Appeal 3360818

The appeal is dismissed.

The site visit was undertaken by a representative of the Inspector whose recommendation is set out below and to which the Inspector has had regard before deciding the appeal.

Under Article 3 and Schedule 2, Part 1, Class AA of the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended (the GPDO), planning permission is granted for the enlargement of a dwellinghouse by the construction of additional storeys, subject to specific limitations and conditions and a requirement that the developer applies for prior approval to the Local Planning Authority.

There is no dispute between the parties that the proposal would comply with the limitations in paragraph AA.1 and the conditions in paragraph AA.2. (2) of Class AA. There is also no dispute with regard to the prior approval matters in paragraph AA.2.(3)(a)(i), (iii) or (iv). From the evidence before me I see no reason to disagree.

The decision notice includes references to policies of the development plan. The principle of development is however established through the grant of permission by the GPDO, and I am required to assess the proposal as a prior approval application as set out within the parameters of the GPDO. Regard can be given to development plan policies insofar as they are material considerations; however, they are not in themselves determinative.

The GPDO requires that regard must be given to the National Planning Policy Framework (the Framework) in prior approval cases so far as relevant to the Appeal Planning Officer APP/W5780/D/25/3360818 subject matter of the prior approval, as if the application were a planning application.

I am also dealing with an appeal for an additional storey at [address] (APP/W5780/D/25/3360816). This is the subject of a separate decision, however as they are located close together there will be some similarities in elements of the report.

The main issue is the effect of the proposal on the external appearance of the dwellinghouse.

The courts have held that external appearance is a matter of planning judgment and that building design and relationship with adjoining or nearby properties and street context may be considered if relevant.

The appeal site comprises one half of a pair of semi-detached dwellings in a cul-de-sac. The uphill gradient of the street means the ridge lines of the appeal site and its neighbouring properties steadily ascend up the slope. There are some variations in external material and colour in the street, however, dwellings are consistent in scale and size. Properties in this cul-de-sac are different in appearance to those in the wider area, and this gives [address] a distinct and enclosed pocket of character. While greater height differences between properties exist in some instances in the wider surrounding area, the stepped roof line of dwellings in [address] is consistent and contributes to its distinctive character.

The proposed additional storey would create a noticeable increase in the height of the appeal dwelling, altering the symmetry with its semi-detached pair and interrupting the existing staggered roofscape. The appeal property’s ridge line is lower than its non-attached neighbour No 46, however the proposed change in height would still create a much larger difference in ridge height than is characteristic in this street scene. The position of the appeal property at the beginning of the slope and near the entrance to the cul-de-sac would make it clearly visible.

In this context, the proposed development would appear as a jarring and obtrusive disruption to the rhythm of the roofscape and the street scene. While the proposal would use matching materials and detailing, due to the increased height it would fail to maintain the strong sense of place in [address] and would not add to the overall quality of the area or be sympathetic to local character.

The proposed upward extension would increase the appeal dwelling to a height that exists in the wider area but not within the immediate cul-de-sac, where the modest and consistent size of properties is a significant and distinctive characteristic of development. I also noted that comparable building heights nearby, particularly on [address] and [address] were sited at one end of the street, rather than in the middle, such that the height difference did not appear as jarring.

The appellant has drawn my attention to other upward extensions which have been granted by the Council or on appeal. However, these are located quite a distance from the appeal site, so understandably the nature of each property and its Appeal Planning Officer APP/W5780/D/25/3360818 contextual surroundings will differ case to case. In those where the Council granted prior approval, its assessment was limited to the appearance of the dwelling in isolation. These all pre-date the court judgement which clarifies that the wider context of the site can be considered, and therefore it is now possible to consider external appearance with a wider scope than at the time of those decisions.

In terms of the appeal decisions, the upward extension granted at [address] was on a detached property screened by trees. The appeal decision for [address] factors in the property’s end-terrace position and larger properties adjacent in its assessment of visual impact, in contrast to the appeal site where the taller flats behind are only glimpsed in gaps between properties. At [address] the Inspector took into account large dormers on other properties and another upward extension nearby, neither of which is the case here. Consequently, these other examples are not comparable to the appeal proposal and do not justify granting prior approval.

The Framework supports upward extensions subject to development being consistent with the prevailing form of neighbouring properties and the overall street scene and being well designed. For the reasons above, the proposal would not achieve this. Consequently, the proposal would harm the external appearance of the dwellinghouse and would not comply with the Framework policies in relation to design, which are relevant to this prior approval matter.

I have taken into account Policies LP26 and LP30 of the Redbridge Local Plan 2015 – 2030 (adopted 2018) which promote improvements in keeping with local character and so are material in this case. [name] have concluded that the proposal would harm the external appearance of the dwellinghouse, it would conflict with these policies.

The appellant has referred to benefits of the scheme including optimising use of the site and modernising the property. These are not however matters I can consider in a prior approval appeal as there is no provision for any type of balancing exercise under this procedure.

For the reasons given above and having had regard to all other matters raised, I recommend that the appeal should be dismissed.

I have considered all the submitted evidence and my representative’s report and agree with the reasoning. On that basis the appeal is dismissed.