🌿 Biodiversity Net Gain Calculator

DEFRA Metric 4.0 simplified assessment tool. Calculate biodiversity units for habitat baseline and enhancement, verify statutory 10% net gain compliance, and generate requirements checklist for planning applications.

Used for statutory requirement determination
Total development footprint
Multiplier applied to BU calculation

Calculating biodiversity units...

📜 Relevant Legislation

  • Environment Act 2021: Mandatory 10% BNG for major developments (Feb 2024) and minor (April 2024)
  • NPPF Paragraph 174: Biodiversity net gain requirement and priority habitats
  • DEFRA Biodiversity Metric 4.0: Official calculation methodology
  • Local Plan policies: May require higher BNG % or specific habitat types
  • Conservation Covenants: Available under Environment Act for long-term habitat protection
  • National BNG Register: All BNG schemes must be registered (www.register.biodiversityexchange.org.uk)
Ask Planning Agent