BNG Exemption Calculator

This simple tool will help you determine if your development might be exempt from Biodiversity Net Gain (BNG) requirements. Fill in the details of your project and we'll provide an instant assessment based on current national exemption criteria. Remember that local authorities may have additional or different requirements, so always check with your planning department for final confirmation.

BNG Exemption Calculator

What type of development are you planning?

Can your development be carried out under permitted development rights?

Yes No

Does your development already have planning permission?

Yes No

When was planning permission granted?

Before February 12, 2024 On or after February 12, 2024

What is the size of your development site?

Less than 1 hectare 1 hectare or more

How many dwelling houses will the development create?

Fewer than 10 10 or more

Is your development on a brownfield site?

Yes No

Does your brownfield site meet ALL of the following criteria?

Site is on the brownfield land register Site has not been in active use for at least 10 years Site has significant structures requiring demolition BNG would make redevelopment economically unviable

Exempt

Reason:

Note: This is a temporary exemption that expires on April 2, 2026. After this date, your development will need to comply with BNG requirements.

Important: This calculator provides general guidance based on national BNG exemptions. Local authorities may have different or additional requirements. Always consult with your local planning authority and consider seeking professional advice.

Stay in the loop

Email Address

Thank you!

Bee.Wise.Eco

95 Algernon Road
London SE13 7AP

rita@beewise.eco
+44 07832 329687