Japanese Knotweed Removal in Devon
County-wide surveys, herbicide programmes and full excavation for homeowners, landlords, developers and public bodies across Devon. 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 Devon 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 Devon
Devon's steep river catchments move rhizome quickly during winter spate, and the county's long growing season extends the effective herbicide window later into autumn than most of the UK. Coastal and estuary plots need careful surveying before any dig is priced.
Main local pressure: Steep river catchments and a long southern growing season.
Towns we cover in Devon
Typical Devon 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 Devon
Same-day species confirmation from your photographs. On-site professional surveys from £250.