Found knotweed, or worried you have? We identify it, make a clear plan and get rid of it, so you can protect your home and sell or mortgage with confidence.
Text or email a few clear photos of the plant, its stems and leaves. We'll tell you if it's knotweed and what to do next.
Japanese knotweed spreads underground through roots called rhizomes. A tiny piece can start a new plant, so cutting it back never solves the problem.
Sellers must declare it. Lenders usually want a professional management plan in place before they'll lend.
It pushes through weak paving, patios, drains and garden walls, and smothers other plants.
Letting it spread into the wild is an offence, and dug-out knotweed must go to a licensed site. Neighbours can take action if it spreads to them.
Photos: Katrin Schneider / korina.info (CC BY-SA 4.0); Alain Létrange (CC BY-SA 2.0 FR); Hugues Tinguy (CC BY-SA 2.0 FR); Krzysztof Ziarnek, Kenraiz (CC BY-SA 4.0). All via Wikimedia Commons, resized with watermark added.
There's no one-size-fits-all. We pick the method that fits your budget, your timescale and your plans for the land.
A tailored 5 year herbicide treatment plan to achieve complete eradication. Best value where the ground won't be dug up.
The fastest option. We excavate and remove Japanese knotweed rhizomes and contaminated soil, and dispose of it legally. Ideal before building work, extensions or landscaping.
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A tough membrane buried in the ground to stop knotweed spreading onto your property, or into third-party land.
We visit, confirm it's knotweed, measure the area and check how close it is to buildings and boundaries.
A clear written management plan and quote, which you can share with your solicitor, surveyor or lender.
We carry out the agreed herbicide plan, excavation or root barrier work.
Post-treatment monitoring visits to check for regrowth and deal with it straight away.
A 10 year insurance-backed guarantee once the work is complete.
A RICS and mortgage-compliant Japanese knotweed survey, including:
Cutting or digging out Japanese knotweed without specialist knowledge is not recommended.
When selling a property affected by Japanese knotweed, mortgage lenders may require evidence of professional treatment by an accredited contractor, together with a management plan and insurance-backed guarantee.
Japanese knotweed waste is classed as controlled waste and must be disposed of at a suitably licensed facility.
Excavation takes days. A tailored herbicide treatment plan runs over 5 years to achieve complete eradication.
Not usually. Lenders mainly want to see a professional management plan in place.
Landowners don't legally have to remove Japanese knotweed, but they must stop it spreading, and the courts have held that knotweed encroaching from neighbouring land can be a private nuisance. We can survey and record the extent, then, with your neighbour's agreement, remove or treat it on both properties in line with current legislation and guidance.
It depends on the size of the area and the method. Send us photos for a quick idea, then we'll survey and give you a fixed quote.
Further afield? Get in touch and find out if we can help.
Contact Chenviro today for a site survey and quote and we will provide you with a personalised management plan which best suits you.
