Appeal 3306212
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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.
Section 02
Decision
The appeal is dismissed.
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.
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.
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.
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.
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