Overview
- Environet published updated regional counts in mid‑July that have driven local headlines by naming town and county hotspots using its live 'Exposed' verified‑sighting heatmap.
- The group estimates about 7% of UK homes — roughly 1.58 million properties — are affected, and the plant typically knocks around 5% off an affected home’s value, about £13,500 on average.
- Local hotspots cited in the new data include Watford, Reading, Worcester, Dorchester and Bolton, with county counts ranging from hundreds to thousands of verified sightings in recent months.
- Homeowners are being urged to check gardens, send photos for free ID and get professional surveys because lenders commonly demand a specialist management plan and a 10‑year insurance‑backed guarantee before approving mortgages.
- The plant was brought to Britain in the Victorian era, spreads when rhizome fragments in soil or materials move between sites, cannot set seed locally, and causes risks that include stalled sales, structural damage and neighbour disputes.