Mandatory Biodiversity Net Gain in England: Technical Guide

The aim of this document is to provide a simple ‘how to’ guide on England’s first phase of mandatory Biodiversity Net Gain (BNG).

It is primarily for CIEEM, IEMA and CIRIA members involved in BNG and is likely to also be useful for planners, developers, architects, engineers, landscape architects, local planning authorities and land managers.

Produced by: CIEEM, IEMA and CIRIA


  • Faye Durkin, Head of Nature, Greengage Environmental Ltd, on behalf of IEMA
  • Julia Baker, Technical Director, Nature Services, Mott McDonald on behalf of CIEEM
  • With contributions from Maria Hardy, Cressida Wheelwright and Nick White on behalf of Natural England