It’s believed that at least five percent of homes across the UK are affected by knotweed, knocking 10%, or £23,530, of the average UK property’s value. With 29 million homes across the nation, that’s 1,450,000 properties impacted with a huge £34.12bn wiped off in value.
The cost of dealing with knotweed is hefty and can run into tens of thousands of pounds for even a modest size garden, taking as long as five years to treat fully.
All the while, the average UK homeowner will see the value of their home slump by £23,530, this is, of course, higher in London (£47,546), the South East (£32,664), the East of England (£29,128) and the South West (£25,976).
With the highest house prices in the land, homeowners in Kensington and Chelsea stand to lose £119,162 on the price of their property if they find it has been infested with knotweed.
Westminster and Camden are the next largest price losses, facing a loss £93,860 and £86,280 respectively, while South Bucks is the home to the largest loss outside of London at £59,792, followed by Elmbridge (£59,673) and Chiltern (£54,617).
Tarquin Purdie, Founder, and CEO of HaMuch.com, commented: “Knotweed is a homeowner’s worst nightmare and there really is no DIY fix for this aggressive backyard vandal. It can take months on end to ensure it has been properly disposed of but can be more costly should you decide to turn a blind eye.
"The quicker you can get on top of the problem, the better, as a house with knotweed will not only drop in value but will also struggle to find a buyer.”
