How Much Does Drainage Work Cost in 2026?

You are responsible for the drains and pipes inside the boundary of your property, up to the point where they join a shared drain or the public sewer. Drains that are shared with neighbours (lateral drains) and the main sewers in the road are usually the responsibility of your local water and sewerage company, not you. If a blockage is in a shared or public section, contact your water company first because they will often clear it free of charge. Check the line of the pipe before you pay a private firm to dig.

A single blocked drain costs £80 to £250 to clear during normal working hours, including the callout. Most everyday blockages are cleared with drain rods or a hand auger at the lower end of that range. A stubborn blockage that needs high-pressure jetting costs £100 to £300. Out-of-hours and emergency callouts carry a premium, typically £150 to £400, so it is worth waiting until the morning if the blockage is not causing a flood.

A drain survey is not compulsory, but it is one of the most useful checks you can do before buying. A pre-purchase CCTV drain survey costs £100 to £350 and shows the real condition of the underground pipes, including cracks, root ingress, collapses, and misconnections. Drain repairs can run into thousands of pounds, so spending a few hundred up front can save you from inheriting a hidden bill or give you grounds to negotiate the price down. Surveyors recommend one for older properties and any home with large trees nearby.

Drain relining, sometimes called CIPP (cured-in-place pipe), is a no-dig way to repair a damaged drain. A resin-soaked liner is fed into the existing pipe and inflated, then left to cure into a hard new pipe inside the old one. It seals cracks, gaps at joints, and minor root damage without excavation. Relining costs £100 to £250 per metre, with a typical job coming to £1,500 to £4,000. It usually works out cheaper and less disruptive than digging up the drain, especially under a driveway, patio, or extension.

It depends on your policy. Standard buildings insurance often covers damage caused by a sudden problem such as a collapsed drain, and many insurers offer optional home emergency cover that pays for clearing a blocked drain. Gradual issues like root ingress or general wear and tear are usually excluded, and a simple blockage from fat or wet wipes is often treated as maintenance. Check your policy wording and call your insurer before you arrange the work, because they may have an approved contractor you have to use for the claim to be valid.

A standard CCTV drain survey costs £60 to £180 for a single property. A more detailed pre-purchase survey, which comes with a written report and a video for your solicitor or insurer, costs £100 to £350. The price depends on the length of pipework, how easy the drains are to access, and whether the survey is bundled with jetting or a blockage clearance. Many drainage firms put the survey cost towards the repair if you go on to have the work done with them.

The most common causes are fat, oil, and grease poured down the sink, wet wipes and sanitary products flushed down the toilet, and a build-up of leaves and silt in outside gullies. Underground, tree roots are the biggest culprit, working their way into pipe joints and slowly choking the flow. Older clay pipes can also crack, sag, or partly collapse with age, which traps debris and leads to repeat blockages. A CCTV survey is the only reliable way to tell a one-off blockage from an underlying pipe fault.

Relining is almost always cheaper and faster than excavating and replacing a drain, as long as the pipe is intact enough to take a liner. A relining job typically costs £1,500 to £4,000, while digging out and replacing a run of drain costs £1,000 to £5,000 or more once you factor in reinstating a driveway or patio over the top. Relining causes far less mess and disruption. Full excavation is only really needed when a pipe has collapsed completely or moved out of line.