industry standards

Japanese Knotweed Ltd believe in operating to the highest of standards. As such, we have obtained a wide range of accreditations that ensure we are both accountable and up to date with the latest industry standards.

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Japanese Knotweed Ltd are members of the Property Care Association (PCA) Invasive Weed Group. This provides consumers with a means of identifying specialist contractors and consultants who can undertake invasive weed control services which can help control and eradicate Japanese knotweed and other invasive plant species. Accreditation to this scheme demonstrates our professionalism in the industry of invasive weed management, treatment and removal.



TrustMark is the Government Endorsed Quality Scheme covering work a consumer chooses to have carried out in or around their home.

When a consumer uses a TrustMark Registered Business, they know they are engaging an organisation that has been thoroughly vetted to meet required standards, and has made a considerable commitment to good customer service, technical competence and trading practices.

By ensuring all Registered Business adhere to and maintain these standards through our expert network of Scheme Providers TrustMark gives consumers increased confidence and choice. Additionally, in the event that a problem does arise, TrustMark offers a range of remedies to give further protection to consumers.


Japanese Knotweed Ltd are registered contractors to the SafeContractor, SSIP (Safety Schemes in Procurement) Health and Safety scheme. The SafeContractor scheme provides a health and safety audit service for contractors who want to reassure their clients that health and safety is being handled correctly and sufficiently on their sites.

Accreditation to this scheme demonstrates our proficiency to Public, Company, Employer and Employee Health and Safety.

CHAS (The Contractors Health and Safety Assessment Scheme)

Japanese Knotweed Ltd are registered contractors to the CHAS Government backed and SIPP Health and Safety scheme. Each month thousands of contractors and consultants (suppliers) apply for work with public and private sector organisations (buyers). To win work, they must meet the buyer’s health and safety standards.

Assessing suppliers health and safety competence is usually a lengthy and time consuming process. Suppliers can sometimes meet one buyer’s Health and Safety standards but not another. Being CHAS approved reduces duplication as suppliers compliance is accepted by all CHAS buyers.

CHAS assesses applicants:

  • Health and safety policy statement
  • Their organisation for health and safety
  • Their specific health and safety arrangements to a standard acceptable to our buyers and to others

Accreditation to this scheme demonstrates our proficiency to Public, Company, Employer and Employee Health and Safety.

Builder’s Profile

Japanese Knotweed Ltd is registered and approved suppliers on the Builder’s Profile Supply Chain Management Assessment Scheme used by companies such as Galliford Try and Willmott Dixon.

Builder’s Profile is the open-access Common Database service providing compliance and PQQ (pre-qualification questionnaire) information to the construction industry. Our secure Common Database enables subcontractors and suppliers to easily maintain and share information. For main contractors and clients it provides all the information, documents and tools required to manage a supply chain no matter how large or small.

RISQS (Railway Industry Supplier Qualification Scheme)

RISQS, formerly known as Achilles Link-up, has been developed to provide a service for the qualification of suppliers for all products and services that are procured by the industry. RISQS supports Network Rail, LUL/Transport for London, passenger, light rail and freight train operators, rolling stock organisations, main infrastructure contractors and other rail products and services providers in the management of supply chain risk. RISQS is an independent, third party qualification assessment of a supplier’s capability to supply products and services.


As a verified member of Constructionline, buyers will recognise that our company aligns to industry and government standards, and is ‘fit-to-supply’ to the construction industry. As ‘Gold Members’ we can demonstrate a ‘high professional standard’ to our clients. We are verified against an extended PQQ (covering Environmental Management, Equalities and Diversity, and Quality Management, and ensuring legislative compliance), and possess a valid SSIP certificate.

Acclaim Health & Safety

Acclaim Accreditation is the SSIP member scheme provided by Supplier Assessment Services Ltd. Acclaim used the expertise and knowledge of NEBOSH and SSIP assessor qualified professionals to verify our compliance with health and safety legislation.

Amenity Standard

The Amenity Standard is a quality management benchmark, to ensure that public spaces are maintained to the highest professional levels; seeking to keep all amenity areas safe and healthy for all to use.

Those amenity organisations that promote the logo show that they have a “licence to practice” and you can have confidence that work undertaken is to best practice standards and fully meet the legal requirements. This is vitally important, especially if you are having amenity work carried out in your home. For example, when a professional gardener helps maintain your grass or eliminate Japanese Knotweed. Ensuring they have the logo, allows you to have confidence that your property is being maintained using the highest standard methods.

SMAS Worksafe

An industry recognised approach to Health and Safety Certification. As one of the leading SSIP registered member schemes, the SMAS Worksafe Certificate is recognised nationwide by 000’s of organisations.

Supply Chain Sustainability School

The School is an award-winning industry-wide collaboration, led by their Partners and Members whose Vision for the School is to be “A world-class collaboration to enable a sustainable built environment”. The eight principles that guide this delivery are set out here and are delivered using four shared values:

  • Collaborative: We share knowledge and resources. Our direction is led by our partners and members
  • Progressive: We deliver measurable impact through dynamic leadership
  • Inspirational: We inspire our members and partners to drive positive change
  • Inclusive: We exemplify respect for the planet, our colleagues and wider society

Living Wage

The real Living Wage is the only UK wage rate that is voluntarily paid by almost 10,000 UK businesses who believe their staff deserve a wage that meets everyday needs – like the weekly shop or a surprise trip to the dentist.

Almost 300,000 employees have received a pay rise as a result of the Living Wage campaign and we enjoy cross-party support. There are a broad range of employers accredited with the Foundation including half of the FTSE 100 and big household names including Nationwide, Google, Brewdog, Everton FC and Chelsea FC.

Why choose us

  • Trusted by 1000’s of long-term satisfied customers with a 5-Star rating from over 1000 reviews on Trustpilot
  • Free Identification service to help you if you suspect that you have Japanese knotweed on your property
  • Fully CSJK accredited expert surveyors will visit your property to carry out the survey
  • We work to the PCA Code of Practice means we can provide you with an Insurance backed Guarantee
  • Detailed Management Plan that includes site plan map, RICS property risk category and photographs
A stem of Japanese knotweed leaves


Our friendly team can help with any suspected knotweed issues.