Appeal 3282111
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
7 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 addition of one extra storey to existing dwellinghouse.
Section 02
Decision
The appeal is dismissed.
Section 03
[name]
Under Article 3(1) and Schedule 2, Part 1, Class AA(b) of the Order, planning permission is granted for the enlargement of a dwellinghouse consisting of the construction of one additional storey, where the existing dwellinghouse consists of one storey, immediately above the topmost storey of the dwellinghouse, subject to any relevant exception, limitation or condition.
Section 04
[name]
The main issues are: • whether the proposal would be permitted development under Class AA(b) of the Order having regard to the requirements of paragraphs AA.1(d), (h) and (i); and • if so, whether prior approval is required with regard to the conditions set out in paragraphs AA.2(3)(a)(i) and (ii).
Section 05
Permitted development
The existing dwellinghouse is a detached chalet bungalow. The proposal seeks to enlarge it by replacing the accommodation in the roof and increase it with a conventional first floor with a new roof above. This would create a two-storey house.
Under paragraph AA.1(i) development is not permitted by Class AA(b) if any additional storey is constructed other than on the ‘principal part’ of the dwellinghouse. [name].4 defines the principal part of a dwellinghouse as ‘the main part of the dwellinghouse excluding any front, side or rear extension of a lower height, whether this forms part of the original dwellinghouse or is a subsequent addition’.
The additional storey would be narrow in depth and span the entire width of the chalet bungalow, including above the part annotated in the ‘as existing’ ground floor plan as a lobby, study and bathroom1. However, this part of the existing dwellinghouse is, or includes, a single storey ground floor side extension added after the chalet bungalow was originally built. It is lower in height than the main, taller central part of the building which includes the accommodation in the roof. The additional storey would not, therefore, be constructed entirely on the principal part of the dwellinghouse.
Consequently, the proposal would not comply with paragraph AA.1(i) and as a result it would not be permitted development under Class AA(b) of the Order.
[name].1(d) and (h) are also in dispute. However, there is no need for me to consider these requirements because I have already found that the proposal would not be permitted development.
Section 06
Prior approval
The conditions set out in paragraph AA.2(3)(a)(i) relate to the impact of the proposal on the amenity of any adjoining premises, and in (ii) to the external appearance of the dwellinghouse.
Given my finding in relation to the first main issue, I do not need to consider these prior approval matters as it would not alter the outcome of the appeal.
Section 07
Conclusion
For the reasons set out above, I conclude that the appeal should not succeed.
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 122No official casework-database value to compare
- Extracted decision date · page 1
- 19 April 2022Matches the official casework database
- Extracted site visit dates
- 4 April 2022 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3282111
- Application reference
- DM2021/00768
- 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
- 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
- Not recorded
- Number of residences
- 0
- Site in Green Belt
- Yes
- 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
- 1 September 2021
- Valid date
- 16 September 2021
- Start date
- 2 December 2021
- Planning authority decision date
- 11 June 2021
- Appeal decision date
- 19 April 2022
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
- 14034
- First seen
- 20 August 2026 at 14:24
- Last seen
- 20 August 2026 at 16:26
- Removed from release
- Not recorded
- Record created
- 20 August 2026 at 14:24
- Record updated
- 24 August 2026 at 16:21