies clear of leaves, especially after autumn storms. See gutter cleaning costs if downpipes are overflowing too.

Find a drainage specialist near you

If the blockage is yours to clear, post your job free with what is blocked, where, and whether more than one plughole is affected, and hear back from a local drainage specialist with a price. You pay the business directly, and nothing is taken online.

Or browse local businesses: blocked drains in Birmingham, Wolverhampton, Dudley, West Bromwich or Sutton Coldfield. For more guides on repairs and costs, see all our home advice.