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Drain Unblocker London
Professional drainage engineers attending a blocked drain in London

External Drain Unblocking in London

Clear blockages in external drains, gullies, and manholes serving London properties.

  • All 32 London boroughs covered
  • Drain unblocking, jetting and repairs
  • Specialists in Victorian clay drainage
  • CCTV drain surveys and reports
32 Boroughs covered
CCTV Drain surveys
Jetting High-pressure drain cleaning

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External Drain Unblocking across London

External drain unblocking covers the drains outside your property. That means gullies, soakaways, inspection chambers and the run to the public sewer boundary. Leaf build-up, roots from garden plants and street trees, and ground movement that shifts pipe joints all cause blockages here.

In dense London boroughs, the lateral drain may pass under neighbouring gardens or shared rear lanes. Finding the real blockage therefore means checking several access points, not one chamber. We clear external drains with high-pressure jetting and by hand at the inspection chambers.

We also check whether the pipe is private or part of the shared Thames Water sewer. Where the fault lies on the adopted side of the boundary, we can provide papers to support a claim for costs against Thames Water.

Roots are a common cause on streets with mature plane and lime trees. Jetting will not stop roots coming back through the same open joint, so we suggest a follow-up CCTV survey. A spot-relined section is usually the lasting fix, and we can quote that work from the survey footage.

We keep the work tidy. While we jet, we protect paths and gardens as far as we can. Afterwards, we run water from the house to prove the whole run is clear. Because you see the result for yourself, you can be sure the job is done.

Signs you need external drain unblocking help

  • ✓ External manhole cover surrounded by standing water
  • ✓ Water not clearing from the garden or driveway during rain
  • ✓ External gully overflowing
  • ✓ Outdoor drain cover emitting a bad smell
  • ✓ Multiple internal drains running slowly simultaneously

Our process

  1. 1. Locate all external inspection chambers and access points
  2. 2. Assess blockage location from the most accessible point
  3. 3. Clear the blockage by high-pressure jetting or manual rodding
  4. 4. Test all external drainage by running water from the house
  5. 5. Advise on any structural issues found during clearance

Pricing guide

Prices vary because every job differs. External drain unblocking depends on the job. A standard clearance costs less than a job with hard access, deep manholes or heavy jetting. Request a quote online, and we confirm the price with you before any work starts.

External Drain Unblocking — frequently asked questions

My external London drain keeps blocking with roots — what's the permanent solution?

Jetting clears the current blockage, but roots grow back in through the same open joint. The lasting fix is to reline that section. The new bore is smooth and root-resistant, so roots cannot get in. A CCTV survey shows which section needs relining.

Nearby locations

External Drain Unblocking in London External Drain Unblocking in Hackney External Drain Unblocking in Islington External Drain Unblocking in Camden External Drain Unblocking in Southwark External Drain Unblocking in Tower Hamlets External Drain Unblocking in Lambeth External Drain Unblocking in Wandsworth External Drain Unblocking in Hammersmith External Drain Unblocking in Kensington External Drain Unblocking in Westminster External Drain Unblocking in Lewisham External Drain Unblocking in Greenwich External Drain Unblocking in Bromley External Drain Unblocking in Croydon External Drain Unblocking in Barnet External Drain Unblocking in Enfield External Drain Unblocking in Haringey External Drain Unblocking in Ealing External Drain Unblocking in Brent External Drain Unblocking in Canary Wharf External Drain Unblocking in Fulham External Drain Unblocking in Central London External Drain Unblocking in Kingston upon Thames External Drain Unblocking in Edgware External Drain Unblocking in Battersea External Drain Unblocking in Catford External Drain Unblocking in Beckenham External Drain Unblocking in Sidcup External Drain Unblocking in Chislehurst

While you plan the work, read our guide How London Clay Soil Damages Your Drains (And What To Do About It). It covers what to check before you ask for a quote.

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