Landlord Legal Duties
Landlord Responsibilities for Japanese Knotweed
Letting a property with untreated knotweed exposes you to criminal liability, civil claims and lost portfolio value. Here's what UK landlords must do.
ASB Act 2014
Up to £2,500 fines and Community Protection Notices for failing to control knotweed.
Civil Liability
Neighbours can sue for diminution in value — typical settlements £10,000–£40,000.
Mortgage Risk
Tenanted properties with knotweed become unsellable and unmortgageable.
Landlord Action Checklist
- ✓Commission a professional survey within 14 days of any report
- ✓Notify your insurer in writing
- ✓Begin a documented treatment plan
- ✓Provide tenants with written safety guidance
- ✓Retain all records for portfolio resale
Protect your portfolio
Free landlord survey with portfolio discounts available.
Frequently Asked Questions
Yes. Under the Anti-Social Behaviour, Crime and Policing Act 2014 and the Wildlife and Countryside Act 1981, landlords can face Community Protection Notices, fines up to £2,500 and even prosecution if knotweed spreads to neighbouring properties.
No — and they shouldn't. Glyphosate misuse and incorrect disposal can create criminal liability for the landlord. Always use a qualified contractor.
Some policies exclude knotweed-related claims. Engaging a contractor with insurance-backed guarantees protects your premium and your portfolio value.
Act within 14 days. Commission a survey, document everything, and begin a treatment plan. Inaction is the single biggest source of landlord prosecutions.