What’s Changed?
From August 6th 2026, changes to Biodiversity Net Gain (BNG) have been implemented through new regulations under the Biodiversity Gain Requirements (Exemption) Regulations 2026.
For smaller development sites, BNG requirements have often meant additional surveys, calculations, costs and delays before work can begin. The latest update introduces an area based exemption for development sites of 0.2 hectares (2,000m²) or less, helping to reduce the administrative burden for smaller schemes.
Why Does It Matter?
For qualifying developments, the change can remove some of the additional cost and complexity associated with mandatory BNG. This can include the need for:
- Ecological surveys for mandatory BNG
- Biodiversity metric calculations
- Off site biodiversity unit purchases
The update is expected to benefit a significant proportion of minor residential planning applications.
Why Was the Change Introduced?
For smaller sites, the cost of ecological surveys and navigating the statutory biodiversity metric could sometimes be disproportionate to the scale of the development.
The new threshold is intended to help unblock local housing delivery, particularly on infill plots, small brownfield sites and small scale rural developments.
Important Caveats
The exemption isn’t a free pass.
Protected habitats– The exemption does not apply where protected or priority habitats are present.
Other environmental rules still apply- Wider wildlife legislation, Tree Preservation Orders and local planning policies remain fully relevant.
Check local requirements – Local validation checklists and regional planning requirements should still be reviewed, particularly during transitional periods.
What Could This Mean for Your Development?
For qualifying smaller schemes, the new threshold could mean:
- Lower pre construction costs
- A simpler planning process
- Fewer administrative hurdles
- Faster pathways towards approval
The change aims to reduce red tape for the smallest developments while maintaining BNG requirements for larger schemes.
Considering a Development?
Our Planning & Development team can help you understand what the latest BNG requirements could mean for your site.
Contact a member of our Rural team today!
