Appeal 3301587
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Official decision document
The decision, section by section
8 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
[name]
The main issues are: • whether the proposed 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 proposed development on the openness of the Green Belt; and • if the proposed development is inappropriate, whether the harm by reason of inappropriateness and any other harm, would be clearly outweighed by other considerations so as to amount to the very special circumstances required to justify the proposal.
Section 04
Whether inappropriate development
The Framework identifies that the fundamental aim of Green Belt policy is to prevent urban sprawl by keeping land permanently open. It goes on to state that inappropriate development is, by definition, harmful to the Green Belt and should not be approved except in very special circumstances. The Framework further establishes that the construction of new buildings in the Green Belt should be regarded as inappropriate, subject to several exceptions as set out in paragraph 149. One such exception is c) the extension or alteration of a building provided that it does not result in disproportionate additions over and above the size of the original building.
The term original building is defined as a building as it existed on 1 July 1948 or, if constructed after this date, as it was built originally. Based on the evidence before me, the dwelling has been extended from its original form with a two-storey side and a single-storey rear extension. These are identified in the Householder Application Report, alongside the floorspace of the original dwelling and the existing extension.
Policy GB1 of the [name] and Development Management Plan (the ADMP) provides further definition of the floorspace of extensions to dwellings in the Green Belt the Council considers to be acceptable, over and above the size of the original building, limiting such an increase to 50 percent. Whilst it would be modest in size and bulk and would not result in any greater rearward projection of the building, in combination with the existing extensions, the main parties agree that the appeal scheme would exceed this percentage. I acknowledge that Policy GB1 of the ADMP supports proposals incorporating a design that responds to the form and appearance of the original building, providing the volume of the extension/s is subservient to it. However, these requirements are precursors to the 50 percent floorspace limit set out in the policy, As a result, in combination with the existing extensions, the proposed development would result in a significant increase in the floorspace, volume, bulk and massing of the original dwelling.
Therefore, it is my objective view that it would be a disproportionate addition over and above the size of the original building. It would be contrary to Policy GB1 of the ADMP and would not meet the exception set out in paragraph 147c). Consequently, it would be inappropriate development in the Green Belt and should not be approved except in very special circumstances.
Section 05
Openness
The Framework states that openness is an essential characteristic of the Green Belt. It has a spatial as well as a visual aspect, as identified in a Court of Appeal1 decision. Given the proposed extension would be located to the rear of the existing dwelling, it would not be visible as part of the principal elevation of the property, nor from any public vantage points. Furthermore, its single-storey height would limit its visibility from neighbouring dwellings. As such, it would not cause harm to the visual aspect of the openness of the Green Belt.
However, the proposed development would increase the volume and mass of the existing dwelling. Whilst this increase alone would be limited given the overall scale of the appeal scheme, nonetheless it would result in a loss of Green Belt in terms of its spatial aspect as it would introduce built form where there is currently none. As such, it would conflict with the fundamental aim of the Green Belt and its ability to assist in safeguarding the countryside from encroachment.
Section 06
Other considerations
The assertion that a similar scale of extension could be constructed under the provisions of the Town and Country Planning (General Permitted Development) (England) Order 2015 has been made. My attention has been drawn to the fact that as such a scheme would retain the existing extension and would incorporate a flat roof, it would be of a lower standard of design and appearance than the appeal scheme. However, it would not project as far into the garden as the proposed development and would, therefore, encroach into the Green Belt to a lesser extent than the appeal scheme. Moreover, I have 1 Turner v SSCLG & [name] [2016] [name] 446 limited substantive detail before me to conclude that, concerning the design and appearance of this fallback scenario, it would be significantly more harmful than the appeal scheme, even if the appeal scheme looks like a single extension, rather than two. Any improvement in financial implications of the proposed development in comparison with the fallback scenario amounts to a private, rather than public benefit. Overall, I attach moderate weight to this as a fallback scenario.
Whilst an extension which projects further into the garden may be permissible under the [name] process, this scale of development does not form part of the appeal scheme before me and I have no substantive evidence that a [name] application has been submitted. Additionally, the lack of neighbour objections does not guarantee a successful [name] application. Therefore, I attach limited weight to this scenario.
Should the appellant demolish the existing extension and then submit another planning application for a full-width rear extension, any reduction in environmental impacts as a result would be minimal given the scale of the development. I also attach limited weight in this respect.
The proposed development would result in additional space for the benefit of the appellant and their family whilst making effective use of the space to the rear of the property that the appellant considers to be untidy. Whilst the existing dwelling may not be currently used to its full potential, I have no substantive information to demonstrate this nor that the proposed development is the only way to achieve this. Therefore, I attach very limited weight to the personal benefits which would result from the proposed development.
The fact that the proposed development would not lead to a loss of trees or green space nor cause harm to the character and appearance of the area, in accordance with the Framework’s objective of creating well-designed places, or the living conditions of neighbouring occupiers are neutral factors in my decision. Similarly, the lack of concerns beyond those related to the proposed development being inappropriate development in the Green Belt, raised by the Fawkham Parish Council does not weigh in favour of the grant of planning permission. Furthermore, the lack of neighbour objections received during the determination of the application does not mean otherwise unacceptable development should be permitted. Therefore, these are also neutral factors in my decision.
I have been referred to other dwellings close to the appeal site that have been extended. Notwithstanding the lack of information regarding the circumstances of these extensions including their size and that of the original building alongside the policies in place at the time in each case, they are not reasons, in themselves, to justify further harm. Consequently, they weigh neither for nor against the proposed development.
Section 07
Green Belt Balance
The proposed development would be inappropriate development in the Green Belt and would result in a harmful loss of openness to the Green Belt, in spatial terms. The Framework indicates that inappropriate development should not be approved except in very special circumstances. Such circumstances will not exist unless the potential harm to the Green Belt by reason of inappropriateness, and any other harm, is clearly outweighed by other considerations. The Framework requires that the harm by reason of inappropriateness and to the openness of the Green Belt be given substantial weight.
Section 08
Conclusion
For the reasons set out above the harm to the Green Belt would not be clearly outweighed by the other considerations and, therefore, the very special circumstances required to justify the grant of planning permission have not been demonstrated. Consequently, the appeal is 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 3913No official casework-database value to compare
- Extracted decision date · page 1
- 12 September 2023Matches the official casework database
- Extracted site visit dates
- 9 August 2023 (page 1)
Reference and authority
Official identifiers and the planning authority recorded against this case.
- Case reference
- 3301587
- Application reference
- 22/00737/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
- Not recorded
- Number of residences
- 1
- 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
- 21 June 2022
- Valid date
- 21 June 2022
- Start date
- 4 November 2022
- Planning authority decision date
- 19 May 2022
- Appeal decision date
- 12 September 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
- 38453
- 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