A roof terrace appeal in Lambeth has succeeded after an Inspector accepted revised plans submitted during the appeal itself, applying two well-established court authorities on procedural fairness. Inspector M Cryan allowed the proposed roof terrace, rear dormer and rooflights on 12 November 2026, notwithstanding some harm to the appearance of the Victorian building.
The application concerned a second-floor flat in a converted three-storey property on Handforth Road in south London. Lambeth Council had refused the scheme, but the appellant subsequently changed the balance between the terrace’s brick parapet and metal balustrade. The council argued that plans not considered at application stage should not be accepted on appeal.
The roof terrace appeal matters because the Inspector considered Holborn Studios v Hackney and the Wheatcroft principle, found no unfairness to other parties and then applied the revised August 2026 national planning policies to reach a different conclusion from the council. It is a practical example of amendment, neighbour privacy and planning balance operating together.
Why the roof terrace appeal was allowed
The appeal related to Lambeth application 25/03716/FUL. The proposals involved converting loft space for use by the existing flat, adding rooflights towards Handforth Road, creating a rear dormer for access and forming a terrace above the existing rear extension. It was not an appeal for a new separate dwelling, and the Inspector did not grant permission for one.
The revised plans reduced the height of the brick parapet and increased the metal balustrade above it. That was intended to address the authority’s objections to the terrace’s visual bulk. The Inspector made clear that the ordinary approach is for significant changes to be made through a fresh application rather than automatically introduced during an appeal.
The central procedural question was whether the revision changed the essential scheme or prejudiced the people who had considered the original application. The Inspector concluded that the amendment proposed does not alter the fundamental nature of the scheme
. Lambeth and other interested parties had the opportunity to comment on the revised drawing before the determination.
That finding is narrower than a general right to redesign a proposal at appeal. What can be accepted depends on the scale and character of the amendment and whether the people affected have had a fair opportunity to respond. Planning Geek’s guide to options after a planning refusal explains why submitting a revised application and bringing an appeal are distinct routes.
What Holborn Studios and Wheatcroft actually establish
The Inspector expressly referred to the High Court decision in R (Holborn Studios Ltd) v London Borough of Hackney [2017] EWHC 2823 (Admin). That judgment concerns the fairness of dealing with amended proposals, and refined the approach associated with the earlier Bernard Wheatcroft Ltd v Secretary of State for the Environment (1982) 43 P&CR 233 authority.
The distinction is material for applicants. Amended drawings are not always rejected merely because the council did not determine those precise drawings. Equally, an Inspector cannot treat an appeal as an unrestricted opportunity to replace the application or prevent neighbours from commenting on something materially different.
In the roof terrace appeal, the fundamental arrangement remained the same: an existing flat would gain a roof terrace accessed through a rear dormer. The adjustment concerned the design of the surrounding parapet and railings, and the Inspector had the benefit of the parties’ responses. The proposal could therefore be assessed on the amended plans without procedural unfairness.
The case law was used to resolve what evidence and scheme could be considered. It did not decide that the proposed terrace must be granted permission. The Inspector still had to assess design, neighbour amenity and the statutory planning balance on their merits.
A roof terrace that still caused some visual harm
Lambeth’s design guidance discourages alterations to traditional rear returns that lose their subordinate form. Inspector Cryan considered that removing the existing hipped roof of the rear wing and adding the terrace parapet would make the structure appear cumbersome and top-heavy. Lowering part of the brickwork did not eliminate that concern.
Several nearby houses already had roof terraces, but the Inspector did not treat those examples as an automatic justification. In the Inspector’s view, all of them illustrated, to differing degrees, the very form of visual harm the council’s guidance was seeking to avoid. Other terraces on nearby Offley Road sat on existing flat-roofed rear wings and were not directly comparable.
Those distinctions mattered. The proposed rear terrace would be seen largely from neighbouring properties rather than from the public street, while some of its appearance would reflect established alterations in the immediate area. The Inspector still found limited conflict with Lambeth Local Plan policies Q5, Q8 and Q11 concerning design and the character of the area.
The roof terrace appeal was therefore not a case in which the applicant proved every council objection wrong. It succeeded because the acknowledged appearance harm was limited and did not, in the eventual balance, outweigh the development’s benefits under current national planning policy.
Privacy concerns could be controlled
The potential for overlooking was considered separately. The proposed terrace could provide views towards a neighbouring roof terrace, the windows of a nearby rear wing and adjoining gardens. The council had raised concerns about how those new vantage points might affect residential privacy.
A privacy screen between the adjoining terraces was included in the scheme. Although its specification had not been finalised, the Inspector considered that an enforceable planning condition could secure details and installation before the terrace came into use. The decision therefore included a screening condition.
As for views towards nearby windows and gardens, the Inspector placed weight on the steep viewing angles created by the proximity of the rear wings. The densely built urban context, including already elevated terraces in the vicinity, also influenced the assessment of what overlooking could reasonably be expected.
The resulting conclusion was that the proposal would not cause unacceptable harm to neighbouring living conditions. It complied with local policy Q2 on amenity, even though there remained limited design harm. This separation between individual planning issues is one of the useful lessons from the decision.
Why the August 2026 Framework changed the balance
The appeal was determined under the National Planning Policy Framework issued in August 2026. The Inspector referred to the presumption in favour of sustainable development and the policy applying to proposals within settlements. The Inspector also examined policy L2, which attaches substantial weight to additional residential floorspace created through the use of airspace above existing buildings in settlements.
The scheme would provide more living accommodation for the existing flat in an accessible urban location. Although the terrace design was not entirely in keeping with Lambeth’s guidance, the additional residential floorspace was given substantial weight. The Inspector found the national policy benefits were not substantially outweighed by the identified adverse effects.
Consequently, the roof terrace appeal was allowed despite the Inspector’s finding that the proposal conflicted with the development plan taken as a whole. That is an important difference from saying the Inspector found no harm or overruled local design policies as irrelevant. The decision followed a balancing exercise in which those policies still mattered.
What applicants and councils can learn
The result is useful for anyone considering an appeal following refusal of alterations to an existing home. Changing the scheme during an appeal is not inherently prohibited, but fairness, adequate consultation and the degree of alteration are critical. A revised drawing that remains recognisably the same scheme may be treated differently from a proposal that changes its essential character.
It also shows why granting permission can remain possible when an Inspector agrees with part of the council’s criticism. The roof terrace appeal turned on the weight given to limited visual harm, accepted neighbour amenity, additional residential floorspace and the current planning policies, as well as the procedural decision to admit the amended plans.
The Inspector imposed conditions controlling approved drawings, matching external finishes and the privacy screen. The decision concerns appeal 6007246, issued on 12 November 2026 by Inspector M Cryan. The appeal decision is also available on AppealBase. The short Inspector quotation is reproduced from Planning Inspectorate material under the Open Government Licence.
0 Comments