Biodiversity Net Gain Minor Medium Brownfield Development Outcome

Consultation outcome

Improving the implementation of biodiversity net gain for minor, medium and brownfield development

From: Department for Environment, Food & Rural Affairs Published 28 May 2025 Last updated 15 April 2026
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Applies to England

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This consultation has concluded

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Read the full outcome

Government response and summary of responses

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Biodiversity net gain (BNG) area-based exemption evidence annex

PDF, 222 KB, 11 pages

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Detail of outcome

We received 25,024 responses to this consultation. 23,748 of these were campaign responses received by email from Wildlife Trust (WT) and Royal Society for the Protection of Birds (RSPB) campaigns.

Defra will introduce secondary legislation in 2026 to start implementing the changes set out in the government response.

The current biodiversity net gain (BNG) requirement remains in place and developers should continue to follow existing guidance and legislation when delivering BNG.

Summary

We are seeking views on improving the implementation of biodiversity net gain (BNG) for minor, medium and brownfield development.

This consultation was held on another website.

This consultation ran from
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2 May 2025

to

11:59pm on 24 July 2025
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Consultation description

We want to know what you think about the implementation of biodiversity net gain (BNG) for minor, medium and brownfield development.

BNG is a way of creating and improving natural habitats. BNG makes sure development has a measurably positive impact (‘net gain’) on biodiversity, compared to what was there before development.

This consultation includes options around extending exemptions, simplifying the small sites metric and increasing ease of access to the off-site market. It also addresses specific challenges for brownfield developments.

The government is committed to encouraging economic growth through new development, while also supporting nature recovery. We think amending BNG to more efficiently embed nature-positive approaches within the planning system will help achieve this mission.

We are also consulting separately on BNG for nationally significant infrastructure projects.

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Updates to this page

Published 28 May 2025 Last updated 15 April 2026 show all updates
1.
15 April 2026

Added the summary of responses and government response, and an area-based exemption evidence annex.
2.
21 October 2025

We received a large number of responses to this consultation and are currently analysing the feedback. A full response will be published in due course.

Any changes made in response to the consultation will be communicated in advance of their implementation, with expected timescales. The current BNG requirement remains in place and developers should continue to follow existing guidance and legislation when delivering BNG.
3.
28 May 2025

First published.

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