Biodiversity Net Gain Oxfordshire: Understanding BNG
Since February 2024, Biodiversity Net Gain (BNG) has become a mandatory requirement for most planning applications in England, including those in Oxfordshire. Biodiversity net gain, Oxfordshire, is designed to ensure that any new development – urban or rural – leaves the environment in a better state than before.
Rooted in the Environment Act 2021 and implemented through updates to the Town and Country Planning Act 1990, this policy supports the UK’s broader goals for nature recovery and climate resilience.
Oxfordshire developers are now required to demonstrate a minimum 10% biodiversity net gain as part of planning permission. This applies to both minor and major developments, from small-scale housing to large commercial sites.
Proposals must include a Biodiversity Gain Plan, and the agreed commitments are often secured through Section 106 agreements to ensure long-term delivery.

Supporting Nature Recovery with BNG, Oxfordshire
Oxfordshire is home to rich biodiversity and diverse landscapes, including ancient woodlands, species-rich grasslands, and protected wetlands. To support these natural assets, developers are encouraged to work in alignment with the Oxfordshire Local Nature Recovery Strategy (LNRS).
This helps to ensure projects contribute to local priorities like restoring wildflower meadows, enhancing hedgerows, or protecting habitats for species such as water voles and skylarks.
In cases where on-site biodiversity gains are limited by the nature of the development, Oxfordshire County Council and South Oxfordshire District Council permit the use of off-site biodiversity units. These can be purchased through registered habitat banks or biodiversity offset schemes, provided the enhancements are measurable, verifiable, and maintained for at least 30 years.
Woodland creation, wetland restoration, and hedgerow planting are among the popular approaches to delivering these gains across the county.
BNG Principles for Oxfordshire Developers
There are ten guiding principles that underpin successful BNG planning:
- Follow the mitigation hierarchy to reduce biodiversity loss.
- Avoid impacting irreplaceable priority habitats.
- Work collaboratively and transparently with stakeholders.
- Promote sustainability across ecological, social, and economic dimensions.
- Engage with specialists and local communities throughout the project lifecycle.
- Deliver measurable, long-term improvements to biodiversity.
- Account for risks and changes over time.
- Aim to exceed the 10% requirements when possible.
- Use the latest biodiversity metric tools/
- Ensure projects provide lasting value for nature.
How Collington Winter can Help in Oxfordshire
At Collington Winter Environmental, our team of ecologists and environmental consultants works with developers across Oxfordshire to ensure BNG compliance. We assess habitats using the latest Statutory Biodiversity Metric and prepare detailed habitat management and monitoring plans.
With the certification of Natural England licences, our experts are familiar with local planning authorities policies and requirements, and we offer practical, tailored advice to support an application with your site habitats in mind.
Whether you’re planning a housing development near Oxford or a commercial project in Banbury, our team is here to help deliver ecological outcomes that benefit both people and surrounding nature.
To learn more or speak to an ecological consultant about how we can help your development site achieve BNG, contact us at info@collingtonwinter.co.uk or fill out the contact form below.
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