Appeal 3335795
Public case and site metadata stored from the official casework database, including fields that were empty in the source release.
A clearer next step
See how Inspectors approached issues like yours
Bring your planning decision into a private workspace. We separate the disputed points, then match them with source-located Inspector reasoning from similar appeals.
- See which issues the decision appears to turn on
- Compare the facts and open the full appeal records
One private comparison
How the refusal review worksOne-off service · No subscription
Similar appeals are evidence to inspect, not a prediction of your outcome.
Official decision document
The decision, section by section
5 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 single storey rear extension.
Section 02
Decision
The appeal is dismissed.
Section 03
Background and main Issue
The main issue is whether the appeal proposal constitutes development permitted under the provisions of Schedule 2, Part 1, Class A of the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) (the GPDO).
Section 04
Reasons
The appeal site comprises a chalet style detached dwelling. The original house included a central rear outrigger at ground floor. This was removed to enable the construction of a full width single storey rear extension pursuant to a planning permission in 20101 (the 2010 extension).
The appeal proposal is for a single storey rear extension to be joined to the 2010 extension. The proposed addition would be the width of the original outrigger.
Under paragraph A.1.(ja), development is not permitted where any total enlargement (being the enlarged part together with any existing enlargement of the original dwellinghouse to which it will be joined) exceeds or would exceed the limits set out in sub paragraphs (e) to (j).
The total enlargement comprises the proposed extension and the 2010 extension. The total enlargement would therefore be a full width rear extension including a central projecting element.
[name].1.(j) concerns the enlargement of a dwellinghouse extending beyond the original wall forming a side elevation of the original dwellinghouse. 1 Reference 10/00673 The side elevations of the original central outrigger would have formed part of the original side elevations of the house. As the total enlargement would create a full width extension, it would not comply with the restriction set out in A.1.(j)(iii) which requires any enlargement not to be greater than half the width of the original dwellinghouse.
The appellant’s point that only the 2.29m extension either side of the original outrigger should be considered in determining whether the extension is half the width or less than the original house does not align with the requirements of paragraph A.1. (ja) and the advice contained within the ‘Permitted development rights for householders - Technical Guidance’ (September 2019) where it is clear that the entirety of the total enlargement should be considered against the limits set out in A.1. (e) to (j).
Section 05
Conclusion
The proposed extension would not constitute development permitted under the GPDO. The appeal should therefore 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 5181No official casework-database value to compare
- Extracted decision date · page 1
- 7 August 2024Matches the official casework database
- Extracted site visit dates
- 24 July 2024 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3335795
- Application reference
- 23/02503
- Lead case reference
- Not recorded
- Planning authority
- Royal Borough of Windsor and Maidenhead
- Planning authority code
- E06000040
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
- 3. Refused prior approval of permitted development rights
- Appeal reason
- Refusal
- Type detail
- Unknown
- 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
- 32 m²
- Number of residences
- 0
- 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
- 20 December 2023
- Valid date
- 7 January 2024
- Start date
- 28 February 2024
- Planning authority decision date
- 20 November 2023
- Appeal decision date
- 7 August 2024
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
- 55192
- 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