What is Biodiversity?
Biodiversity is the variety and variability of life on Earth. It is a form of natural capital that helps to create and maintain our eco-system services. Our biodiversity is in a fragile state and the UK is one of the most nature-depleted countries in the world. 56% of our species are in decline. It is important that the built environment does not cause the loss of biodiversity.
What is the Biodiversity Guide?
The Biodiversity Guide (updated 2023) explains how to deal with biodiversity within the planning process.
It gives advice on every aspect of biodiversity within planning. This includes:
- statutory protections,
- planning legislation,
- hedgerows,
- bat and bird boxes and
- survey requirements.
It explains how to secure net gain within the National Planning Policy Framework.
What is Biodiversity Net Gain?
Biodiversity Net Gain is an approach to development. It leaves the natural environment in a better state than beforehand.
It uses the ecological mitigation hierarchy with a biodiversity metric to measure the impact of development on biodiversity.
The Environment Act 2021 (legislation.gov.uk) makes a 10% Biodiversity Net Gain a mandatory requirement:
- 12 February 2024 for major development
- 2 April 2024 for all minor and other applicable application
Developments must achieve this net gain within 30 years. Cornwall Council is committed to environmental growth. The Council has required a 10% net gain for all major applications since 1st March 2020.
Cornwall Council is committed to environmental growth and has introduced Net Gain in advance of the Environment Bill 2019-2021. The Chief Planning Officer Note did require a 10% net gain for all major applications since 1st March 2020.
Biodiversity Net Gain uses the DEFRA Biodiversity Metric to measure biodiversity in units. This allows planners and developers to speak the same language and facilitates mutual understanding in how development impacts on the natural world. Cornwall was one of the first councils in the UK to adopt a Biodiversity Net Gain policy at a local level.
Key Information
- Biodiversity Net Gain Technical Guidance for Developers and Planners (In-depth guidance including Biodiversity Offsetting)
- Cornwall Planning for Biodiversity - updated 2023 (All aspects of all biodiversity in development.)
- Cornwall Council Planning Validation Guide (Submission requirements for Biodiversity Net Gain)
- DEFRA Biodiversity Metric Download User Guide and Metric Spreadsheet)
- CIEEM: Biodiversity Net Gain Report and Audit Templates (includes useful templates for Biodiversity Gain & monitoring reporting)
- BSI Standards BS 8683:2021 (Process standards)
- Planning Advisory Service (PAS) FAQ
Current Biodiversity Net Gain Planning Requirements
The BNG requirements are set out in the Cornwall Council Validation Guide. There is also a dedicated Biodiversity Net Gain (BNG) web page.
Requirements include:
- Demonstrate 10% Biodiversity Net Gain
- Submission of Biodiversity Gain Plan
- Submission of latest version of Biodiversity Metric (in an Excel format)
Key contacts:
- Ecology ecology@cornwall.gov.uk 0300 1234 202
- Local Plan localplan@cornwall.gov.uk 0300 1234 151