Questions about Japanese knotweed

General Questions
Do I have a duty to disclose the presence of knotweed to a potential buyer?

The seller of a property has the legal obligation to disclose the presence of Knotweed on the land of the property. In fact, there is a specific question relating to the presence of knotweed on the Law Society TA6 forms. Failure to answer this question untruthfully during the conveyancing process could result in a claim of misrepresentation possibly being bought against you.

Japanese knotweed looks very similar to other plants – how do I know if I have knotweed on my property?

As the appearance of knotweed changes over the seasons, use our seasonal guide to help you identify whether you have knotweed on your property, you can find this here.

If you are still unsure, please fill out our online enquiry form, submitting a photo of the plant. We will get back to you as to whether you have a potential knotweed issue.

Is Japanese Knotweed poisonous?

Japanese knotweed is not poisonous – in fact it has been used in cooking recipes for many years!

Is Japanese Knotweed Illegal?

Whilst it is not illegal for Japanese knotweed to be on your land, Japanese Knotweed is controlled under a number of laws and legislations including:

  • Anti Social Behaviour legislation (Invasive Weeds)
  • Wildlife and Countryside Act 1980
  • The Environment Protection Act 1990
  • Hazardous Waste Regulations 2005
  • Waste Management Licencing Regulations 1994

By not aiming to control the prevention of spread to neighbouring land, or by moving contaminated soil or cuttings without disposing of it at a licenced landfill, the legislation could be enforced to control the spread. This can result in up to £5,000 fine or two years in prison!

Why is it so problematic?

In Britain, Japanese knotweed grows unabated and at its most prolific, it can grow up to 20cm in height in a day! With no known natural predator the roots can reach up to 3M deep and are able to break through concrete, tarmac and drainage systems, creating many damage issues for the foundations of your home and neighbouring properties. Due to its destructive nature, mortgage lenders are reluctant to lend on a property with knotweed, unless there is some form of treatment guarantee in place, which could result in your property being significantly down valued.

How do I know if I have Japanese Knotweed?

Japanese knotweed starts growing around early Spring and can reach up to 1.5-2M by May, 2.5- 3M by June, before dying back between September and November.

To identify Japanese knotweed, look for:

  • Red tinged shoots when it first breaks through the ground
  • Large heart or spade shaped leaves arranged in a zip-zag pattern around the stems
  • – Clusters of cream flowers towards the end of July that attract bees
  • Dies between September and November, leaving brown cane like stems

Our enquiry form allows you to send us a photo of your suspected knotweed. One of our dedicated advisors will contact you to let you know if you have a knotweed issue based on your photographic evidence.

How quickly can I get my guarantee?

Depending on the treatment and payment plan you opt for, guarantees can be issued on the same day as you pay for the treatment plan. In advance of any works been carried out.

Are your guarantees insurance backed?

Yes we can offer insurance backed guarantees (subject to fees). Guarantees are usually either 5 or 10 years and are fully mortgage compliant

Can my neighbour get a guarantee?

YES, any neighbour that has Knotweed present can have their own guarantee. This will be subject to them having their own treatment plan that would work alongside yours.

Are the guarantees transferable to new property owners?

Yes, all guarantees are fully transferable should you sell your property, subject to fees.

Survey/Report Questions
Is there a fee for a Survey Report?

The Knotweed Experts charge a flat fee of £299 plus VAT for undertaking a survey on your land, however unlike many Japanese Knotweed contractors, should you undertake a treatment service with us, the survey fee is deducted from the cost of the treatment plan report.

What happens after the Survey Report?

The Knotweed Experts will provide you with a full mortgage approved report, with scaled drawings of the land and areas of infestation.

This report will include an extensive report on our recommendations for treatment with clear, fixed fee costs and details of any on going management plan (where needed) and information on mortgage compliant guarantees.

We understand that identifying Japanese knotweed on your land can be a stressful time, so we ensure that our reports are delivered to you expeditiously and are written in a clear, jargon free format and we are always on hand to answer any further questions you may have.

What happens during the Survey Report?

One of our local experienced invasive weed surveyors will attend your property on your preferred date. A survey typically lasts approx. 1 hour to define your risk of Japanese Knotweed.

An invasive weed surveyor will take full measurements of your land, inspect the front and back gardens and all neighbouring boundaries and gardens for areas of infestation. (Where able)

Our experienced contractors will be able to answer any general questions that you may have and help put your mind at ease.

How do I book a Survey Report?

Follow the links to book a survey online, selecting your preferred date of inspection and giving as much information on the knotweed presence and access arrangements. One of our dedicated advisors will contact you to confirm your appointment. Alternatively you can call us on 0800 122 3310.

Treatment Methods
Are The Knotweed Experts Accredited Contractors?

The Knotweed Experts are PCA and Trustmark approved and all of our herbicide treatments are approved by the Environmental Agency. Our accreditations mean that our treatment is mortgage compliant and can be backed with a 5 or 10 year guarantee, giving you peace of mind that treatment is being undertaken by an experienced, accredited and professional contractor.

Are the chemicals used to treat Knotweed safe to use?

All of the herbicide treatments that we used are approved by the Environmental Agency and SEPA approved. However, treatment is bespoke to ensure that the surrounding plant and water systems are not affected by any treatments that we use.

When will the guarantee for treatment be in place?

Depending on the course of treatment required on your land, a guarantee could be in place from day 1 of your treatment plan.

What is the most quickest and effective form of treatment?

This depends on a number of factors, including where the knotweed is sited, how dense the knotweed is and whether there are any environmental impacts on the land and surrounding. The Knotweed Experts will take all of this information into consideration before devising a treatment package, which is bespoke to your land and area.

Call a Knotweed Expert Now!
0800 122 33 10
Book your survey today


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