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Official casework recordDismissedCurrent release

Appeal 3306212

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

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

the erection of a rear conservatory extension.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    Main issues

    The main issues are the effect of the proposed development firstly, on the character and appearance of the host building and the local area; and secondly, on the living conditions of the occupiers of [address] with particular regard to sense of enclosure and light.

  3. Section 04

    Reasons

    The appeal property is a mainly 2-storey semi-detached house that stands within a row of dwellings on one side of [address]. In the vicinity of the site, properties are broadly similar in age, with some variety in their scale, design and general appearance. Consequently, the existing built form varies within the local area to which No 356 belongs.

    The new conservatory would attach to the back wall of the existing flat roof rear extension and project outwards by 3-metres. The combined length of the existing extension and the new conservatory from the original back wall of No 356 would be almost double the limit of 3.65 metres for additions of this type that is advised in the Council’s Residential Extension Guidelines Supplementary Planning Document (REG). Like the rear extension to which it would attach, the proposal would also extend across the entire width of the main house.

    In that context, the appeal scheme could not reasonably be described as a subordinate addition, which is expected of development proposals under Policy SC7 of the Council’s Local Plan 2015-2030 (LP). The overall scale and depth of the existing and proposed rear extensions would cause them to visually dominate the back of the main house. There would also be an awkward juxtaposition of rooflines between the existing and proposed extensions given their sharply contrasting eaves levels and roof forms. As a result, the intrinsic character of the host building would be spoilt with the new built form in place even with the use of matching external materials.

    The new conservatory would not be readily visible from public vantage points given its position at the back of No 356, away from the road. Nevertheless, the appeal scheme would be evident from the rear gardens of the adjacent properties. From these vantage points, the proposal would draw the eye as an unsympathetic extension that would be out of keeping with the visual character of the host building and the local area.

    I observed that some properties in the same row as No 356 have relatively large rear extensions, to which the appellant has referred and provided aerial photographs. These examples have blended into the local area and respected their host building with varying degrees of success. These cases serve to illustrate that such changes can have a significant impact on the character and appearance of the building and the area to which they belong. None of the examples that I saw involved a conservatory linked to a flat roof rear addition, as proposed. In any event, I have assessed the proposal on its own merits.

    On the first main issue, I conclude that the proposed development would cause significant harm to the character and appearance of the host building and the local area. As such, the proposal conflicts with [name] CC1, CC2 and SC7 and the guidance within the REG. These policies and guidance aim to ensure that development complements the original building and maintains the character of the local area.

  4. Section 05

    Living conditions

    The side elevation of the new conservatory would be up to and parallel with the shared rear boundary with the attached property, which is [address]. The new side wall would partly enclose the back garden of No 354 and project above the boundary fence and so the upper part of the proposal would be evident from both here and through the rear windows.

    From what I saw, No 354 has been extended at the rear with its main back wall broadly aligning with that of the appeal dwelling. Consequently, when seen from the rear of this neighbouring property, the proposal would appear modest in depth. The main direction of outlook from the rear-facing windows of No 354 across its long rear garden would not be significantly affected. Furthermore, because the rears of No 354 and 356 face northwest, the loss of natural light due to the proposal would be modest in both duration and extent.

    In summary, the new conservatory would be close to the rear of No 354. However, neither its height nor depth would cause the appeal scheme to unduly heighten a sense of enclosure nor result in an appreciable loss of light. Hence, the living conditions of the occupiers of No 354 would not be materially reduced. Accordingly, the proposal does not conflict with [name] CC1, CC2 or SC7 or the REG insofar as they aim to safeguard residential amenity.

    For the same reason, the new development accords with the National Planning Policy Framework, which states that development should ensure a high standard of amenity for all users. My favourable finding on this second issue does not outweigh the significant harm that I have identified in relation to the effect of the proposal on the character and appearance of the local area.

  5. Section 06

    Other matters

    The appellant and his family have experienced several break-ins at the appeal dwelling. I note that the Police has advised that providing a further barrier to restrict access into the property could potentially deter future incidents. I have considerable sympathy for these personal circumstances, which can be unsettling. However, there is nothing before me to indicate that the only way to improve the security of the property and enhance the safety of the appellant and his family is to erect a conservatory, as proposed.

    Reference is made to a recent appeal decision1 at [address], which granted prior approval for a single storey rear extension. Since the procedure followed in that case differs with the proposal before me, the assessment was confined to a single issue: the living conditions of the occupiers of adjoining premises. It is not directly comparable with the development sought here and so I attach only very limited weight to the decision at No 358 in support of the appellant’s case.

  6. Section 07

    Conclusion

    For the reasons set out above, 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 287No official casework-database value to compare
    Extracted decision date · page 1
    2 March 2023Matches the official casework database
    Extracted site visit dates
    29 November 2022 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
3306212
Application reference
00505/356/P4
Lead case reference
Not recorded
Planning authority
London Borough of Hounslow
Planning authority code
E09000018

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
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
16 m²
Number of residences
1
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
1 September 2022
Valid date
1 September 2022
Start date
19 October 2022
Planning authority decision date
12 July 2022
Appeal decision date
2 March 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
No
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
29131
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