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Official casework recordDismissedCurrent release

Appeal 6006787

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

4 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 outbuilding to rear garden for use as an annexe.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    [name]

    The main issues in this case are: i) the effect of the proposed building on the character and appearance of the appeal property and the surrounding area; ii), as a building capable of being an independent, self-contained residential unit, the effect it would have on the character and appearance of the area, and the amenity of neighbouring occupants/residents; and iii) whether it would provide acceptable living conditions for occupants.

  3. Section 04

    Reasons

    The appeal site is a two-story semi-detached house, which has had a loft conversion with a rear dormer. The proposed annexe would be sited on the rear boundary of the garden. There is a three-story block of flats to the rear and a number of trees along the boundary of No.6 [name]. The surrounding area is predominantly residential. The location plan for the site shows a rear access running from [address] next to No.2, and along the back of the residential gardens ending at the rear of the appeal site. However, at my site visit I saw that this was gated and locked, and there was no means of access from the appeal site to this track.

    There are a number of single-storey outbuildings in the rear gardens of houses in the vicinity, but nothing that represents a development on the scale as proposed in this appeal. In this situation, the proposed two-story building would have a substantial presence in the locality, with a large footprint. It would appear incongruous in the surroundings. The accommodation in the building would consist of a garden room and study on the ground floor with WC accommodation. On the first floor there would be a bedroom and bathroom/utility room. Whilst there is no kitchen facility shown on the drawing, it would be capable of providing such provision in the floor area that would be provided. It would be capable of independent occupation.

    There would be a separation distance of some 17m with the host dwelling and a similar distance from Nos. 6 and 10. The use of the proposed building as an independent dwelling, having no separate private space, would be likely to lead to noise and general disturbance and a loss of privacy. The proposal would therefore have an adverse effect on the character and appearance of the garden side of the adjacent dwellings, and the living conditions of the occupants. The appellant’s appeal statement describes the proposal as a novel singular visual and physical presence. That would be true, and reinforces my conclusion on the effects of the proposal. There is no explanation of a private need for the annexe which could be considered against the public harm that would result from the proposed development.

    For these reasons the proposed building would have an adverse effect on the character and appearance of the appeal property and the surrounding area, and the living conditions of neighbouring residents. It would also fail to provide acceptable living conditions for future occupiers due to lack of privacy and lack of private outdoor space.

    It is necessary to consider whether a satisfactory permission could be given with the use of a planning condition, such as one requiring that the building only be occupied as ancillary accommodation to the host dwelling. However, this would be difficult to monitor and for that reason would not be a reasonable, and unlikely to avoid public harm.

    For these reasons, the appeal will 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 129No official casework-database value to compare
    Extracted decision date · page 1
    28 May 2026Matches the official casework database
    Extracted site visit dates
    12 May 2026 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
6006787
Application reference
1782/APP/2025/2173
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
Not recorded
Appeal reason
refused
Type detail
Householder
Jurisdiction
No Jurisdiction Associated
Link status
Not recorded

Site and development

Published appeal-site measurements and planning designations, without the withheld precise location fields.

Site area
0 hectares
Floor space
305 m²
Number of residences
Not recorded
Site in Green Belt
No
Agricultural holding
Not recorded
Affects setting of a listed building
Yes
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
20 March 2026
Valid date
20 March 2026
Start date
27 March 2026
Planning authority decision date
6 January 2026
Appeal decision date
28 May 2026

Case administration

Published recovery, call-in, costs and enforcement information for this case.

Redetermined
Not recorded
Bespoke
Not recorded
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
Back Office
Dataset status
Current release
Catalogue record ID
89484
First seen
20 August 2026 at 14:25
Last seen
20 August 2026 at 16:29
Removed from release
Not recorded
Record created
20 August 2026 at 14:25
Record updated
24 August 2026 at 16:21