The Casterton housing appeal for up to nine homes has been dismissed after an Inspector found that the scheme would erode a valued gap between two parts of a Yorkshire Dales village. Inspector N Unwin issued the decision on 3 November 2026, ruling that harm to the National Park landscape and highway safety outweighed the limited housing benefits.
The proposal concerned an agricultural field east of Fern Croft and Smithy How in Casterton. Applicant Angela Clarke sought permission in principle rather than detailed planning permission, challenging the Yorkshire Dales National Park Authority’s refusal of application S/05/78/PIP. The Inspector considered the site’s location, proposed residential use and amount of development, with technical details to follow only if that first stage succeeded.
The Casterton housing appeal demonstrates that national policy support for additional homes does not override the particular constraints of a protected landscape. It also shows why applicants cannot simply assume that access safety, settlement boundaries or the landscape role of an open field can all be deferred to a later stage.
Why the Casterton housing appeal failed
Three main issues were examined in the Casterton housing appeal: the location of housing under the development plan, the impact on the character and appearance of the Yorkshire Dales National Park, and highway safety. Each counted against the proposal. The national planning policy framework was updated during the appeal, and the National Park’s Local Plan 2025 to 2040 was adopted before the decision. The Inspector applied these current policies.
Casterton is classified as a large village, but it has two distinct development boundaries, covering its northern and southern parts. The field was outside, although next to, the northern boundary. The Inspector said the village offered a limited range of facilities, making the established settlement boundary important to the strategy for locating housing.
The proposal would conflict with policies CP3 and C1 of the National Park Local Plan. Nearby houses did not make the site part of the existing settlement for planning purposes. Our guide to building outside a settlement boundary explains why land adjoining a village may face different policies from plots within its defined limits.
The open field separating two parts of Casterton
Landscape impact was central to the Casterton housing appeal. The northern section of Casterton contains a relatively close-knit group of homes, a school, nursery and church. The southern section has a looser ribbon of development with gaps between buildings. Agricultural land provides an important visual break between these different settlement patterns.
Describing the appeal field, Inspector Unwin wrote: “This area of open land serves to visually separate the two parts of Casterton and their distinctly different characters.” Even a relatively low-density, landscaped scheme would reduce the gap, make the settlements appear to merge and undermine the historic village pattern, the decision found.
That was not simply a question of whether any new houses would look attractive. The field’s undeveloped character performed a function in the wider landscape. The Inspector found the proposal would neither conserve nor enhance the National Park, contrary to its first statutory purpose and relevant local policies. Policy N4 of the August 2026 national framework gives substantial weight to conserving and enhancing such landscapes.
This is why a landscape character assessment must examine how the location functions as part of a settlement, not merely whether planting might screen new buildings. The dispute concerned the principle of losing an open space, rather than architectural details capable of being improved in a later submission.
A narrow lane and school traffic created a second barrier
Highway safety provided a separate reason to dismiss the Casterton housing appeal. Access would have been taken from a single-lane road with intermittent passing places, high hedges and limited visibility. The entrance to a school was nearby, bringing additional vehicle movements to a stretch where pedestrians did not have a proper footway.
The Inspector considered that up to nine new homes would generate more traffic, with a greater chance of conflicts between vehicles and pedestrians. The interaction with traffic at the school particularly mattered given the narrow road and restricted sightlines. This was about whether the only possible access could work safely, rather than whether there was room on the site for an entrance.
Although precise access designs normally come with technical details consent, the Inspector decided that this did not relieve the applicant of showing that the principle of access at this location was acceptable. With no technical assessment demonstrating a solution, the Inspector was entitled to reach a planning judgement using the available evidence and site visit observations. That led to a finding of unacceptable highway safety harm.
Why housing need did not change the decision
The Casterton housing appeal also tested the balance under the August 2026 national framework. The applicant suggested that the field qualified as limited infilling within a group of houses under policy S5. The Inspector disagreed: a road and school lay to the east and an open field to the south, so the appeal site was not a gap surrounded by existing dwellings.
Where development outside a settlement does not fit one of the forms supported by policy S5, exceptional circumstances require its benefits to substantially outweigh its adverse effects. Up to nine homes would add to the housing stock, but the Inspector attached modest weight to that contribution and the resulting economic and social benefits. There was no automatic prohibition on new rural housing, but the balance was demanding for this location.
The appellant pointed to an ageing population, younger households leaving the National Park and a rising housing requirement. Affordable housing and local occupancy restrictions were put forward as matters that could be dealt with later. However, obligations could not be secured at the permission in principle stage, so the Inspector found insufficient certainty that those benefits would be delivered and gave the argument limited weight.
Landscape harm and unsafe access counted far more heavily. The Inspector concluded that the benefits would not substantially outweigh those harms, and the proposal conflicted with the development plan as a whole. The decision is significant because the housing arguments were assessed, not dismissed merely because the land was inside a National Park.
What this means for permission in principle applications
The Casterton housing appeal illustrates the limits of the two-stage permission in principle route. The first stage establishes whether a site is acceptable for a proposed use and scale of development. It is not a guarantee that every difficult question can wait until technical details consent. The function of a landscape gap and the inherent suitability of the only access can be decisive from the start.
Anyone promoting housing on the edge of a village should establish the adopted boundary, test what an undeveloped field contributes to the settlement, assess nearby traffic hazards and evidence the delivery of any claimed housing benefits. Our rural exception sites guide considers a different potential approach to particular affordable schemes, but there was no sufficiently certain affordable housing package here to shift the balance.
The Casterton housing appeal is reference 6010771. The National Park Authority application was S/05/78/PIP and the decision was issued on 3 November 2026. Casterton Parish Council had described the original application for up to nine homes in March 2026. The Planning Inspectorate appeal record gives the formal decision. The appeal decision is also available on AppealBase.
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