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Official casework recordDismissedCurrent release

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

  1. Section 02

    Decision

    The appeal is dismissed.

  2. 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.

  3. 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.

  4. 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.

  5. 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