Appeal 3348899
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
the construction of a loft conversion with rear dormer and the erection of a ground floor rear extension.
Section 02
Decision
The appeal is dismissed
Section 03
[name]
The main issues are the effect of the proposed rear dormer on the character and appearance of No [site address] and whether, after the construction of the rear extension, the remaining private amenity space would be adequate.
Section 04
Dormer – Character and Appearance
The proposed dormer, at about two thirds of the width of the house, set down from the ridge and above the eaves, would comply with the strict dimensional limits of Policy DMHD1 of the adopted Hillingdon Local Plan (HLP). It would also be invisible in frontal views from [address].
However, it would be the only dormer in the terrace, and readily seen from many properties in the residential area to the rear. From there, it would appear as an incongruous addition, out of keeping with the terrace as a whole and harmful to its currently simple and harmonious character and appearance.
For this reason, the proposed dormer would be in unacceptable conflict with Policies BE1 and DMHB11 of the HLP. as well as D3 of the adopted London Plan, which, together, require high quality design in the built environment for new construction, including home extensions, to integrate well in the surrounding area.
Section 05
[name] – [name]
The rear extension too, at 3.3m deep, would comply with the dimensional limit of Policy DMHD1.
Importantly, however, its presence would reduce the existing area of private amenity space at the rear of the dwelling from about 48sqm to some 32sqm. That is compared with the requirement of Policy DMHB18 of the HLP for 2- and 3-bedroom dwellings to have 60sqm of private amenity space. Even the present rear yard, or garden, would not appear to comply with this standard. By increasing the number of bedrooms from two to three, compliance with the policy minimum is logically more important. In my view, therefore, the remaining private amenity space would be inadequate and in unacceptable conflict with Policy DMHB18.
Section 06
Conclusion
The development plan provisions I have cited above are essentially consistent with national policy and, for the reasons given, I regard the proposed dormer and rear extension together as failing to comply with the development plan as a whole.
Accordingly, I conclude that this 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 1576No official casework-database value to compare
- Extracted decision date · page 1
- 21 March 2025Matches the official casework database
- Extracted site visit dates
- 11 March 2025 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3348899
- Application reference
- 77124/APP/2024/1256
- 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
- 40 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
- 26 July 2024
- Valid date
- 28 August 2024
- Start date
- 19 September 2024
- Planning authority decision date
- 5 July 2024
- Appeal decision date
- 21 March 2025
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
- 66630
- First seen
- 20 August 2026 at 14:25
- Last seen
- 20 August 2026 at 16:28
- Removed from release
- Not recorded
- Record created
- 20 August 2026 at 14:25
- Record updated
- 24 August 2026 at 16:21