Biodiversity Net Gain Bridgend: Understanding BNG

In order to protected the natural environment, Bridgend County Borough Council require a biodiversity net gain of at least 10% for all development projects.

In England and Wales, BNG is mandatory under the Town and Country Planning Act 1990 (as inserted by Schedule 14 of the Environment Act 2021). Development projects must deliver a biodiversity net gain that is sustained for a span of at least 30 years. If the required BNG levels are not achieved at the outset, the mitigation hierarchy should be applied to ensure the project eventually meets the required standard. Alternatively, if a positive BNG effort is not possible on-site, developers must implement the 10% biodiversity increase elsewhere by purchasing BNG credits.

Enhancing biodiversity net gain is particularly important for protected or high-value nature conservation areas, such as Sites of Special Scientific Interest. 

The Planning Practice Guidance for Biodiversity Net Gain for England can be found on the GOV.UK website.

Biodiversity net gain can be expected for developments of all sizes. For larger projects, this applies to residential projects that host 10 or more dwellings or sites that span more than 0.5 hectares. Furthermore, BNG covers minor developments, such as residential developments with 1 to 9 dwellings or sites smaller than 0.5 hectares, as well as commercial developments where the floor space created is under 1000 square metre, or the site area is less than 1 hectare.

There are 10 crucial good practice principles of biodiversity net gain that can help a project achieve the expected 10% improvement if they are implemented into a BNG plan. The mandatory net gain principles include the following:

• Utilise the mitigation hierarchy to minimise the impact on biodiversity
• Eliminate any negative impacts of development on biodiversity
• Communicate each BNG outcome with complete transparency
• Cover all areas of sustainability, including societal and economic factors
• Involve any pre and post-development stakeholders in creating mandatory BNG solutions
• Focus on producing lasting natural benefits for biodiversity to leave a site and local wildlife in an improved state
• Understand the variable factors and potential risks in order to deliver BNG
• Attempt to exceed the base level requirement for biodiversity gains where possible
• Determine a suitable method in order to secure measurable on-site BNG gains
• Ensure the best possible results from biodiversity net gain

Those unsure of how biodiversity net gain may affect a planning application should contact the local planning authority. If it is implied that your development may become heavily impacted, we recommend that you contact an experienced ecologist as soon as possible.

This way, you can assess whether your development plans meet BNG requirements as well as the specific approach you may need to take in order to meet development planning standards.

At Collington Winter, our environmentally focused team has a proven track record of ensuring BNG on development sites in Bridgend. Our ecologist team will provide guidance throughout the planning process, supported by a visit to your site to best inform a BNG plan and to perform any recommended ecological reports.

Our consultants will complete a habitat classification assessment using a Statutory Biodiversity Metric (previously the Defra Biodiversity Metric 4.0). The data will then be used to calculate a number of biodiversity units to measure changes to the natural environment before and after the development. The results of the assessment will then be converted into a habitat management and monitoring plan that promotes biodiversity.

Collington Winter’s team of ecology professionals hold Natural England licences and work with numerous clients across England and Wales, including Bridgend. From minor projects to large-scale developments, we can provide policy guidance, project recommendations and clarification on the principles of BNG to meet the needs of Bridgend County Borough Council.

To find out more about Collington Winter’s approach to biodiversity net gain, Bridgend, please get in touch with a member of our team using the contact form below.