Appeal 3334348
Public case and site metadata stored from the official casework database, including fields that were empty in the source release.
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Official decision document
The decision, section by section
6 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
First floor rear extension
Section 02
Decision
The appeal is dismissed.
Section 03
Main Issue
The main issues is the effect of the proposal on the living conditions of neighbouring occupiers of 17 The Mount and occupiers of properties on Park View, with particular reference to outlook, privacy, natural light, light spill, and whether the proposal would prejudice future development of 17 The Mount.
Section 04
Reasons
The appeal property is a two storey semi-detached house located at the end of a suburban residential street. The appeal property’s eastern boundary adjoins the rear gardens of 77, 79 and [address], which are two storey semi-detached properties. Its western boundary is shared with 17 The Mount, a detached two storey house. - Privacy
The proposal would involve the installation of a new side facing window to serve an existing bedroom. This would allow views towards the rear elevations and gardens of 77 and [address]. Due to the orientation and proximity to the shared boundary, views from this window would enable a level of overlooking which would significantly diminish the privacy of 77 and 79’s rear gardens and within the nearest habitable rooms.
The window in question would be the sole window to the bedroom. A condition requiring obscure glazing to be used for this window would not be appropriate in this instance as it would remove any outlook from the room. This would have a harmful impact on the future occupiers of the proposal.
In coming to this conclusion, I have noted these properties already experience a degree of mutual overlooking, and indeed have windows which currently look towards the appeal property. However, the new side facing window would introduce overlooking towards the Park View properties from a direction from which they are not currently overlooked. This would be harmful to the neighbouring occupiers’ living conditions. - Daylight, sunlight and light spill.
The proposed extension would be sited in close proximity to the shared boundary with 17 The Mount, which has a conservatory constructed up to the boundary.
The proposed extension would project from the host property in close proximity to the boundary with No. 17. The presence of an extension of this depth, height and with limited separation from No. 17 would be likely to overshadow the neighbouring property’s conservatory during the morning period, and potentially for longer periods during the winter months.
Overall, in the absence of substantive evidence to demonstrate otherwise, I find that the extension, due to its height, depth and proximity, would reduce the amount of daylight and sunlight reaching the neighbouring accommodation. This would have a harmful effect on the living conditions of neighbouring occupiers.
I have had regard to the Council’s Residential Design Supplementary Planning Document (2013) (SPD) which requires that adequate daylighting and sun lighting of neighbouring properties should be maintained.
Given the proposal’s location to the rear of the gardens of properties on Park View, combined with its separation from this shared boundary, I do not find that it would have a harmful impact on the levels of daylight and sunlight within these properties.
The Council has also raised light spill to the neighbouring occupiers as part of the reason for refusal. As the proposal would not involve particularly large areas of glazing, I find it unlikely that light spill within this suburban area, which is illuminated with streetlights, would be harmful to the living conditions of the occupiers of the adjacent properties. - Outlook
Views of the proposal would be possible from the rear windows and gardens of 77, 79 and [address]. However, the proposal would have a hipped roof and would be set back away from the boundary with these properties. Furthermore, the existing vegetation on the shared boundary with No. 77 is likely to filter some views of the proposal. Consequently, the proposed development, as a result of its siting and relationship with the neighbouring properties’ rear gardens, would not have an adverse impact on the living conditions of neighbouring occupiers of 77, 79 and [address] in particular reference to outlook. - Future development
The Council are concerned that the new window to bedroom 2 would face the blank side elevation of 17 The Mount, and would prejudice future development at this property. The window in question would be set in several metres from the shared boundary with The Mount. There is no evidence of any pending applications for development at that site, or others nearby. On the basis of the evidence before me in relation to this appeal, I find that there are insufficient grounds to conclude that the proposal would unreasonably prejudice future development.
However, that does not alter my other concerns regarding the development, as set out above, and I conclude that the proposed extension would harm the living conditions of the occupiers of 17 The Mount with particular reference to loss of daylight and sunlight, and the occupiers of 77 and [address] with particular reference to privacy. It would therefore conflict with Policies CS8 and DM10 of the Local Development Framework Core Strategy (2012). Amongst other aspects, these policies seek to protect the living conditions of occupiers of neighbouring properties from a loss of natural light and privacy.
As set out above, the design would also conflict with the SPD guidance in relation to the design of first floor rear extensions.
Section 05
Other Matters
It has been put to me that other extensions to properties within the local area have set a precedent for small extensions to properties. However, during my site visit I did not observe any first floor extensions which were similar to the appeal proposal. In any event, this proposal has been assessed on its own merits.
Concern has been raised in relation to the Council’s handling of the planning application. This is a matter that, if necessary, should be raised with the Council away from this appeal. In any event, this concern would not lead me to alter my findings.
Section 06
Conclusion
For the above reasons, having had regard to the development plan as a whole, along with all other relevant material considerations, I conclude that the appeal should be 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 3395No official casework-database value to compare
- Extracted decision date · page 1
- 22 February 2024Matches the official casework database
- Extracted site visit dates
- 14 February 2024 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3334348
- Application reference
- 23/01239/HOU
- Lead case reference
- Not recorded
- Planning authority
- Royal Borough of Kingston Upon Thames
- Planning authority code
- E09000021
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
- 1. Refused planning permission
- Appeal reason
- Refusal
- Type detail
- Unknown
- 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
- Not recorded
- 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
- 3 December 2023
- Valid date
- 3 December 2023
- Start date
- 22 January 2024
- Planning authority decision date
- 11 September 2023
- Appeal decision date
- 22 February 2024
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
- 46982
- First seen
- 20 August 2026 at 14:24
- Last seen
- 20 August 2026 at 16:27
- Removed from release
- Not recorded
- Record created
- 20 August 2026 at 14:24
- Record updated
- 24 August 2026 at 16:21