Understanding The Statutory Biodiversity Metric: A Guide for Developers

As of 12th February 2024, Biodiversity Net Gain (BNG) has become mandatory for most development projects in England (with exemptions, click here to find out if you are exempt). A key tool in achieving BNG is the Statutory Biodiversity Metric, which measures biodiversity value and helps developers make informed decisions about habitat enhancements. In this blog post, we’ll delve into what the metric is, who should use it, and how it can be applied in the planning process.


Image of hedgerow and fields with the title What is the Statutory Biodiversity Metric?

The statutory biodiversity metric is an official tool used to measure the biodiversity value of habitats for the purpose of BNG. It assesses various habitat types, including grassland, hedgerows, woodland, and watercourses by calculating biodiversity units. These units quantify the biodiversity value of habitats and are crucial for achieving the required 10% BNG.

Who Should Use the Metric Tool and Why?

If your development project falls under mandatory BNG requirements, you’ll need to utilise the metric tool to assess biodiversity value. Whether it’s a major development, small development, or nationally significant infrastructure project (NSIP) using the metric tool will be essential for demonstrating BNG compliance.

To ensure calculations, it’s advisable to hire a competent person, such as an ecologist, to use the metric tool and provide guidance on its calculations. This ensures that the submissions are comprehensive and meet the requirements set by local planning authorities (LPAs).

Using the Metric Tool

The metric tool requires specific information about existing habitats and proposed developments, including habitat types, sizes, conditions and strategic significance. By inputting this data, the tool calculates the biodiversity value of habitats and predicts how developments will impact biodiversity.

Using the metric tool early and continually throughout the planning process is crucial for optimising biodiversity gains on-site and minimising losses. By comparing different scenarios and iterations, developers can identify opportunities to enhance habitats and achieve BNG more effectively.


Want to Learn More?

You can find the full guidance here. If you’re a developer navigating the complexities of BNG compliance, or a landowner looking to create a biodiversity gain site, we’re here to help. Contact us today to learn more about our services and how we can assist you in achieving your BNG goals.

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Unlocking BNG Success: The Vital Role of Ecologists

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Recording Allocation of Off-Site Biodiversity Gains: A Step-by-Step Guide