Japanese Knotweed Excavation & Removal
When a herbicide programme is too slow for your build or sale, excavation removes the rhizome outright. We dig, screen, bury or cart away under a written remediation method statement — with a 10-year insurance-backed guarantee on completion.
Full Dig & Cart
Complete rhizome excavation and removal to a licensed landfill under EWC 20 02 01.
On-Site Burial Cell
Encapsulated burial at depth where site space allows — far cheaper than off-site disposal.
Root Barrier
Vertical and horizontal geomembrane barriers to protect boundaries and foundations.
Screening & Reuse
Mechanical soil screening to reduce volumes and retain reusable material on site.
Licensed Haulage
Sheeted, dedicated loads with consignment notes for every movement.
RMS & Guarantee
Remediation method statement for planning, plus a 10-year insurance-backed guarantee.
How the works run
- 1Survey & delineationWe map the stand and probe to establish rhizome extent, depth and proximity to structures.
- 2Remediation method statementA written RMS is produced for your local authority, lender or warranty provider.
- 3ExcavationRhizome-bearing soil is excavated under supervision, with clean and contaminated arisings kept separate.
- 4Disposal or encapsulationMaterial is buried in a lined cell, screened for reuse, or removed to a licensed landfill.
- 5Validation & guaranteePost-works validation, monitoring visits and issue of the insurance-backed guarantee.
Excavation vs herbicide — which do you need?
Herbicide treatment costs less and works well when you have two to three seasons and no groundworks planned. Excavation costs more up-front but clears the ground immediately, which is what a developer, a buyer in a chain or a lender under time pressure usually needs. Read our full comparison before deciding.
What knotweed excavation costs
On-site burial for a small domestic stand typically runs £4,000–£8,000. Dig-and-cart to a licensed landfill is usually £150–£250 per tonne once haulage and gate fees are included, which puts a modest garden stand around £8,000–£15,000. Root barrier installation alone commonly falls between £2,500 and £6,000. Every quote is fixed after survey.
Compliance & accreditation
Need knotweed gone before you build?
Send photographs and a location — we will survey, delineate the stand and quote a fixed excavation price.