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Official casework recordDismissedCurrent release

Appeal 3324578

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

a first floor rear extension.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    [name]

    The main issues are: • the effect of the proposed development on the character and appearance of the host dwelling and of the area; and • whether the proposal would create satisfactory living conditions for its future occupiers with regard to outdoor space.

  3. Section 04

    Character and appearance

    The appeal site comprises a two-storey detached dwelling, which has been substantially extended to the rear. In addition, there is a large outbuilding located in the rear garden taking up a significant proportion of the plot.

    The roofscape in the vicinity is varied and includes elements such as hipped roofs, cat slides and gables. The site lies on the corner of [address] and [address] and, as such, it occupies a prominent position with its side and rear elevations visible within the street scene of [address]. The back of the adjoining plots are also visible in this street scene and some dwellings have been enlarged with ground and first floor rear extensions.

    The proposed development would be substantial in size, thereby failing to appear as a subservient addition to the host dwelling. Due to the extension’s significant width, the design of the hipped roof would create a disparity of angles with the pitch of the main roof. Consequently, the roof form would appear convoluted and fail to reflect the existing architectural detailing of the host dwelling.

    The proposal would be prominent in views within [address]. Given its bulk and design, it would be markedly at odds with the less substantial amount of built form in the rear of neighbouring properties, including the first-floor rear extension at [address] (No 80). That extension is not as substantial in size as the proposal and, in addition, it maintains the roof slope of its host dwelling. For these reasons, the proposal would not be justified by the extension at No 80.

    The proposal would not be detrimental to the living conditions of the adjoining neighbours. However, the lack of harm is a neutral consideration of this appeal.

    In conclusion, the proposal would be harmful to the character and appearance of the host dwelling and of the area. The proposal would conflict with Policies DMHD1, DMHB11 and DMHB12 of the Local Plan Part 2 - Development Management Policies (DMP), Policy BE1 of the Local Plan Part 1 - [name] 2012 and Policies D4 and D8 of the London Plan 2021, where these policies support high quality design that integrates well with the surrounding area. The proposal would also be contrary to the National Planning Policy Framework, which promotes developments that are visually attractive and sympathetic to local character.

  4. Section 05

    Living conditions

    The site retains some space to the rear which is laid to hardstanding and appears to be used for parking. Nevertheless, the space remains available and, as such, the increase in number of bedrooms would not reduce the standard of accommodation. In addition, the site is well located in relation to public amenity space.

    On this basis, the proposal would create satisfactory living conditions for its future occupiers with regard to outdoor space. As such, it would not conflict with Policy DMHD1 of the DMP, which amongst other criteria, requires that adequate garden space is retained when dwellings are extended.

  5. Section 06

    Conclusion

    Overall, I conclude that the proposal conflicts with the development plan as a whole and there are no material considerations of sufficient weight to indicate that a decision should be made otherwise than in accordance with it. Therefore, 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 5985No official casework-database value to compare
    Extracted decision date · page 1
    6 November 2023Matches the official casework database
    Extracted site visit dates
    3 October 2023 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
3324578
Application reference
29767/APP/2023/435
Lead case reference
Not recorded
Planning authority
London Borough of Hillingdon
Planning authority code
E09000017

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
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
21 June 2023
Valid date
19 July 2023
Start date
21 August 2023
Planning authority decision date
14 June 2023
Appeal decision date
6 November 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
41483
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