Japanese Knotweed – Buyer Beware.

Japanese Knotweed is an invasive plant and was first discovered by Swedish naturalist Carl Peter Thunberg during the 18th century.  By the twentieth century it became apparent that Japanese Knotweed is an invasive plant and needs to be dealt with. There are different types of solutions for treating or eradicating Japanese Knotweed from herbicide treatment to excavation.

If a potential property buyer identifies Japanese Knotweed in the property then the implications could be serious. The invasive plant inflicts damage on brickwork and drainage systems and as a result, mortgage lenders may be reluctant to lend and the property insurers may not want to insure the property. Unfortunately all too often homeowners are oblivious to Japanese Knotweed until the time comes to sell their properties. Although the presence of  knotweed can be problematic, solutions are available.

When selling the property, the seller will need to fill in a form called a TA6 provided by the Solicitor and it is on this form that they declare whether the property is affected by Japanese Knotweed. The seller will need to be able to identify whether there is Japanese Knotweed or if they can’t, they should contact a Japanese Knotweed contractor that can help them identify it. This can simply be achieved by sending in a photo of the plant by email for identification by the contractor.

As for the buyer, it is equally important that they speak to their Solicitor and also contact a Japanese Knotweed contractor to help identify the plant. Once it has been identified, the seller should seek advice from a Japanese knotweed specialist company to discuss how best to put measures in place to treat the infestation and manage the problem. A specialist will be able to provide information on the following: site surveys, Knotweed Management Plan (KMP), herbicide treatment and monitoring program, excavations  and Insurance-Backed Guarantees (IBG).

 

Alex Evans

You May Also Enjoy

Breaking News

Housing Insight Report: June 2026

June’s housing market remained active, but buyers and renters continued to show caution. Buyer registrations dipped, while sales agreed remained broadly stable. In lettings, demand continued to outstrip supply, with nine applicants per available property. The average number of new prospective buyers registered per member branch dipped during June 2026, with an average of 55.…
Read More
Breaking News

Private rent and house prices, UK: August 2026

Main points Average UK monthly private rent increased by 3.7%, to £1,393, in the 12 months to July 2026 (provisional estimate); this annual growth rate is up from 3.3% in the 12 months to June 2026. Average rents increased to £1,451 (3.8%) in England, £843 (4.5%) in Wales, and £1,016 (1.7%) in Scotland, in the…
Read More
Breaking News

Scrapping Stamp Duty could unlock 300,000 extra home moves a year

Economic growth in key regions, such as around Cambridge and the ‘tech corridor’ being held back by stagnant housing market. Rathbones argues that a more mobile housing market could help unlock part of the UK’s £5.5 trillion housing wealth.   Reforming Britain’s property tax system could unlock more than 300,000 additional housing transactions each year…
Read More
new build home fronts
Breaking News

New-build property across Great Britain increased in price

The average house price for a new-build property across Great Britain increased to £501,658 in July 2026. The West Midlands recorded the largest average price increase, with the average new-build house price rising to £418,281 in July 2026. Yorkshire and Humberside recorded the smallest average increase, with the average house price rising to £347,846 in…
Read More
Breaking News

Where London leavers are paying a premium for green space

New research from UK Property Development (UKPD shows that Essex, Kent and Hertfordshire command the highest green space premiums among London’s commuter counties, with homebuyers paying a premium of up to 15.3% to live within a stone’s throw of public green space.   UKPD has compared the average asking price of properties for sale within…
Read More
Breaking News

Breaking Property News 18/8/26

Daily bite-sized proptech and property news in partnership with Proptech-X.   Removing inefficiency that comes from humans having to understand where every piece of information lives   Thought Leadership by Fredérick Wakim, Founder of ImmoAdmin “For most of the software era, making a property management platform better meant adding something to it. Another dashboard. Another…
Read More