Biodiversity Net Gain Yorkshire: Understanding BNG

What is Biodiversity Net Gain?

Biodiversity Net Gain (BNG) refers to the process used by developers and local planning authorities to consider the environmental impact that the project may have in terms of biodiversity. It aims to ensure the biodiversity of the area is left in a better state than it was prior to completion of the project. Developers can achieve biodiversity net gain by mitigating biodiversity loss, retaining various habitat types and protecting any assets of strategic significance.

Due to relevant national legislation, Biodiversity Net Gain is soon to become mandatory in all parts of England, including Greater Yorkshire. Most local planning authorities are now requesting Biodiversity Net Gain to determine planning applications.

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Biodiversity Net Gain Yorkshire

In order to protect, grow and enhance the Greater Yorkshire area, the District Councils across Yorkshire are encouraging biodiversity net gain of 20 per cent following measures contained in their supplementary planning document (SPD).

The Environment Bill was passed this year as it received royal assent. Therefore, BNG will soon become mandatory through the forthcoming Environment Act in 2023. Under the Environment Act 2021, a development project must increase the biodiversity of an area by 10% or more. This means that Yorkshire Councils have doubled the BNG requirement for developments in the area by increasing the requirement to 20%.

The document states that Yorkshire is home to many European protected species, as well as sites of special scientific interest, and therefore legislation must protect them. Further information can be found on the Chartered Institute of Ecology and Environmental Management (CIEEM) website.

Implementing Biodiversity Net Gain, Yorkshire

If you are unsure of how mandatory biodiversity net gain may affect your planning application, you should contact Yorkshire local planning authorities. If they indicate that your development could be significantly impacted, we recommend that you contact an experienced ecologist as soon as possible to discuss whether your development plans meet the required standards as well as any measures you may need to take in order to meet the biodiversity standards.

At Collington Winter, our team has strong experience completing biodiversity net gain, Yorkshire, and will provide guidance throughout the planning process. We can ensure that one of our experienced biodiversity ecologists visits your development site to create and develop any necessary biodiversity net gain plans and any required BNG reports.

Our ecologists will complete a habitat classification assessment, and the data is entered into biodiversity units to measure changes to the natural environment, pre and post development. This metric is currently Defra Biodiversity Metric 3.0. Landscape planting plans and management plans are used to inform post development measures.

Contact us

Please get in touch if you would like further information about Biodiversity Net Gain plan requirements. We are happy to offer free CPD sessions on the Biodiversity Net Gain Principles and how we can help your schemes achieve this.

Our team of ecologists and landscape architects have helped numerous clients over the years. This includes matters regarding policy guidance for biodiversity gain in England. It is important to note that this varies across each Local Authority in the country.

If you would like to find out more about the services we provide, feel free to contact us using the details below.

Contact Us

Registered Address

23 Bark Street East 

1st Floor




Bolton Office: 01204 939 608

Dumfries Office: 01387 378208