bng

Biodiversity net gain becomes a legal requirement for major developments

21/03/2024

Insights

Planning updates to cause regulation upheaval

The first quarter of this year see changes to the planning system that will have implications for a range of development interests.

10% Biodiversity Net Gain (BNG) became a legal requirement for major developments from 12 February 2024. This requires major planning applications to provide a minimum of 10% net gain in biodiversity.

Major planning applications for dwellinghouses are defined as a development of 10 or more, or development on a site of 0.5 hectares or above where the number of dwellings is not known.

If a building or buildings create 1,000 sq m of floor space or more, or if the site has an area of 1 or more hectares (for example, commercial development), BNG requirements will also apply.

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Applicants who consider their proposals exempt from BNG will have to justify their position. Where BNG applies, applicants will need to include a completed biodiversity metric, a scaled plan showing the direction of north and onsite habitat, and an ecology or multiple ecology surveys.

Where 10% BNG cannot be achieved on the site, then addressing it outside the development site may be considered, and there is also an option to buy off-site biodiversity units on the market. As a last resort, applicants may need to purchase statutory credits from central government.

The exceptions to the rule

Biodiversity net gain requirements have a number of exemptions, including, for example:

  • Householder development
  • Self-build
  • Custom-build development of not more than 9 dwellings

From 2 April 2024, BNG requirements will roll out and be a requirement for non-major planning applications too, unless exempt or below a set threshold.

Further biodiversity net gain guidance is likely from central government as it rolls out in practice.

Kate Wood is a Director based in our Peterborough office. For more information on how BNG will affect you, contact her on kate.wood@eddisons.com or on 01733 556493.

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