Overview
- Kevin Barzegar of Kaybridge Residential says problem plants have caused sales to collapse and wiped thousands off asking prices.
- Mortgage lenders frequently class properties with Japanese knotweed as high risk and may only lend once a professional, insurance‑backed plan is in place.
- Knotweed can grow up to 10 cm per day, and eradication typically takes years at a cost ranging from about £900 to £20,000 depending on severity.
- English ivy can penetrate mortar and trap moisture, bamboo’s spreading rhizomes can break paving and strain foundations, and willow roots can invade drains over large distances.
- Homeowners are urged to remove risky species early, while buyers are advised to check gardens carefully and commission specialist surveys if concerned.