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Grey belt checker

Is your small site grey belt?

Six guided questions for landowners with small Green Belt parcels (typically 1-20 homes). The checker applies the NPPF (December 2024) grey belt definition and tells you whether the site looks worth assessing properly. It is not a planning decision — but it stops you wasting time chasing a category that does not fit.

Current judgement

Possibly grey belt

Worth investigating — the answer hinges on how 'strongly' the parcel contributes to Green Belt purposes.

Is the parcel in the Green Belt?

Check the council's policies map. Grey belt only exists inside the designated Green Belt.

Is the parcel previously developed land (PDL)?

PDL means land with substantial buildings or hard surfaces — small farmyards, redundant outbuildings, paddocks with redundant stables, former workshops. Domestic gardens, agricultural land and parks are excluded.

Does the parcel strongly check the sprawl of a large built-up area?

NPPF purpose (a). Most small edge-of-settlement parcels do not — a few homes rarely move the needle on city or large-town sprawl. Strong contribution usually means a meaningful buffer against a major urban edge.

Does it strongly prevent neighbouring towns merging?

NPPF purpose (b). Only counts where the parcel sits in a strategic gap between two named settlements. A small parcel inside a wider gap is usually not, on its own, doing the strategic work.

Does it strongly preserve the setting of a historic town?

NPPF purpose (d). The setting of a designated historic town — not just any village with old buildings. Most small parcels are too small to materially affect a historic town's setting.

Do any footnote 7 designations provide a strong reason against development?

Footnote 7 (NPPF para 11) lists designations that 'provide a strong reason for restricting development' — National Landscapes, National Parks, SSSIs, SAC/SPA/Ramsar, irreplaceable habitats, designated heritage assets and functional floodplain. They only exclude grey belt where the constraint is actually strong on this parcel — a minor setting impact on a distant listed building, or a corner clipping Flood Zone 2, is not enough.

Verdict

Possibly grey belt

Confidence: Medium

Your answers suggest a moderate contribution to one or more grey belt purposes, or a partial footnote 7 overlap. The NPPF test is whether the contribution is strong — so a small site on the borderline can still qualify with the right scoring evidence.

Want a mapped grey belt read?

A free site assessment checks Green Belt boundaries, designations and policy context against your boundary.

Assess site

Suggested next steps

1

Get an independent Green Belt purposes assessment for the specific parcel — 'strongly contributes' is a judgement, not a fact.

2

Check whether any recent local plan review or call for sites has already scored the parcel.

3

Look at nearby small-site grey belt approvals or appeal decisions for read-across.

4

Decide whether Permission in Principle, an outline application or a pre-application is the right next step.

The 'golden rules'

Even if a site is grey belt, the NPPF expects schemes to meet:

  • 50% affordable housing (or the local plan maximum, whichever is lower).
  • Necessary improvements to local or national infrastructure.
  • Provision of accessible new green space.

Important caveats

  • 'Strongly contributes' is a judgement — councils, inspectors and appellants can legitimately disagree.
  • Purpose (c) — safeguarding the countryside from encroachment — is deliberately excluded from the grey belt test.
  • This checker does not replace a planning consultant's assessment.