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Biodiversity Net Gain - Principles and Guidance for UK Construction and Developments

Biodiversity Net Gain is development that leaves biodiversity in a better state than before. In partnership with both CIRIA and IEMA, we are developing new guidance to help professionals and UK industry address this challenge and to achieve ‘Net Gain’ targets for biodiversity.


An important part of delivering good practice in Biodiversity Net Gain is to know what it looks like. Accordingly, a project group of professionals from each member organisation has worked to develop good practice principles to guide developers. The initial draft principles were refined following consultation with various stakeholders including government, NGOs and industry and also from testing through workshops and webinars with over 450 professionals. Our principles for achieving Biodiversity Net Gain are now published.


We continue to share the Principles with professionals, stakeholders and industry. Our ongoing objective to inform and develop good practice and we would welcome comments and feedback from stakeholders. Feedback on the Principles can be submitted to Sally Hayns

  • Thanks to the support of funding organisations, the project partners have now appointed authors to draft guidance to support delivery of net gain for biodiversity. Further information is available here


  • Watch our Biodiversity Net Gain Principles webinar for members of IEMA, CIEEM and CIRIA just click here.
  • This webinar was attended by over 450 professionals.  A document responding to questions submitted is also available here: