Skip to main content

Biodiversity Net Gain

From 12 February 2024,  major developments must achieve mandatory Biodiversity Net Gain (BNG) requirements.  This will apply to small sites from 2 April 2024.

Some developments are exempt from BNG - Biodiversity net gain: exempt developments - GOV.UK (

When you apply to the LPA for planning permission, you will need to confirm whether your development is exempt from BNG. If it is not exempt, you will need to attach a metric tool calculation showing the site’s biodiversity value before development. You should also provide information about how you intend to meet the BNG requirement, including details of proposed significant on-site enhancements.

After submission of the planning application, you may need a legal agreement and a Habitat Management and Monitoring Plan (HMMP). The terms of these will set out responsibilities for creation and enhancement and monitoring and reporting.

In the future when the registered ‘Responsible Bodies’ are in place in Kent a ‘Conservation Covenant’ may also be available.

A BNG plan is required after permission is granted.

Further information on BNG can be found using the following links:

Information you need for biodiversity net gain (BNG) Biodiversity net gain - GOV.UK (

We use cookies

Our website uses cookies to monitor the way you use it, helping to make your experience better. By continuing to use this site or clicking "accept cookies", you agree to our cookies. Cookie policy