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Grey Belt Assessment
Check whether your Green Belt site qualifies as "grey belt" under the NPPF December 2024 framework — and what that means for your application.
About this tool: Grey Belt Assessment
Grey belt assessment under the revised NPPF — whether Green Belt land qualifies as grey belt and what that unlocks for development.
When to use it
Use for sites in the Green Belt to test whether the grey belt route could apply before conceding a very special circumstances case.
Policy and guidance it draws on
NPPF 2026 Green Belt policies GB1-GB8
Part of Route Intelligence
Use these tools to determine whether you need planning permission and which type of application to submit. Getting the consent route wrong wastes time and money. Check PD rights first, then consider whether prior approval or full planning is the better option.
Related tools
PD Rights CheckerChange of UsePrior ApprovalLDC CheckerListed BuildingEIA ScreeningGreen BeltAmendment AdvisorGuidance to help you prepare — not formal planning advice. Check the current policy text and your council's local plan before relying on it.