Appeal 3307846
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Official decision document
The decision, section by section
7 sections
Read the development description and the Inspector’s text from the official decision PDF in source order. Source headings are retained where available. Personal and contact details are removed by an automated privacy filter; this is source material, not Rules for You analysis.
Section 01
Development description
prior approval for construction of one additional storey to the property with a maximum height of 2.7m.
Section 02
Decision
The appeal is dismissed.
Section 03
Procedural Matters
The description of development has been taken from the Council’s decision notice in the interests of clarity. This is reflected in the banner heading of this decision letter and the appeal has been decided accordingly.
Under Article 3(1) and Schedule 2, Part 1, Class AA of the GPDO planning permission is granted for enlargement of a dwellinghouse by construction of additional storeys subject to limitations and conditions.
[name].2.(3)(a)(ii)(aa) sets out that before beginning the development, the developer must apply to the local planning authority for prior approval as to the external appearance of the dwellinghouse, including the design and architectural features of the principal elevation of the dwellinghouse.
The principle of development is established by the GPDO, and I have only had regard to policies in the development plan and the National Planning Policy Framework (the Framework) insofar as they are relevant to making a planning judgement on matters of prior approval.
Section 04
Main Issue
The main issue is the effect of the proposal on the character and appearance of the area.
Section 05
Reasons
The site is located at [site address] in Windsor. The existing dwelling is a detached bungalow of modest proportions, and its design closely reflects that of other detached bungalows along this side of the street. Indeed, it is clear from the evidence presented and from my site visit that the bungalows along this side of the street share fundamental design language1. This generates a significant degree of uniformity that makes a positive contribution to the character and appearance of the area.
The opposite side of the street is characterised by larger dwellings that are two storeys in height. Again, these larger two storey dwellings share fundamental design language, which also generates a significant degree of uniformity along their respective side of the street. Consequently, uniformity has a clear role to play in the broader street.
The proposal would deliver an additional storey to the existing dwelling. This would fundamentally change its scale to the extent that it would be incongruous with the uniform context of other bungalows along this side of the street. Consequently, it would look out of place and jarring. Altogether, and notwithstanding the retention of materials and roof profile associated with the existing dwelling2, the proposal would harm the character and appearance of the area.
I note the appellant’s evidence demonstrating variation in the design of dwellings behind the site. However, these are part of a different street scene and do not inform the context within which the proposed changes to the principal elevation of the existing dwelling need to be assessed. [name] accept the appellant’s contention that an increase in scale under Class AA is inevitable due to its inherent provisions, such increases in scale need to occur in an appropriate context, in accordance with the relevant matters of prior approval.
The Council contend that the proposal would be cramped against the eastern boundary of the site. However, I am not persuaded that this would be the case because the proposal respects the pattern of development. Indeed, whilst it increases the height of the existing dwelling it maintains the gap between neighbouring dwellings. Notwithstanding, this does not change my conclusion on harm to the character and appearance of the area derived from other aspects of the proposals design.
Section 06
Other Matters
Regulation 9 of the Conservation of Habitats and Species Regulations 2017 imposes a duty on decision makers to consider relevant directives and whether there is a reasonable likelihood of [name] being present and affected by development that is said to be permitted development in a prior approval appeal. I am mindful of guidance3 which states that developers should not be required to undertake surveys for protected species unless there is a reasonable likelihood of the species being present and affected by the development. 1 Notwithstanding some limited variation in the finer architectural details that have resulted from neighbouring alterations 2 And indeed, any other matters of prior approval not disputed by the Council 3 Paragraph 99 of Circular 06/2005 Biodiversity and Geological Conservation – Statutory obligations and their impact within the planning system
In this context, there is limited evidence from either party in relation to the reasonable likelihood of [name] being present and affected by the development. However, as I am dismissing the appeal on the basis of prior approval matters, there is no prospect of development affecting [name] and it is not necessary to make a finding either way as it would make no difference to my decision.
The appellant has cited another decision4 made by the Council at [address]. Whilst similar on its face, the location of the development is towards the end of the street and in proximity to a junction with significant vegetation along the boundaries. Consequently, it is less prominent compared to the proposal in this case, which sits in the middle of a uniform row where changes would be clearly perceptible in the street scene. Consequently, in considering the different contexts, I have given the other decision limited weight.
The appellant has cited another appeal decision5 in support of the proposal. However, the inspector’s reasoning focussed on the variety in the type of buildings in the area, unlike in this case where the uniformity and positive contribution to the character and appearance of the area is fundamental. Consequently, I have given the other appeal decision limited weight.
Section 07
Conclusion
For the reasons given above, the proposal would harm the character and appearance of the area and prior approval cannot be granted in accordance with relevant limitations and conditions of the GPDO under [name].2.(3)(a)(ii)(aa). Consequently, the appeal is dismissed.
Planning inspector and document dates
The official casework attribution is grouped under a one-way keyed hash and shown only by its local identifier. Decision-letter dates and page references are extracted by fixed first-page rules and checked against that authoritative record.
Appeal Decision
- Extracted inspector · page 1
- Inspector attribution ID 415No official casework-database value to compare
- Extracted decision date · page 1
- 1 February 2023Matches the official casework database
- Extracted site visit dates
- 20 January 2023 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3307846
- Application reference
- 22/01745
- Lead case reference
- Not recorded
- Planning authority
- Royal Borough of Windsor and Maidenhead
- Planning authority code
- E06000040
Casework details
The casework, procedure, development and linking details supplied by the official record.
- Casework type
- Householder (HAS)
- Procedure
- Written Representations
- Development type
- Householder developments
- Appeal type reason
- 3. Refused prior approval of permitted development rights
- Appeal reason
- Refusal
- Type detail
- Planning Appeals - Full
- Jurisdiction
- Transferred
- Link status
- Not Linked
Site and development
Published appeal-site measurements and planning designations, without the withheld precise location fields.
- Site area
- Not recorded
- Floor space
- Not recorded
- Number of residences
- 0
- Site in Green Belt
- No
- Agricultural holding
- No
- Affects setting of a listed building
- Not recorded
- Historic building grant made
- Not recorded
- Relates to a conservation area
- Not recorded
- Flooding is an issue
- Not recorded
- Site within an AONB
- Not recorded
- Site within an SSSI
- Not recorded
Decision and dates
The published outcome and every imported case date.
- Official decision
- Dismissed
- Decision category
- Dismissed
- Received date
- 28 September 2022
- Valid date
- 28 September 2022
- Start date
- 11 January 2023
- Planning authority decision date
- 24 August 2022
- Appeal decision date
- 1 February 2023
Case administration
Published recovery, call-in, costs and enforcement information for this case.
- Redetermined
- No
- Bespoke
- No
- Date recovered
- Not recorded
- Date not recovered or derecovered
- Not recorded
- Call-in date
- Not recorded
- Costs applied for
- Not recorded
- Enforcement grounds count
- Not recorded
- Enforcement grounds
- Not recorded
Source and catalogue history
When this record appeared in the rolling official release and when the catalogue stored it.
- Source
- Planning Inspectorate casework database
- Source data system
- Horizon
- Dataset status
- Current release
- Catalogue record ID
- 27428
- First seen
- 20 August 2026 at 14:24
- Last seen
- 20 August 2026 at 16:26
- Removed from release
- Not recorded
- Record created
- 20 August 2026 at 14:24
- Record updated
- 24 August 2026 at 16:21