Document bundle for a Green Belt infill plot

Green Belt infill documents start with one decision, not with a list: which Green Belt exception are you relying on? Everything you submit afterwards is evidence for that single proposition. A bundle assembled before that question is answered tends to contain a lot of paper and no argument.

For a single plot in a village, the exception almost always relied on is limited infilling in villages. It appears in the Green Belt chapter of the National Planning Policy Framework (August 2026 edition), and if the proposal falls within it, the development is not inappropriate in the Green Belt at all. No very special circumstances are needed. That distinction is worth more than any individual report, because it changes the test the officer applies.

Establishing which exception is relied on

Three routes come up on small Green Belt plots. Limited infilling in villages. Limited infilling or the partial or complete redevelopment of previously developed land. And, where the authority has identified it, land released from the strongest Green Belt functions under the grey belt approach introduced by the December 2024 Framework and carried into the current edition. The grey belt position is still settling, so check how your authority is applying it rather than assuming.

Your Planning Statement has to nail its colours to one of these and argue it properly. Pleading all three in the alternative reads as weakness, and officers treat it that way.

State the exception in the first page. Then structure the rest of the statement as the tests that exception carries: is this a village, is the site a gap within it, is the infilling limited, and does the scheme preserve openness.

Evidence that the site is infilling

This is where applications are won and lost, and it is mostly drawing work rather than report writing.

You need a plan at a scale that shows the built frontage either side of the plot, with the gap measured. You need the settlement boundary, if the adopted plan draws one, and the village's own extent if it does not. And you need something that establishes the plot is a gap in an otherwise built-up frontage rather than the edge of the village or the start of open countryside.

Useful material includes:

• A site location plan at 1:1250 with the built frontage shown both sides
• A measured frontage plan giving the width of the gap and the width of neighbouring plots
• Historical mapping where the plot was previously built on
• Photographs taken along the frontage in both directions, dated
• An extract of the adopted policies map showing the Green Belt boundary and any settlement boundary

A gap wider than the plots either side is the usual reason an infill argument fails. If your plot is 30m wide and its neighbours are 12m, the honest position is that this is not infilling, and a different exception or a very special circumstances case is needed.

Openness material

Openness has a spatial component and a visual one. The courts have made clear it is not purely visual, so volume and footprint matter even where a scheme is screened.

Submit a comparison of existing and proposed built volume and footprint, set out as a table with the method stated. Where a building is being replaced, that comparison is the heart of the case. Where the plot is undeveloped, the comparison is against nothing, and the argument shifts to whether the scheme sits within the pattern of the frontage.

Visual material should include street elevations showing the proposal between its neighbours, sections through the site where levels change, and views from any public vantage point the authority is likely to raise. On a sensitive frontage a Townscape and Visual Impact Assessment is proportionate. On a single plot in an unremarkable village it is usually overkill, and a well-drawn set of elevations does the job.

Design, siting and the rest of the application pack

A Design and Access Statement is not a national validation requirement for a single dwelling unless the site is in a conservation area or the works affect a listed building, but most authorities ask for one on a Green Belt plot and it gives you somewhere to put the siting argument.

Cover the building line, the ridge height against neighbours, the plot coverage, the position of outbuildings and hardstanding, and the boundary treatment. Garden depth and the depth of built form behind the frontage both feed the openness point, so address them deliberately rather than leaving them to be inferred from the drawings.

Where the village is also a conservation area, the pack grows: see which documents a conservation area application needs, because the heritage test runs alongside the Green Belt one rather than instead of it.

Where very special circumstances evidence is needed

If the scheme does not fall within an exception, it is inappropriate development, and permission can only follow if other considerations clearly outweigh the harm to the Green Belt plus any other harm.

That case needs its own evidence, and it is specific to the applicant and the site. Affordable housing delivery, self-build demand recorded on the authority's register, the fallback position of an existing lawful use, an economic benefit, or personal circumstances backed by medical or care evidence. General housing need alone rarely gets there on a single plot.

Keep that material in a clearly separated section. Mixing a weak exception argument with a thin very special circumstances case produces a report that persuades nobody.

Ecology, trees and drainage

Biodiversity net gain applies to most small sites, and a Green Belt infill plot is usually exactly that. The Biodiversity Net Gain Assessment and the biodiversity gain plan have to be prepared using the statutory metric by someone competent to complete it, which the Environment Act 2021 regime expects. A draft can structure the document and identify what is missing, but the metric itself is specialist work and a licensed or competent professional is required.

A village plot with hedgerows and mature trees will also need a tree survey to BS 5837:2012 showing root protection areas against the proposed footprint and access. Hedgerow removal for visibility splays is a frequent reason for a refusal on these sites, so test the access geometry against the trees before the design is fixed.

On drainage, a plot of less than one hectare outside Flood Zones 2 and 3 will not normally need a Flood Risk Assessment, but a surface water strategy showing where run-off goes is often requested, particularly where the site drains towards the lane. Soakaway feasibility depends on the ground, and the answer costs less to find out before the layout is set.

An illustrative plot

A 14m wide gap between two 1960s bungalows on a village lane, both with 13m frontages, inside the Green Belt but outside any conservation area. The plan draws no settlement boundary. The bundle that works here is a Planning Statement arguing limited infilling in villages, a measured frontage plan, dated frontage photographs, street elevations, a footprint and volume table, a BS 5837 tree survey covering two oaks on the boundary, a biodiversity metric and gain plan, and a short surface water note. No heritage report, no transport work, no landscape assessment.

That is six or seven documents, not fifteen. This example is illustrative, and the requirements on any real plot depend on the authority's own validation list.

Conditions limiting future extension

Expect a condition removing permitted development rights under Part 1 of Schedule 2 to the GPDO 2015. Authorities impose it on Green Belt infill routinely, on the basis that a modest house approved on openness grounds should not become a large one without a further application.

Argue about its scope rather than its existence. A condition removing Class A, Class AA and Class E rights is defensible. One removing everything including Class F hard surfacing and Class G flues is usually broader than the planning purpose requires, and asking the case officer to narrow it before the decision is issued is simpler than varying it afterwards.

PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval. This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it.