M4 corridor (east)

Knotweed removal across Greater London.

All London boroughs

Boroughs along the Thames, the Lea Valley and disused rail land carry the worst knotweed loads in London. Garden boundaries backing onto these features are the most common survey trigger across N, E, SE, SW and W postcodes.

⟶ Local landing pages

Every London town we cover

Each link below opens a dedicated city landing page with hotspots, postcodes covered, lender notes and an FAQ tailored to that town.

• Greater London

  Knotweed in London

  London has the highest concentration of recorded Japanese knotweed sightings in the UK. The Thames, the Lea, the Wandle, the Brent and the d…

  Lead postcodes: W, SW, NW and SE and the surrounding area

⟶ Quick links

Jump straight to a London town

• Knotweed removal in London

Want a wider view? See every area we cover (40 cities & towns) or request a survey.

⟶ References

Sources and conditions

Statements about the law, waste handling, lender treatment and guarantees on this page are drawn from the sources below. Requirements change and individual lenders, insurers and local authorities apply their own criteria — check the current source before relying on any point.

• Japanese knotweed and residential property (Guidance Note, 2022)

  RICS

  The current valuation-and-management framework surveyors use. It replaced the 7-metre rule with an assessment of impact on amenity and on structures.

• Wildlife and Countryside Act 1981, section 14 and Schedule 9

  legislation.gov.uk

  Makes it an offence to plant or otherwise cause Japanese knotweed to grow in the wild. It is not an offence simply to have it on your land.

• Environmental Protection Act 1990, Part II — duty of care for controlled waste

  legislation.gov.uk

  Knotweed-contaminated soil and plant material is controlled waste; movement off site requires a registered carrier and a permitted receiving site.

• Anti-social Behaviour, Crime and Policing Act 2014, Part 4 — community protection notices

  legislation.gov.uk

  The route councils use where an owner's failure to control knotweed has a persistent detrimental effect on others' quality of life.

• Prevent Japanese knotweed from spreading

  GOV.UK / Environment Agency

  Official guidance on treatment, disposal and on-site burial requirements in England.

• Invasive non-native species guidance

  Natural Resources Wales

  The equivalent regulatory position for our Welsh sites, including waste and watercourse considerations.

• TA6 Property Information Form

  The Law Society

  The seller's disclosure question on Japanese knotweed, and the reason a management plan and guarantee are asked for at conveyancing.

• Invasive weed control — homeowner guidance

  Property Care Association (PCA)

  Industry code of practice for survey, management plans and insurance-backed guarantees.