About Us – Japanese Knotweed Expert

Japanese Knotweed Expert

At Japanese Knotweed Expert Limited we have been eradicating Japanese knotweed for over 20 years. As such, we have the experience to deal with any breakout of this invasive weed. We are so confident in our services that we offer 10-year company guarantees on all of the work that we carry out. We also provide 10 Year Insurance Backed Guarantee with all Management Plans that we implement.

We cover the entirety of the UK, assisting our clients in the treatment of Japanese knotweed and other invasive weeds. At our head office we have a dedicated team who are on hand to assist our clients with any queries. We are also happy to offer advice to property developers, builders, estate agents and architects.

Our Brand Promises


As a company, we pride ourselves on the service that we provide and offer our clients three key promises.


Complete Eradication by Japanese Knotweed ExpertProfessional service delivered with expert knowledge – Offering a ten-year company guarantee and a ten-year insurance backed guarantee means that we can guarantee the eradication of any Japanese knotweed on your property.

Fantastic Customer Service by Japanese Knotweed ExpertFantastic Customer Service – We provide our customers with the best experience possible, answering phone calls within 2 rings and answering your emails on the 24/7 basis. We are happy to offer any advice you may need and will work with you to find the best solution to your Japanese knotweed problem.

Bespoke Treatment Services by Japanese Knotweed ExpertIndividually Tailored Solutions – Every case of Japanese knotweed will be different. This can be due to the location of the site, the size or surrounding areas. We will work closely with you to put together an individually tailored treatment plan that will be most suited to your situation.

Honesty is an integral part of our company ethos…


Approximately 20% of our clients worry that they have Japanese knotweed and then it turns out to be something quite different. We offer free identification via email, this will give you peace of mind, without costing you any money. After identification we will complete a site visit to discuss your options with you, tailoring the treatment plan to your specific needs and requirements. If you require a survey completed on your property we can provide all necessary documentation that you will need to provide for a mortgage company for approval. Please click here if you would like to find out more.

As well as providing free online identification, we believe in upfront communication and costings. We will clearly outline all costings to you, prior to commencing your treatment plan, with no hidden fees.

What can we do for you?

Japanese Knotweed Expert is able to provide a variety of different treatment methods to suit each individual site and client. If you own a residential property, we would recommend and can implement a herbicide treatment. Alternatively, if you are a developer, we suggest a full excavation of the site to allow you to continue with your developments plans without delay.

Free IdentificationSend us a picture of the suspected plant and we will get back to you by email within 12 hours. If you have any questions regarding the identification, we are available via phone to answer any of your questions.

Japanese Knotweed Site Surveys – Our surveyor will visit your property to complete a site survey within 48 hours of your initial enquiry. We will then complete your detailed survey that can be used with a mortgage company, or for any legal requirements.

Japanese Knotweed Management Plan – Includes detailed descriptions of all of the treatment methods that we offer and the most suitable for your case of Japanese Knotweed. This also includes a treatment schedule with a breakdown of all costs involved.

10-year Company Guarantee – We offer a company guarantee which ensures that you are 100% happy with any work we complete.

10-year Insurance Backed Guarantee – Mortgage lenders require you to have a management plan in place which is covered by a 10-year insurance backed guarantee if a property is being sold or purchased. We include this in all of our Management plans as standard to ensure that you won’t be turned down for a mortgage.

What are our Qualifications & Accreditations?

Japanese Knotweed Expert is one of only a handful of companies in the UK that is a member of the PCA and has a fully qualified CSJK PCA surveyor – this is the qualification a mortgage company or local authority will need to see on any reports that are produced. We also have the necessary NPTC qualifications including:

  • PA1 –                    Pesticides Application Foundation Unit
  • PA6 –                   Hand Held Applicator
  • PA6AW –            Water Applicator


The ISO qualifications that we hold, ensure not only the correct processes are in place but also that we engage in the latest best practice methods.

  • ISO 9001 : 2015 certified –                               Quality Management System
  • ISO 14001 : 2015 certified –                             Environmental Management System
  • BS OHSAS 18001 : 2007 certified –               Occupational Health and Safety Systems


SSIP (Safety Schemes in Procurement) Accredited

  • Mutual recognition scheme for occupational health and safety standards.


Our staff also have a series of NVQs and diplomas including levels 1-3 in horticulture, making us more than qualified to deal with Japanese knotweed and any other invasive weed.



Japanese Knotweed Expert meets all the requirements of RICS (Royal Institution of Chartered Surveyors,) local authorities and mortgage lenders. Japanese Knotweed Expert Ltd is proudly represented by our parent company Planterra Ltd. The Planterra group provides a range of services within the land maintenance and development industry including landscape schemes and strategies, the removal of Japanese Knotweed and other invasive weeds and Part 35 Compliant Expert Witness reports. To find out more please click the link below…https://www.planterra.co.uk/