First Time Buyer Meets Japanese Knotweed

The Guardian recently published an article about a first time buyer encountering Japanese Knotweed on the property he is proposing to purchase.  The potential buyer discovered that the property has Japanese Knotweed only after making the offer. The article mentions that digging up knotweed is a thankless task.  Although digging up knotweed is not easy as the rhizomes can be up to 3 metres deep, if done correctly is very successful and often eradicates the weed and removes the problem.  Herbicide chemical control will manage the problem and stop the spreading but will not remove the knotweed contaminated soil.

The author states within the article that he should have asked his solicitor to find out if there were any issues around knotweed before making the offer. However, this question should have been on the TA6 form.  When looking to buy a property, always make sure you have read the Instructions to Buyers at the beginning of the Law Society Property Information Form (TA6).  On question 7.8 within the TA6 form, it states

“The seller should state whether the property is affected by Japanese Knotweed.  Japanese knotweed is a non-native invasive plant that can cause damage to property. Japanese knotweed requires several years of treatment before it can be eradicated. A Japanese knotweed management plan can help to control the spread of Japanese knotweed and eradicate it. Most management plans provide a record of works carried out to control Japanese knotweed. They can provide reassurance to mortgage lenders who may be concerned about the impact of Japanese knotweed on the value of the property. Sellers should provide a copy of any Japanese knotweed management plan to the buyer.”

Based on the above, it is the seller’s responsibility to declare whether Japanese Knotweed is present on the property.  It is not the responsibility of the buyer to check for knotweed when viewing the property. Rather, the best method is to get the garden surveyed by a knotweed specialist.  If knotweed is present then the current owner might have a Knotweed Management Plan (KMP) in place and this should be made available to the potential buyer.  The article noted that a survey has been carried out but the garden and grounds weren’t inspected. Instead of relying solely on the surveyor to identify knotweed, a specialist knotweed survey should be carried out in conjunction with the normal survey as this is aimed at identifying knotweed in many cases in the winter and providing the best remedial action.

Coming back to Herbicide Chemical Treatment it does control and eradicate the surface growth BUT does not remove the deep rooted rhizomes. Only excavation can do this. And chemical treatment can take 3 or 4 years to stop aerial growth appearing.  Removal by excavation is by far the most long term reliable remedial solution especially if the knotweed is close to buildings and landscaped areas. Only a specialist knotweed survey which costs £150 plus VAT from Japanese Knotweed Ltd will be able to advise whether chemical treatment or excavation is best.

If you find Japanese Knotweed in the property you wish to buy, this needn’t be too much of a problem as it only needs to be managed properly and professionally. The true damage and impact can be clearly assessed and if this is significant, the problem can be removed by excavation.  Structural damage caused by Japanese Knotweed is very rare and increased cost to extensions is common.

Judging things from the article, it is the lessees who should pursue the management company to manage the knotweed problem professionally and transparently.  The TA6 form would have asked the current owners to declare the presence of Japanese Knotweed and it is advisable to get a specialist knotweed survey done on the property to make sure no knotweed is present.

Japanese Knotweed Ltd is a PCA accredited company and the UK’s largest knotweed eradication company. For more information about a survey and treatment options email info@knotweed.co,uk or call 0333 2414 413.

Alex Evans

You May Also Enjoy

Breaking News

Modern rental properties command premium of 18%

New data analysis by FCC Paragon reveals that renters who want to enjoy the many benefits of living in a modern property are facing a rent price premium of up to 18%. Modern homes come with a number of benefits, including increased energy efficiency for lower household bills, less chance of experiencing frustrating maintenance issues,…
Read More
Estate Agent Talk

The Ultimate Guide to Selling Your Home: Smart Pricing, Stylish Upgrades, and Strategic Marketing

Selling a home is more than listing it online and waiting for offers—it’s about crafting a compelling narrative that captures buyers’ interest and motivates them to act. From pricing strategies to final staging touches, this article breaks down advanced, actionable tactics that help homes sell faster and for a higher price. Let’s explore how you…
Read More
Breaking News

Prime London property values slide by as much as 60%

The latest market analysis by prime London property brokerage, Jefferies London, has revealed that sold prices across some of prime London’s most popular neighbourhoods have fallen by as much as 60% so far this year when compared to the same period in 2024. Jefferies London analysed sold price records from the Land Registry, looking at…
Read More
Breaking News

Can’t afford London? These cities are giving investors more for less

New data has revealed that between four and ten of all buy-to-let purchases made in the first four months of 2025 took place in the Midlands and the North of England. With affordability scarcer than ever in the South, property investors are turning their attention to greener pastures… literally. So, what’s driving the shift up…
Read More
Breaking News

£19m per month for the nation’s most prestigious property

The latest research by award winning mortgage adviser, Alexander Hall, has revealed that whilst a property close to Royal Ascot will see the average homebuyer pay £4,263 a month in mortgage costs, this monthly payment climbs as high as £19m a month for those with ambitions of snagging a real royal property. This week, Royal…
Read More
Breaking News

Glenigan Summer Forecast: Boom Times Ahead For UK Construction

Construction intelligence specialists predict major performance uptick over the next three years. UK construction sector set to grow 24% over the forecast period Private housebuilding is set to increase significantly, with an 18% activity increase predicted in 2027 Industrial & Commercial gradually strengthens as UK economic growth gathers pace, supported by increased business investment Increased…
Read More