Japanese Knotweed Removal in South Wales
County-wide surveys, herbicide programmes and full excavation for homeowners, landlords, developers and public bodies across South Wales. Send photographs for free species confirmation; a professional on-site survey with a written report starts from £250 and is credited against the works if you proceed.
Fast site visits
Surveyors covering South Wales and neighbouring counties.
10-year guarantee
Insurance-backed and transferable on sale.
£10m liability cover
Licensed carrier disposal on every excavation.
Why knotweed spreads in South Wales
The South Wales valleys have the highest recorded knotweed density in the UK. Former colliery land, tips and railway routes gave the plant an unbroken corridor through the valleys, and terraced housing built tight against those slopes means most infestations here are shared between several owners.
Main local pressure: Ex-colliery land, valley railway routes and shared terraced boundaries.
Towns we cover in South Wales
Typical South Wales pricing
Herbicide programme
From £1,500
3–5 year treatment with monitoring and guarantee.
Hybrid excavation
From £4,000
Partial dig plus follow-up treatment.
Full excavation
From £8,000
Complete removal with licensed disposal.
Full breakdown in our cost guide, the excavation vs herbicide comparison and our contractor buyer’s guide.
Other counties we cover
Free photo identification in South Wales
Same-day species confirmation from your photographs. On-site professional surveys from £250.