The Government has confirmed a series of amendments to the Biodiversity Net Gain (BNG) regulations, with the changes taking effect from the 6th of August 2026. The aim is to reduce the administrative burden on smaller developments while maintaining protections for biodiversity.
Key Changes:
- New 0.2 hectare exemption. Developments on sites of 0.2 hectares or less will no longer be required to deliver mandatory BNG, unless priority habitat on the site is affected.
- Temporary developments. Planning permissions granted for five years or less will also be exempt from mandatory BNG where no priority habitat is impacted.
- Greater flexibility for minor developments. Minor developments that are not exempt can now choose to deliver their biodiversity gain off-site without first demonstrating that on-site provision has been considered.
- Removal of the self-build exemption. The previous exemption for self and custom-build developments has been withdrawn.
Transitional Arrangements:
The changes only apply to planning applications submitted on or after the 6th of August 2026. Applications already submitted before this date will continue to be assessed under the existing BNG legislation.
What Does This Mean?
For many small-scale developments, these changes could simplify the planning process and reduce upfront costs. However, developers should remember that exempt schemes must still comply with wider planning policies and environmental legislation, and local planning authorities will continue to consider impacts on biodiversity when determining applications.
If you’re considering a development and would like to understand how the new Biodiversity Net Gain exemptions could affect your project, get in touch with Sheldon Bosley Knight’s Planning and Architecture team. Our experienced planners can advise whether your proposal qualifies for an exemption and guide you through the planning process. Call us on 01789 387880 or email planning@sheldonbosleyknight.co.uk.