Valuing Properties with Japanese Knotweed in 2026: RICS Guidance for Mortgage Lender Challenges

Japanese knotweed now affects approximately 5% of UK properties, costing homeowners an estimated £1.25 billion annually in treatment costs and property devaluation. This invasive species has transformed from a Victorian ornamental plant into one of the most significant challenges facing property valuers, mortgage lenders, and homeowners in 2026. Understanding Valuing Properties with Japanese Knotweed in […]




