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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. CIRIA has recently published guidance on the topic in partnership with CIEEM and IEMA. The guidance consists of:

- Biodiversity Net Gain – Good practice principles for development (2016)
- CIRIA C776a Biodiversity Net Gain – A practical guide (2019)
- CIRIA C776b Biodiversity Net Gain – Case studies (2019)

Throughout 2016, CIRIA, CIEEM and IEMA collaborated to produce a set of Biodiversity Net Gain Principles. This involved extensive engagement and consultation with a range of stakeholders.  The next phase of this work is to produce practical and pragmatic guidance drawing on experience and evidence across the UK on how to implement these Principles.

Latest News
BNG consultation: following issue of the BNG principles and guidance,  CIRIA, CIEEM and IEMA are seeking feedback on the use and application principles.

A recording of a consultation webinar, held in September 2019 can be accessed here.

An additional online consultation survey is now available. Input from developers, planners, designers and contractors would be particularly valuable. 

Guidance on implementation of the Principles
Following issue of the principles, a guide has been produced aimed at the wide range of organisations that can influence, facilitate and deliver Biodiversity Net Gain.

The work was supported technically and financially by a range of organisations and CIRIA appointed a consortium to undertake the work. Led by Balfour Beatty, the consortium included Footprint Ecology, WSP, Natural England and Forest Trends.

The project also involved extensive consultation on this emerging, but fast-moving topic area. 

Both the principles and the guidance are available for FREE download here.
Click here for the content outline of the new guidance.
An errata notice is available here.
Please note by downloading the guidance documents you consent to your personal data being shared between the project partners CIEEM, IEMA and CIRIA. For detials of each organisation's privacy policy please follow the appropriate link below. 

CIRIA's privacy policy can be found here 
CIEEM 's privacy policy can be found here 
IEMA's privacy policy can be found here 

Full colour, printed copies may be purchased via IEMA's web site

Project Funders
Atkins, Barratt Developments plc, Berkeley Group, Carillion, Gatwick Airport, Kier, Land Securities, National Grid, Nestle, The Wildlife Trusts and WSP.

Author team
Led by Balfour Beatty, the consortium of authors and special advisors included Footprint Ecology, WSP, Natural England and Forest Trends.

Delivery Partners


Further information
For more information please contact Owen Jenkins at CIRIA.