BNG
Free BNG Unit Uplift Calculator — England
Compare baseline and proposed units from the official biodiversity metric against a 10% uplift. This is not a statutory metric or compliance assessment.
Compare units already calculated with the official metric
This tool calculates a 10% uplift from supplied units. It does not calculate habitat value or establish statutory BNG compliance. Use the applicable official biodiversity metric first. Keep area habitats, hedgerows and watercourses separate; do not combine their unit types.
England exemption guidance changed on 6 August 2026, including qualifying sites of 0.2 ha or less and temporary development. Priority-habitat impacts, application dates and transitional rules matter. Check the current exemptions before assuming a requirement applies. Reviewed 12 September 2026.
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Review ecology alongside planning constraints
Keep source evidence, assumptions and specialist follow-up visible in your early site appraisal.
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