Biodiversity Net Gain London: Achieving BNG

Biodiversity net gain London

Biodiversity net gain is an approach to development whereby developers consider the environmental impact a development project will have in terms of biodiversity. It aims to ensure the biodiversity is left in a better state than before the development was completed. This is done by avoiding loss of biodiversity and retaining natural habitats and ecological features.

Biodiversity Net Gain (BNG) is being requested more frequently to inform planning applications. The aim is to demonstrate how the development proposal will be of benefit to biodiversity in a measurable manner and align with local plans.

Following the passing of the Environment Bill, mandatory biodiversity gain plans for developments in England will be introduced through the forthcoming Environment Act in 2023. Following this any development will be halted if it fails to meet the requirements. However, BNG is already required by the National Planning Policy Framework.

biodiversity net gain cambridge

Biodiversity Net Gain aims


Biodiversity Net Gain (BNG) is a policy in the UK aimed at ensuring that new developments have a positive impact on biodiversity. The main aims of Biodiversity Net Gain in the UK are:

  • Enhancing biodiversity: BNG aims to leave the natural environment in a measurably better state than it was before a development takes place. This is achieved by ensuring that the biodiversity value of a site after development is higher than it was before. In cases where a development affects biodiversity, developers must ensure the provision of additional suitable natural habitats and ecological features, surpassing the impacted area by at least 10% compared to the initial baseline.
  • No net loss: BNG aims to ensure that there is no net loss of biodiversity as a result of development activities. This means that any loss of biodiversity due to construction or other development activities should be compensated for elsewhere.
  • Improving ecosystem services: BNG seeks to enhance the provision of ecosystem services, such as pollination, water purification, and climate regulation, which are crucial for human well-being.
  • Habitat creation and restoration: BNG encourages the creation and restoration of habitats, including wetlands, woodlands, grasslands, and other ecosystems that support a diverse range of species.
  • Sustainable development: Biodiversity Net Gain aims to integrate biodiversity conservation with economic development. It emphasises the importance of sustainable land use planning and construction practices.
  • Compliance with legal requirements: BNG aligns with existing legal requirements related to biodiversity conservation in the UK, including the Wildlife and Countryside Act and the Conservation of Habitats and Species Regulations. The Environment Act 2021 will make BNG a legal planning requirement from November 2023.

Biodiversity metric

The biodiversity metric serves as a tool to gauge how a development or alteration in land management will impact the biodiversity value of a site. This includes activities like constructing houses, establishing woodlands, or cultivating wildflower meadows.

This metric enables you to:

  • Evaluate the biodiversity unit worth of a specific land area.
  • Provide a consistent means of showcasing biodiversity gains or losses.
  • Quantify and acknowledge direct effects on biodiversity.
  • Compare different proposals for a site, whether they involve on-site or off-site habitat creation or enhancement.

It aids in the process of designing, planning, and making informed land management decisions that prioritise biodiversity. The metric computes values in terms of ‘biodiversity units’, which are determined by considering factors like habitat size, quality, and location.

Our team of ecologists and landscape architects have helped numerous clients over the years. Our clients have ranged from minor developments to major applications. If you would like to find out more about the services we provide, feel free to contact us using the details below.

Biodiversity credits

Most local planning authorities will want developers to demonstrate biodiversity net gain on the development site. In some circumstances, this cannot be achieved, and it is simply not possible. However, this does not mean that the local planning authorities will automatically refuse a planning application.

Instead, the local planning authority may grant planning consent if developers are able to deliver sufficient biodiversity net gain using offsite biodiversity habitat enhancement.

Developers may be given the option of purchasing biodiversity credits through funding schemes that will generate the equivalent number of units in other areas.

The biodiversity net gain credits purchased will then be invested into habitat creation and enhancement.

How Can Collington Winter Assist with Biodiversity Net Gain, London?

Collington Winter Environmental are experts in BNG planning and have helped numerous London based clients over the years. It is important to note that this varies across each local planning authority in the country. Completing net gain for biodiversity through development is something that we are qualified and experienced in.

We assist all types of developers in achieving BNG to ensure planning permission is granted in England.

We are determined to offer you the support you need in order to reach BNG requirements. We can assist with biodiversity net gain by providing: 

Our Ecology Director, Olivia Collington, holds a Natural England license. If you would like to find out more about the services we provide, feel free to contact us using the details belowBottom of Form.

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