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Official casework recordDismissedCurrent release

Appeal 3374148

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

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

single storey rear extension 6m.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    Main Issue

    The main issue is whether or not the proposal constitutes development permitted under Schedule 2, Part 1, Class A of the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) (‘the GPDO’).

  3. Section 04

    Reasons

    Schedule 2, Part 1, Class A of the GPDO contains a permitted development right for the enlargement, improvement or other alteration of a dwellinghouse. This right is subject to certain limitations and conditions. Of these, the Council considers that the proposal would be contrary to the limitations at paragraphs A.1(j) and A.1(ja).

    [name].1(j) provides that development is not permitted if the enlarged part of the dwellinghouse would extend beyond a wall forming a side elevation of the original dwellinghouse and would, amongst other things, have a width greater than half the width of the original dwellinghouse. The term ‘original’ is defined in the GPDO as meaning, in essence, as existing on 1st July 1948, or if built after this date, as so built.

    [name].1(ja) additionally requires that any total enlargement, being the proposed enlarged part together with any existing enlargement of the original dwellinghouse to which it would be joined, must not exceed the limits in sub-paragraphs including A.1(j).

    The proposed rear extension would span the full width of the two-storey part of the appeal dwelling, replacing existing projections which comprise a single-storey flat-roof projection across most of the rear elevation, and a shallower rear projection with a sloping roof closest to the boundary with the adjoining neighbour at [address].

    The Council considers that the shallower projection on the boundary with No 9 is part of the original dwelling as shown by historic maps for the property, but the appellant disagrees and asserts that the rear wall of the dwelling was flush with no projections. In support of this position, the appellant has provided a copy of a land registry plan date stamped 1956. However, and leaving aside that this plan post-dates 1948 and so would not necessarily indicate the ‘original’ dwelling for the purposes of the GPDO, land registry plans are intended to show the general position of boundaries. Accordingly, they are somewhat generalised and may not capture the full detail of buildings as would be shown on large-scale [name] historic mapping which I consider would offer a more reliable representation and which I would generally expect to be provided to demonstrate the historic arrangement of a building where this is contested.

    Given the relatively modest width and depth of the shallower rear projection on the boundary with No 9, it is not improbable that it could have been omitted from mapping underpinning the land registry plan. In my view, this plan is not therefore compelling evidence that the rear elevation of the original dwelling was flush.

    Moreover, the appellant’s appeal submission includes a document named ‘[name] which appears to be an extract of a larger-scale [name] map. This is not dated, but illustrates a stepped rear elevation to the appeal dwelling, with a less deep section closest to the boundary with [address] which appears broadly consistent with the arrangement that I observed on site. However, it also shows matching small outriggers either side of the common boundary to the rear of the adjacent pair of dwellings at 3 and [address], similar to the shallower projection to the appeal dwelling. Insofar as Nos 3 and 5 are of generally similar overall form, design and layout to Nos 7 and 9, they appear to be contemporaneous and the illustration of the outriggers on the boundary suggests to me that this could well have been an original feature of the dwellings here. In my view, this adds weight to the Council’s argument that the shallower projection to the appeal dwelling is part of the original dwellinghouse.

    On the strength of the evidence that is before me in this appeal, I am not persuaded that the shallower projection on the boundary with No 9 can reasonably be determined to be non-original and I find on the balance of probability that it should instead be considered to be part of the original dwelling.

    Insofar as the proposed development would extend beyond the side of this projection, it would therefore extend beyond a wall forming a side elevation of the original dwellinghouse. Because it would also have a width greater than half the width of the original dwellinghouse, it would consequently fail to satisfy the requirements of paragraph A.1(j).

    Given that the proposal would effectively fully replace the existing projections rather than being joined to an existing enlargement to the rear of the dwelling, I do not consider that there would be an additional failure to satisfy the limitation at paragraph A.1(ja).

    Nevertheless and notwithstanding that there were no objections to the proposal from neighbouring occupiers, the failure to satisfy the limitation at paragraph A.1(j) means that I conclude that the development would not be permitted under Class A.

    The appellant refers to experience making similar applications in other local authority areas. However, no firm details have been provided and whether or not the same strategy and drawing standards were employed, it is unclear that any sites were directly comparable to the appeal property in respect of the presence of any pre-existing rear projections. It is not therefore apparent that the Council in this case has applied a different or incorrect interpretation to the legislation and the applications made in other areas do not alter my assessment of the appeal proposal which I have considered according to the specific circumstances of the site and the evidence that is before me.

    I have also noted the appellant’s submissions regarding the reasons for and need for the proposal and a lack of harm to neighbouring occupiers. However, such matters of broader planning judgment are not relevant to the assessment of whether or not a proposal would comply with the requirements of Class A, and do not alter my conclusion that the appeal scheme would not be permitted development under this Class. Nevertheless, it would be open to the appellant to make an application to the Council for planning permission.

  4. Section 05

    Conclusion

    For the reasons given above, I find that the proposal would not be permitted development under the requirements of Schedule 2, Part 1, Class A of the GPDO. I therefore 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 457No official casework-database value to compare
    Extracted decision date · page 1
    22 January 2026Matches the official casework database
    Extracted site visit dates
    20 January 2026 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
3374148
Application reference
DM2025/00957
Lead case reference
Not recorded
Planning authority
London Borough of Sutton
Planning authority code
E09000029

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
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
1
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
3 October 2025
Valid date
21 November 2025
Start date
26 November 2025
Planning authority decision date
22 August 2025
Appeal decision date
22 January 2026

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
83133
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