Appeal 3292208
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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
construction of a single storey extension after demolition of existing conservatory.
Section 02
Decision
The appeal is dismissed.
Section 03
[name]
The main issues are: • whether the development would be inappropriate development in the Green Belt having regard to the National Planning Policy Framework (the Framework) and any relevant development plan policies; • the effect of the proposal on the openness of the Green Belt; and • whether the harm by reason of inappropriateness, and any other harm, would be clearly outweighed by other considerations so as to amount to very special circumstances required to justify the proposal.
Section 04
Inappropriate Development
The Framework identifies that the fundamental aim of Green Belt policy is to prevent urban sprawl by keeping land permanently open. Paragraph 147 of the Framework states that inappropriate development is, by definition, harmful to the Green Belt and should not be approved except in very special circumstances.
Paragraph 149 of the Framework establishes that the extension or alteration of a building is not inappropriate in the Green Belt provided that it does not result in disproportionate additions over and above the size of the original building. Policy GB1 of the [name] and Development Management Plan (2015) (Local Plan) builds on this by permitting proposals to extend existing dwellings within the Green Belt where they would meet certain criteria, including criteria to assess whether the addition would be disproportionate.
[name] of Policy GB1 of the Local Plan requires the applicant to provide clear evidence that the total floor space of the proposal, together with any previous extensions, alterations and outbuildings would not result in an increase of more than 50% above the floorspace of the “original” dwelling (measured externally) including outbuildings within 5m of the existing dwelling.
The proposed extension, excluding the conservatory that is to be demolished, would have a floorspace of 14.40m2. This would appear modest and proportionate compared to the existing dwelling that currently has a total floorspace of just below 170m2. However, I understand that the original dwelling has already been substantially extended and together the proposed extension and previous extensions would represent approximately a 70% increase in the total floorspace of the original dwelling. This would be significantly greater than the 50% increase permitted by Policy GB1 of the Local Plan. Therefore, although the proposed extension itself would be a modest and proportionate addition, it would result in disproportionate additions over and above the size of the original building.
For this reason, the proposal would conflict with Policy GB1 of the Local Plan. Accordingly, it would be an inappropriate form of development within the Green Belt, which, by definition, is harmful to the Green Belt.
Section 05
Openness of Green Belt
The proposed extension itself would have a small footprint and would be single storey with a flat roof. However, while it would be modest in scale, it would nevertheless reduce the spatial openness of the Green Belt.
In terms of visual effect, given the proposed extension would be located at the rear of the appeal property, views of it from the street scene would be restricted. While there would be an appreciable effect on openness from within the rear garden, in longer distance views, taken from the paddock behind the rear garden, the proposed extension would appear as a small addition to and subordinate part of the existing dwelling. It would also not interfere with the existing view of the paddock from the street scene taken through the gap between the appeal property and its neighbour. Nevertheless, the proposed extension would erode the visual openness of the Green Belt and would therefore result in harm, albeit this harm would be localised and limited.
For the reasons above, although localised and limited, the proposed extension would result in spatial and visual harm to the openness of the Green Belt. It would not preserve the openness of the Green Belt contrary to the fundamental aim of the Framework.
Section 06
[name]
In terms of benefits, it has been put to me by the appellant that the extension would provide additional space for the occupants, specifically a dining room. The previous dining room has been turned into a bedroom to allow a disabled member of the family to visit and potentially move in permanently in the future. The extra space would allow for family dining and would provide sufficient space for the disabled family member to manoeuvre around. These are personal circumstances to which I attribute weight in favour of the appeal.
In exercising my function on behalf of a public authority, I have had due regard to the Public Sector Equality Duty contained in the Equality Act 2010. The Act sets out the relevant protected characteristics which includes disability. Since there is the potential for my decision to affect a person with a protected characteristic, I have had due regard to the three equality principles set out in Section 149 of the Act.
I am mindful of the advice contained in the Planning Practice Guidance that, in general, planning is concerned with land use in the public interest. While the proposed extension would support a disabled family member, it would likely remain after the family member’s personal circumstances cease to be material. Furthermore, future use of the house by different occupants would also not necessarily entail a similar situation. Nevertheless, given the proposal would allow the family member to move in permanently in the future if required, I attribute moderate weight to this benefit.
The appellant has referred to other recent development taking place close to the appeal property, including a car shelter and 2/3-bedroom house. However, I do not have full details of these developments so I cannot be sure of their circumstances. In any case, I have determined the appeal on its own merits, based on the evidence before me.
Section 07
Conclusion
The proposal would represent inappropriate development in the Green Belt that would reduce openness. Inappropriate development is, by definition, harmful and should not be approved except in very special circumstances. In addition, openness is seen as an essential characteristic of Green Belts so a reduction in that quality would also be harmful. The NPPF advises that when considering any planning application, local planning authorities should ensure that substantial weight is given to any harm to the Green Belt.
Against this, the personal circumstances of a family member of the appellant, lends moderate weight in favour of the proposal. However, the NPPF sets out that very special circumstances will not exist unless the harm to the Green Belt by reason of inappropriateness and any other harm is clearly outweighed by other considerations. In this case, the other considerations in favour of the proposal would not clearly outweigh the harm I have identified to the Green Belt. Therefore, very special circumstances necessary to justify the proposal do not exist.
For the reasons given above, I 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 2938No official casework-database value to compare
- Extracted decision date · page 1
- 18 April 2023Matches the official casework database
- Extracted site visit dates
- 22 February 2023 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3292208
- Application reference
- 21/03616/HOUSE
- Lead case reference
- Not recorded
- Planning authority
- Sevenoaks District Council
- Planning authority code
- E07000111
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
- 16 m²
- 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
- 6 February 2022
- Valid date
- 6 February 2022
- Start date
- 7 April 2022
- Planning authority decision date
- 23 December 2021
- Appeal decision date
- 18 April 2023
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
- 31246
- 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