Biodiversity Net Gain Lancashire: Understanding BNG
All permitted developments in England now require specific measures during the planning stage. These measures vary depending on the design and nature of the project; one expected by all is a 10 % improvement of the on-site biodiversity and local environmental health.
Biodiversity Net Gain (BNG), introduced at the start of 2024, calls on developers and local authorities to consider initiatives which will benefit the natural environment, boost the recovery of irreplaceable habitats, and increase biodiversity.
BNG becoming a mandatory requirement encourages developers to create lasting positive environmental impact for their development site area and local community, either on-site or by purchasing units to offset biodiversity credits elsewhere.
There are many ways this can be achieved, such as mitigating biodiversity loss, building mindful infrastructure, using habitat creation techniques, and safeguarding protected species and ecological networks.
In England, BNG has been mandatory for all major developments since February 2024 and all non-major developments from April 2024 under the Town and Country Planning Act 1990 (as inserted by Schedule 14 of the Environment Act 2021).

Achieving a Biodiversity Net Gain, Lancashire
Lancashire County Council is focused on recovering nature and existing habitats through biodiversity gain planning and has followed the government’s example by implementing a base-level BNG requirement, resulting in a 10% increase for all proposed developments.
Projects must deliver an improvement to nature that can be kept up over the course of at least 30 years, which must be outlined with supporting evidence in any planning permission application documents. If BNG is not possible at the location of development, developers must accomplish the gain off-site by purchasing biodiversity units elsewhere.
The Planning Practice Guidance for Biodiversity Net Gain for England is located to provide further guidance on the GOV.UK website.
What types of developments does BNG apply to?
Inclusive to developments of all sizes, both minor and major developments should be supplemented with a BNG plan. For larger infrastructure projects, this applies to residential projects that host 10 or more dwellings or sites that span more than 0.5 hectares. Minor developments are also included, such as projects 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 metres or the site area is less than 1 hectare.
Good Practice Principles of Biodiversity Net Gain
There are 10 vital good practice principles of biodiversity net gain that can help a project showcase a conscious effort towards the BNG requirement. Outlined below are the mandatory net gain principles to successfully achieve BNG:
- 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-development stakeholders in creating mandatory BNG solutions. Those involved after development should also be included in the process.
- Focus on producing sustainable 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
Implementing Biodiversity Net Gain, Lancashire
BNG requires developers to become directly involved in protecting important habitats. If you’re uncertain how biodiversity net gain (BNG) might affect your planning application, it’s important to contact your local planning authority or consult an experienced ecologist early on, especially if your development could be significantly impacted.
Our ecological consultants can carry out a habitat assessment using the Statutory Biodiversity Metric (formerly Defra Metric 4.0). We will then incorporate the results into a tailored habitat management and monitoring plan, which factors in local nature recovery strategies to help ensure your project achieves the required net gain.
How can Collington Winter assist with BNG?
Collington Winter Environmental’s ecology and landscape architecture teams are licensed by Natural England and work with a wide range of clients throughout England and Wales, including the Lancashire region.
Whether your project is large or small, we can support developers in understanding the core principles of Biodiversity Net Gain (BNG) and how to effectively meet them. With extensive experience, our specialists are well-equipped to help prepare a biodiversity net gain plan that aligns with the requirements of Lancashire County Councils.
To learn more about our approach to biodiversity net gain in Hertfordshire, get in touch with our team at info@collingtonwinter.co.uk, or simply complete the contact form below.
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