At SE Knotweed, the letter generator builds a plain, dated letter to a neighbour, council or landowner about encroaching knotweed, which puts the responsible party on notice and starts the evidence trail.
Choose a situation, fill in the details, and a dated letter is built below for you to copy or print. Nothing is sent from this page and nothing is stored. The letter is written to be clear and dated, which is what puts the other party on notice.
Fill in the details and select Generate the letter. Your letter will appear here, ready to copy or print.
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Simply having Japanese knotweed on your land is not against the law. Under the Wildlife and Countryside Act 1981 it is an offence to plant it or cause it to grow in the wild, but not to have a stand in your own garden. So a letter is not an accusation of a crime. It is a written, dated record.
Where knotweed spreads across a boundary, the relevant law is private nuisance. A neighbour can be responsible where they knew or ought to have known of the plant and failed to take reasonable steps to control it. Putting them on notice in writing matters, because that is often the point at which their duty begins. Courts have treated published RICS and Environment Agency guidance as fixing the moment a landowner ought to have known.
If a neighbour will not act, a council can serve a Community Protection Notice under the Anti-social Behaviour, Crime and Policing Act 2014 where the knotweed is having a detrimental effect on others. When you are selling, disclosure is handled through the TA6 property information form, and a treatment plan with an insurance-backed guarantee is what reassures a buyer and their lender. You can read more on our knotweed law and knotweed and mortgages pages.
This is a template, not legal advice. It gives you a clear, dated starting point. It does not replace advice from a solicitor on your own facts, and it does not guarantee any outcome. For a dispute, a sale or a claim, take legal advice and support the letter with a survey that records the species, the extent and the likely source.
A survey records the species, maps the stand and identifies the likely source, which is the evidence any letter, negotiation or claim rests on. We write the report so a solicitor can rely on it.