Appeal 3374148
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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.
Section 02
Decision
The appeal is dismissed.
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’).
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.
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