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Appeal 3282984

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

described on the application form as ‘reinstatement of original (lower) ridge height, with reduction in height and retention of rear dormer roof extension’.

  1. Section 02

    Decision

    The appeal is allowed and planning permission is granted for the reinstatement of original (lower) ridge height, with reduction in height and retention of rear dormer roof extension at [site address] in accordance with the terms of the application, Ref 19172/APP/2021/1566, dated 20 April 2021, subject to the conditions appended to this decision.

  2. Section 03

    Main Issue

    The main issue is the effect of the development on the character and appearance of the surrounding area.

  3. Section 04

    Reasons

    The appeal site forms one of a pair of semi-detached properties. It, unlike its adjoining neighbour, has undergone a hip-to-gable roof extension, with its ridge level having been raised above that of the adjoining properties. From that perspective, the pair of semi-detached properties appear unbalanced in a street generally characterised by pairs of houses with matching hipped roofs. During my site visit I noted that several nearby properties in the surrounding area (although by no means the majority) have similar such hip-to-gable additions. [name] do not have the details of these cases before me, or the procedure by which they were allowed, they nonetheless exist and are noticeable within the street scene.

    The appellant has drawn my attention to the fact that a Certificate of Lawful Development was granted by the Council under Ref. 19172/APP/2019/798 for the conversion of the roof space at No 35. This included the hip-to-gable alteration and the construction of a rear dormer extension. I understand that this was constructed as per this approval apart from the ridge height, which was increased (therefore not in accordance with the Certificate of Lawful Development or the allowances under permitted development rights)1.

    It is now proposed to revert to a development that is more closely aligned to that approved under this previous Certificate of Lawful Development (CLD). This would be done by reducing the ridge level back in line with the adjoining property, whilst maintaining the hip-to-gable alteration and rear dormer extension.

    The proposal would undoubtably maintain the unbalanced appearance of the pair of properties, a feature which is incongruous relative to the generally consistent roofscape of the street. I agree with the Council’s position that, typically, such extensions would unlikely be considered appropriate due to the imbalance created between pairs of properties (as exemplified here) and the detrimental impact this has on the character and appearance of the wider street scene.

    Notwithstanding this harm, the fallback position of the appellant (the CLD) weighs in favour of the proposal. The works now proposed would address the development’s inconsistencies with the approved CLD (through the reinstatement of the original ridge level) and would bring the alterations back closely in line with what could be developed under permitted development rights. As the appellant has shown clear commitment to implementing the extensions under this route (through both the submission of a CLD and given that the development has already taken place, albeit not in full accordance), I do not consider the current proposal to be any more harmful than the options available to the appellant under permitted development rights. From the evidence before me, the effects of both the proposed development and fallback position would be very similar.

    I acknowledge the Council’s reference (within its officer’s report) to a previous Inspector’s decision at the same site. I do not have this case before me. However, I note2 that the Inspector concluded that there was no compelling evidence before them that could convince them that the fallback position at that time would be as harmful as the development then proposed. I consider that sufficient evidence has been provided to me on this occasion, as set out in in the foregoing reasoning. I have seen the approved plans under the CLD and have compared them with the proposal before me. The two schemes would have a very similar effect on character and appearance. I therefore give the fallback position significant weight.

    The dormer extension over the main rear roof slope is large but is not unusual in its design or form and is set back from the eaves, providing some visual relief. I find this element of the scheme acceptable. In any case, this element would also have a very similar effect on the character and appearance of the area relative to the scheme pursued under the CLD (the fallback position).

    Consequently, I conclude that the fallback position outweighs the conflict that I have found with the development plan in terms of the effects of character and appearance, as required under the relevant provisions of policy BE1 of the Local Plan Part One and policies DMHB 11 and DMHD 1 of the Local Plan Part 1 As set out in page 4 of the officer’s report 2 As set out in pages 4-5 of the officer’s report Two, which in summary seek to achieve a high-quality design that respects local character and enhances the local distinctiveness of the area.

  4. Section 05

    Conditions

    I have imposed a condition requiring compliance with the relevant plans together with a condition requiring that the external surfaces of the development match the existing building. These are imposed in the interests of certainty and to protect the character and appearance of the area.

    In imposing conditions, I have had regard to the tests within the National Planning Policy Framework, the Planning Practice Guidance, and relevant statute, and have accordingly amended the wording of certain conditions proposed by the Council without altering their aim.

  5. Section 06

    Conclusion

    For the above reasons, having had regard to the development plan as a whole and all other relevant material considerations, I conclude that the appeal should be allowed subject to the conditions below.

  6. Section 07

    SCHEDULE OF CONDITIONS

    The development hereby permitted shall begin not later than 3 years from the date of this decision.

    The development hereby permitted shall be carried out in accordance with the following approved plans: DWL 02; and DWL 05

    The external surfaces of the development hereby permitted shall match those used in the existing building.

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 325No official casework-database value to compare
    Extracted decision date · page 1
    3 February 2022Matches the official casework database
    Extracted site visit dates
    11 January 2022 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
3282984
Application reference
19172/APP/2021/1566
Lead case reference
Not recorded
Planning authority
London Borough of Hillingdon
Planning authority code
E09000017

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
0
Site in Green Belt
No
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
Allowed
Decision category
Allowed
Received date
15 September 2021
Valid date
15 September 2021
Start date
22 September 2021
Planning authority decision date
24 June 2021
Appeal decision date
3 February 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
9940
First seen
20 August 2026 at 14:24
Last seen
20 August 2026 at 16:25
Removed from release
Not recorded
Record created
20 August 2026 at 14:24
Record updated
24 August 2026 at 16:21