Understanding what is changing — and what is not
Recent government announcements around Biodiversity Net Gain (BNG) exemptions have prompted questions across the planning and development sector.
In particular, proposals to expand exemptions for smaller developments have led some to ask whether Biodiversity Net Gain is becoming less relevant, or whether off-site delivery will still be required.
This article explains what the changes mean in practice, what remains unchanged, and why clarity is still essential when planning development or considering land for Biodiversity Net Gain delivery.
What has changed?
Government proposals have confirmed that certain smaller developments may fall outside the mandatory Biodiversity Net Gain requirement.
The intention behind these changes is to reduce regulatory burden on small-scale development while maintaining overall biodiversity objectives.
These exemptions are specific and limited, and they do not remove Biodiversity Net Gain from the planning system as a whole.
What has not changed
Despite changes to exemption thresholds, Biodiversity Net Gain remains a core requirement for the majority of developments requiring planning permission.
Where BNG applies, the requirement to deliver a measurable improvement — typically a minimum of 10% — is unchanged.
Planning authorities will continue to require clear, auditable evidence that Biodiversity Net Gain has been delivered and secured.
Why exemptions still require careful attention
While exemptions may remove the requirement for some projects, they also introduce new points of uncertainty.
Developments close to exemption thresholds may still need careful assessment, particularly where site characteristics, planning conditions, or local policy introduce additional requirements.
Assuming an exemption applies without confirmation can introduce planning risk later in the process.
Implications for developers
For developers, the key implication is not whether exemptions exist, but whether they apply to a specific project.
Early clarity remains important. Where Biodiversity Net Gain applies, understanding the scale of the requirement and delivery options early helps avoid delay.
Off-site delivery remains an important and accepted route where on-site delivery is constrained, regardless of changes to exemptions.
Implications for landowners
For landowners considering whether land may be suitable for Biodiversity Net Gain delivery, exemptions do not remove the need for long-term habitat provision.
Demand for off-site Biodiversity Net Gain remains driven by larger and more complex developments, which continue to require reliable, long-term delivery solutions.
Clarity around planning policy supports confidence for landowners and developers alike.
Why simplicity still matters
One of the challenges with Biodiversity Net Gain is not the principle, but the complexity of interpretation.
Policy changes, exemptions, and guidance updates all reinforce the need for a clear, structured approach.
Understanding when BNG applies, what is required, and how delivery works remains essential.
Looking ahead
Biodiversity Net Gain is still evolving as a planning tool.
Exemptions may change at the margins, but the underlying objective — delivering measurable biodiversity improvement alongside development — remains firmly embedded.
For those involved in planning, development, or land management, staying informed and approaching BNG with clarity remains the most effective route forward.
Need clarity on your project?
If you are unsure whether Biodiversity Net Gain applies to your development, or how recent changes may affect your project, the best place to start is understanding the requirement.
Clear advice early helps avoid uncertainty later.
Simply delivering Biodiversity Net Gain.