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Official casework recordDismissedCurrent release

Appeal 6001382

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

10 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 side extension.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    Procedural Matter

    The appellant certified certificate A ownership with the planning application. Although the Council questioned its accuracy in relation to whether all proposed works lie within the red-line boundary, this is not a matter I need to address further as the appeal is being dismissed.

  3. Section 04

    [name]

    The main issues are:  Whether the proposal would be inappropriate development in the Green Belt, including the effect on openness and purposes of the Green Belt, having regard to the National Planning Policy Framework and any relevant development plan policies;  The effect of the proposal on trees; and,  Whether any 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.

  4. Section 05

    Inappropriate development

    The appeal site is within the Green Belt. Policy CP11 of the [name] 2011 (the [name]) states that there will be a general presumption against inappropriate development that would not preserve the openness of the Green Belt, or which would conflict with the purpose of including land within it. This aspect of the policy remains consistent with the essential characteristics and purposes of the Green Belt as set out in the National Planning Policy Framework (the Framework).

    The Framework sets out certain exceptions where development in the Green Belt is not inappropriate development. Part h. of paragraph 154 of the Framework allows for other forms of development provided they preserve its openness and do not conflict with the purposes of including land within it. This includes engineering operations.

    Within the appeal site, there is a sloping bank containing vegetation and several trees. To accommodate the proposed extension, this bank would need to be cut into. The proposed front‐elevation drawing indicates that a retaining wall would be in place. However, in the absence of technical drawings, such as existing and proposed site sections and levels plans, the extent of engineering operations required is not clear.

    The essential characteristics of Green Belts are their openness and their permanence. Openness can be perceived both spatially and visually. The introduction of an engineered structure would create new built form where none presently exists, resulting in some loss of spatial openness. Removing trees and vegetation, combined with the addition of a hard, vertical surface, would create a more urbanised appearance. However, it is recognised that the retaining wall would not be particularly visible from public views. Taken together, these changes would result in both a visual and spatial loss of openness to the Green Belt, albeit to a limited degree due to the modest scale. Nevertheless, this would fail to preserve the openness of the Green Belt, and the use of sympathetic materials would not overcome this harm.

    Although it is stated that planting would take place over time, no further details have been provided. The scale and depth of excavation would directly determine what landform would remain, what planting could be accommodated, and whether any meaningful soft landscaping could be achieved. As the full extent of the excavation works is unknown, landscaping details cannot be secured by a planning condition.

    The appellant has confirmed that the proposal would be within the curtilage of the appeal site, which is reflected on the proposed block plan. There is no substantive evidence before me to dispute this. The proposal would therefore not result in encroachment into the countryside. Whilst the proposal would not conflict with the purposes of including land within the Green Belt, this does not diminish my overall conclusion that it does not preserve the openness of the Green Belt.

    For the above reasons, I conclude that the proposal would not meet the exception listed at part h. of paragraph 154 of the Framework. It would therefore be inappropriate development in the Green Belt and would conflict with Policy CP11 of the [name], the purposes of which are set out above. It would also conflict with the objectives of the Framework in keeping Green Belt land permanently open.

  5. Section 06

    Trees

    The vegetated bank contains several very tall trees that provide visual continuity with the adjoining woodland. Although there is no Tree Protection Order in place, collectively, these trees contribute to the established woodland character of the appeal site and reinforce the natural landscape setting of the surrounding area. The Council set out in the [name] that the bank appears to support several mature trees, and there is no detailed information before me to counter this.

    The appellant indicates that trees have already been removed. During my site visit, it was evident that some trees had indeed been cut down, although a number of trees remain along the bank. However, in the absence of any arboricultural assessment or supporting drawings, it is not possible to determine whether further tree removal would be required to accommodate the proposal, nor whether the trees that are intended to be kept could realistically be safeguarded and continue to develop without harm. Given this uncertainty, I cannot conclude that the remaining trees would continue to function as a cohesive woodland group or that they would maintain the existing character.

    Although the appeal site benefits from roadside vegetation, because of the rising bank and the height of the trees, it means that the trees are still likely to be visible from a public vantage point. The appellant’s willingness to accept a planning condition requiring replacement tree planting elsewhere on the site is acknowledged. However, such planting would not occupy the same position within the landscape nor replicate the established contribution of the trees in this part of the site, whose value arises from their grouping, location and integration with the wider woodland. In the absence of detailed arboricultural information, I am not satisfied that this harm could be adequately mitigated by condition.

    For the above reasons, I conclude that the proposal would cause moderate harm to trees. Accordingly, it conflicts with Policy DM6 of the Development Management Policies Local Development Document 2013 (the DMPLDD). This policy, amongst other things, requires development proposals to retain as many trees as possible, be designed in such a way that allows trees to grow and demonstrate that existing trees will be safeguarded and managed during and after development in accordance with the relevant [name].

  6. Section 07

    Other considerations

    The Council raised no objection in respect of design, impact on neighbours, highways and parking provision and the size of the rear amenity space. However, compliance with relevant national and local planning policies on these matters would be required in any case. These are therefore neutral matters and neither weigh in favour nor against the appeal scheme.

  7. Section 08

    Other Matters

    The reason for refusal cites conflict with Policy DM2 of the DMPLDD, which concerns the construction of new buildings in the Green Belt. As the refusal relates solely to the engineering operations, this policy is not determinative. In the same regard, the Supplementary Planning Guidance No3 - Extensions to Dwellings in the Green Belt August 2003 is not relevant.

  8. Section 09

    Green Belt Balance

    Inappropriate development is, by definition, harmful to the Green Belt and should not be approved except in very special circumstances. Very special circumstances will not exist unless the potential harm to the Green Belt by reason of inappropriateness, and any other harm resulting from the proposal, is clearly outweighed by other considerations.

    The proposal would be inappropriate development in the terms set out by the Framework. As required by the Framework, substantial weight is given to this harm. The proposal would also cause moderate harm to trees. Against this harm, there are no other considerations that are afforded weight in support of the appeal. Consequently, very special circumstances necessary to justify the development do not exist.

    The proposal would conflict with Policy CP11 of the [name], Policy DM6 of the DMPLDD and the objectives of the Framework.

  9. Section 10

    Conclusion

    The proposal conflicts with the development plan and the material considerations, including the Framework, do not indicate that the appeal should be decided other than in accordance with it. Therefore, 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 5346No official casework-database value to compare
    Extracted decision date · page 1
    16 April 2026Matches the official casework database
    Extracted site visit dates
    24 March 2026 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
6001382
Application reference
25/1165/FUL
Lead case reference
Not recorded
Planning authority
Three Rivers District Council
Planning authority code
E07000102

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
Not recorded
Appeal reason
refused
Type detail
Householder
Jurisdiction
No Jurisdiction Associated
Link status
Not recorded

Site and development

Published appeal-site measurements and planning designations, without the withheld precise location fields.

Site area
0 hectares
Floor space
1,000 m²
Number of residences
Not recorded
Site in Green Belt
Yes
Agricultural holding
Not recorded
Affects setting of a listed building
Yes
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
31 October 2025
Valid date
31 October 2025
Start date
6 November 2025
Planning authority decision date
3 September 2025
Appeal decision date
16 April 2026

Case administration

Published recovery, call-in, costs and enforcement information for this case.

Redetermined
Not recorded
Bespoke
Not recorded
Date recovered
Not recorded
Date not recovered or derecovered
Not recorded
Call-in date
Not recorded
Costs applied for
No
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
Back Office
Dataset status
Current release
Catalogue record ID
87460
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