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Drain unblocking cost estimator

UK drain unblocking typically costs around £80 to £180 for a simple internal blockage cleared with rods, and £150 to £500 or more when high-pressure jetting, a CCTV survey or excavation is needed, based on published trade price guides. If the blockage is in a shared or public sewer, the water company usually clears it free, so it may not be your bill at all.

Answer the questions below for an indicative range, and to check whether it is even your responsibility. It is arithmetic on published UK trade ranges, not a quote. The result will point you to who actually owns the pipe before you pay anyone.

Your situation

1. Where is the blockage?

Inside the property (a sink, toilet or bath) A slow or blocked fixture. Usually your responsibility, often the cheapest to clear. Outside, in a drain serving only your home A gully or chamber on your property, before the boundary. Normally yours. A shared or public sewer (serves more than one home, or in the road) Often the water company s responsibility, possibly free. Check before paying.

How this estimate is worked out (methodology)

The tool first checks responsibility: a shared or public sewer is usually the water company s job, so it pauses the costing and tells you to confirm ownership before paying. For your own drains it holds a published range per method and shows the arithmetic.

Location sets ownership and whether a charge should fall to you at all.
Method sets the range: rods are cheapest, then jetting, CCTV and excavation in turn.

Ranges are the public Checkatrade drain unblocking cost guide (accessed June 2026). Responsibility follows Water UK guidance on who owns which pipe. No figure is invented.

What moves the price

Whose pipe it is: a shared or public sewer may cost you nothing.
Method: rodding is cheapest, jetting and CCTV cost more, excavation most.
Whether a collapse or root ingress is found and needs repair.
Call-out timing: emergency or out-of-hours visits carry a premium.

Frequently asked questions

When is a blocked drain not my bill?

If the blockage is in a shared sewer (a pipe serving more than one property) or the public sewer in the road, it is usually the water company s responsibility to clear, at no charge to you. Only the drains that serve your property alone, up to the boundary, are normally yours. Check who owns the pipe before you pay anyone, because some firms will clear a public sewer and bill you for it.

Why is a simple rod-and-clear so much cheaper than a survey?

A straightforward internal blockage cleared with rods or a plunger is often a short call-out. A CCTV survey, high-pressure jetting or a collapsed-pipe repair involves specialist kit or excavation, which is why those jobs sit much higher in the range.

Can I clear it myself?

Often yes, for a slow sink or a gully outside, with a plunger, drain rods or removing visible debris from an external chamber. Avoid strong chemical drain cleaners where you can, as they can damage older pipes and are a health hazard. If the blockage is below ground, recurring, or you suspect a collapse, get a professional.

Sources

Oliver Mackman

Editor, HomesAndHedge

Oliver Mackman is the editor of HomesAndHedge and is accountable for its editorial standards and sourcing. He ensures every claim is backed by a named source such as the Property Care Association, the RHS, the NHS or gov.uk, and that the site is clear about when a job needs a qualified professional.

Last reviewed: 12 June 2026