DEVELOPER BNG OBLIGATIONS

Developer BNG obligations.

A developer-focused guide to the evidence, hierarchy and off-site unit checks behind Biodiversity Net Gain compliance.

BNG RESOURCE · UPDATED 26 JULY 2026

Decision-ready guidance for England's BNG market.

Avoid biodiversity loss first, then minimise, restore and enhance on site before relying on off-site units or statutory credits.

Use the statutory biodiversity metric to identify the remaining unit requirement after realistic on-site proposals.

Off-site supply should align with the development shortfall, habitat type, trading rules and local relevance.

Review the gain site legal agreement, HMMP obligations, management period and enforcement route.

Confirm whether gain site and allocation evidence support the planning submission and public traceability.

Off-site units should be available when the planning timetable needs them, not only theoretically promised.

A spreadsheet number without legal, ecological and registration support is not a robust BNG solution.

Statutory biodiversity credits are intentionally a last-resort mechanism.

COMMON QUESTIONS

When on-site measures cannot deliver the required Biodiversity Net Gain after the hierarchy has been applied.

Metric output, habitat type, location, HMMP, legal agreement, registration status and allocation process.

No. Statutory credits are a government last-resort option, not a normal off-site habitat bank purchase.

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