Biodiversity Net Gain

Sustainable development sits high on the political agenda which makes improving biodiversity a key driver for developers, land owners and local planning authorities alike.

Biodiversity Net Gain (BNG) is an approach used to improve a sites biodiversity value. Once applied, on completion, a site will have a positive ecological impact, delivering improvements through habitat creation or enhancement after avoiding or mitigating harm.

What is Biodiversity Net Gain?

Biodiversity Net Gain (BNG) sits within the Environment Act. 

The Act requires all development schemes in England to deliver a mandatory 10% biodiversity net gain to be maintained for a period of at least 30 years. The concept seeks measurable improvements for biodiversity by creating or enhancing habitats in association with development. Development proposals must “leave biodiversity in a better state than before”.


What does Biodiversity Net Gain mean for developers and land owners?

BNG means developers and land owners in England must ensure their projects deliver biodiversity improvements to meet the required 10% increase.

They must determine and evidence a project’s final BNG value using the specified Defra biodiversity metric if they want their plans to move through the planning process swiftly.


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How to achieve Biodiversity Net Gain

To achieve biodiversity net gain, proposals must follow the ‘mitigation hierarchy’ which compels planning applicants to avoid harm in the first instance, then mitigate or finally compensate for losses on-site, off-site or through a combination of the two solutions. These measures will be required in planning conditions.




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Free Biodiversity Net Gain CPD sessions for your business

BNG is a complex matter and, at first glance, can seem daunting. To help you and your team understand BNG and how to deliver it, we can provide an informative CPD webinar covering everything you and your team need to know about BNG and its mechanisms for delivery. 

To find out more about our online webinar, get in touch using the form below.

Free webinar: How to approach Biodiversity Net Gain

Biodiversity Net Gain is now becoming mandatory on all development projects in England which means any development proposal needs to demonstrate how it will improve biodiversity and how this will be maintained for at least 30 years.

The implications for developers and land owners is huge and failing to deliver BNG could be a costly mistake. In this webinar, delivered in November 2020, Mike Barker, Director of Ecology, demonstrates how to integrate biodiversity net gain into development plans, avoid costly mistakes and effectively and legally manage a site to achieve maximum value.

Use the form below to watch our webinar now.

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Related Insights

Key contacts


Mike Barker

Director of Ecology T: +44 (0)1480 466335 Email
Cambridge | UK

Dr Simon Zisman

Senior Director, Ecology T: +44 (0) 131 555 5011 Email

James Mccrory

Senior Associate – Ecology T: +44 (0) 28 9066 7914 Email
Belfast | UK
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Joanne Wilson

Associate Director T: 029 2066 8662 Email
Cardiff - Callaghan Square | UK

Nick Betson

Technical Director T: +44 (0) 23 8081 0440 Email
Southampton | UK

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