TEL: 01327 703129
(Head Office)

TEL : 01962 886060
(Southern Regional Office)


Developers and Commercial Premises

The Knotweed Company offers a full range of services geared to construction sites and commercial premises. We have had experience of working on construction sites since 2004 and tailor our works to our client’s requirements and needs.


The Knotweed Company is one of the most experienced and competent contractors working with invasive weeds. Our professional team began working exclusively with invasives, such as Japanese knotweed, in 2004 and since then has successfully completed numerous excavations, herbicide programmes, cell burials, bunds, root barrier installations and a variety of combined solutions. We have experience of both small and large projects and operate throughout England and Wales, as well as the Channel Islands (and elsewhere if requested). Health and Safety is a key factor in our work. We operate to the highest standards and are always looking to improve.

Our operational staff hold appropriate qualifications, such as SSSTS or SMSTS, as well as CSCS cards. All operational staff hold the appropriate certificates to apply herbicides (NPTC PA1, PA6AW as a minimum) as well as holding the appropriate qualifications for Japanese knotweed, such as the PCA’s CSJK (Certificated Surveyor in Japanese knotweed) or the QTJK (Qualified Technician in Japanese knotweed). We assisted the PCA in the setting up of the Invasive Weeds Control Group and have greatly contributed to both the creation and running of the examination systems for both knotweed Surveyors and Technicians.

As well as being a full contracting member of the PCA, we are accredited with Constructionline (Gold), CHAS, Safecontractor and Builders Profile.

The Knotweed Company were awarded the PCA Project of the Year in 2018 for innovative thinking that enabled an important construction project to proceed despite a substantial Japanese knotweed presence and a history of previous site disturbance. Click here for the case study.


We cover all of England and Wales, as well as the Channel Islands, and can offer:

  • Knotweed Management Plans
  • Invasive weed surveys
  • Free quotations
  • Consultancy services
  • Watching brief
  • Full excavation and muckaway contract works
  • Cell burials
  • Bund/Stockpile creations
  • Root barrier installations
  • Screening works
  • Herbicide treatment programmes
  • Extended warranties and Insurance-Backed Guarantees

Our clients include:


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Our many previous clients include Allenbuild, Balfour Beatty, Bellcross Homes, Greater London Demolition, JSL (Trevenson), Kier, Lodge Park, Morris Homes, Newland Construction and Taylor-Wimpey.

For more case studies please click here.

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