Kirklees grey belt house clears GB7 but still loses appeal

A proposed grey belt house in Linthwaite has cleared the new national Green Belt test but still lost at appeal after an Inspector found separate harm to local character, trees and the conservation area.

Inspector N Armstrong dismissed Appeal 6006003 on 30th September 2026, concerning land beside Manchester Road in Linthwaite. The decision is an early example of the revised August 2026 National Planning Policy Framework being applied to a small housing scheme.

The Kirklees grey belt house succeeded on the Green Belt issue itself. But that did not remove the need to satisfy heritage, design, tree and other development-management policies.

Why the grey belt house passed GB7

The appeal site is an open, sloping parcel between existing housing on Manchester Road. It contains grass, scrub, trees and a public right of way leading towards countryside beyond.

It also lies within the Linthwaite Conservation Area. That became crucial later in the appeal, but it did not prevent the site qualifying as grey belt.

The appeal had to be decided against the NPPF published on 17th August 2026. Under policy GB6, Green Belt development is inappropriate unless it falls within one of the categories in GB7.

For this grey belt house, the relevant route was GB7(1)(g). That is the revised grey belt route which replaced the substance of paragraph 155 in the December 2024 Framework.

Grey belt is defined as previously developed land and/or other Green Belt land which does not strongly contribute to purposes (a), (b) or (d) of Green Belt policy.

Kirklees and the appellant agreed that the site did not strongly contribute to those purposes. The Inspector saw no reason to disagree, writing that “the site can reasonably be described as grey belt land”.

The decision then moved to the rest of GB7(1)(g). The Inspector found that adding one house between existing development would create only a modest degree of countryside encroachment.

The site was small and physically contained by housing, trees and the public right of way. In that context, the proposal would not fundamentally undermine the Green Belt purposes taken together across the plan area.

Kirklees could not demonstrate a five-year supply of deliverable housing sites. Its officer report put the supply at 4.18 years, so there was an evidenced unmet need for housing.

The Inspector also found the site sustainable because of its proximity to services, amenities, footpaths and public transport.

That meant all the relevant limbs of GB7(1)(g) were satisfied. The proposal was not major development, so policy GB8 and the Green Belt Golden Rules did not apply.

The Inspector therefore concluded that the scheme was not inappropriate development in the Green Belt. There was no need to consider very special circumstances.

Planning Geek’s guide to grey belt, Green Belt, greenfield and brownfield land explains the terminology and how the categories differ.

Passing GB7 did not decide the appeal

This is where the decision becomes especially useful for practitioners. Grey belt status is not an automatic planning permission.

It changes the Green Belt part of the analysis, but the proposal must still survive the other policies that apply to the site and development.

The grey belt house therefore moved into the wider planning balance with the Green Belt objection removed, rather than with planning permission effectively secured.

Here, the separate problem was the character of this part of Manchester Road. The Inspector accepted that the proposed three-storey front elevation and two-storey rear elevation, using stone and slate, would broadly reflect nearby development as a standalone design.

But she placed weight on the undeveloped gap itself.

The Linthwaite Conservation Area appraisal identifies spaces between buildings as important because they allow glimpses towards the rural setting beyond. The appeal site provided one of those greener visual breaks.

Building on it would materially reduce that opening. The Inspector found that this would erode part of the character that the undeveloped space contributes.

The larger established trees towards the rear of the site were another problem. The appellant argued that the trees were self-seeded, small or poor quality.

However, there was no arboricultural impact assessment providing a detailed appraisal of their condition, quality, retention value and the effect of the proposed development.

Without that evidence, the Inspector was not persuaded that the larger trees should be removed.

She found that the combined loss of the open gap and the larger trees would significantly harm the character and appearance of the site and surrounding conservation area.

Conservation-area harm outweighed the housing benefit

The heritage finding was not treated as a technical afterthought. The Inspector found moderate harm to the significance of the Linthwaite Conservation Area.

She also found that the grey belt house would fail to preserve or enhance the conservation area’s character or appearance.

National policy required substantial weight to be given to conservation of the designated heritage asset. Any harm was therefore a matter of considerable importance and weight.

The strongest public benefit was housing supply. Because Kirklees was below five years, the Inspector gave substantial weight to the general benefit of providing homes.

But this was only one dwelling. Its numerical contribution to the housing shortfall was therefore limited.

The application form also identified the proposal as self-build or custom-build. The appellant was willing to accept an occupancy condition.

However, the Inspector found there was no detailed mechanism before her which satisfactorily secured the house as self-build or custom-build housing. The potential self-build benefit therefore attracted only limited weight.

In the overall heritage balance, the public benefits were not enough to outweigh the conservation harm.

The proposal conflicted with Kirklees Local Plan policies on townscape, heritage, landscape and trees, as well as national design and natural-environment policies.

The BNG point sits in a changing 2026 regime

The same missing self-build mechanism created a second issue around biodiversity net gain.

The application form said mandatory BNG did not apply because the development was self-build or custom-build. The Council’s officer report had acknowledged that exemption.

That needs to be read against the date of the application. This was a 2025 application, so it fell within the transitional regime under which the former self-build and custom-build BNG exemption could still apply.

That exemption was removed for new planning applications made on or after 6th August 2026.

The Inspector did not decide whether BNG ultimately applied. Instead, she noted that the absence of a detailed mechanism securing self-build status also had implications for the claimed exemption and any subsequent BNG assessment.

Because the appeal was already being dismissed for other reasons, she did not pursue the point further.

That makes this different from the recent Maidstone self-build BNG appeal, where the lack of a legal mechanism securing self-build status became a more developed BNG issue.

Our self-build planning guide and BNG guide cover the current rules and exemptions.

What the Kirklees grey belt house decision means in practice

The main lesson is not to treat GB7 as the whole planning case. It is one gateway.

If the land qualifies and the remaining tests are met, the development is no longer inappropriate Green Belt development. The very special circumstances exercise falls away.

But that does not neutralise character, heritage, trees, highways, ecology, neighbour impacts or any other relevant development-management issue.

In Linthwaite, the Green Belt argument succeeded and the appeal still failed because a different group of policies carried greater weight in the final balance.

The revised NPPF reinforces that structure. Policy S5 says that where development in the Green Belt is not inappropriate, approval should follow unless the benefits are substantially outweighed by adverse effects when assessed against the national decision-making policies.

That is what happened here. The limited benefit of one additional dwelling was substantially outweighed by the character and conservation-area harm.

For anyone promoting a grey belt house, it is therefore worth separating two questions at the start.

First, can the site and proposal satisfy GB7? Second, if the Green Belt objection disappears, is there still a robust planning case against every other likely reason for refusal?

This appeal shows why answering only the first question can leave a scheme exposed. Passing the grey belt test removed one obstacle, but it did not cure the rest of the planning case.

Appeal 6006003 was dismissed on 30th September 2026. You can read our locally hosted copy of the appeal decision or check the Planning Inspectorate appeal record.