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Official casework recordDismissedCurrent release

Appeal 3370792

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

9 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

double storey rear extension and a loft conversion.

  1. Section 02

    Decision

    The appeal is dismissed.

  2. Section 03

    Appeal Procedure

    The site visit was undertaken by a representative of the Inspector whose recommendation is set out below and to which the Inspector has had regard before deciding the appeal.

  3. Section 04

    Preliminary Matters and [name]

    The description on the application form does not include the proposed front extension. For the avoidance of doubt, I have also considered this in my reasoning below.

    The Council does not object to the ground and first floor front bay window, hip to gable extension and alterations to the fenestration. Based on all that I have seen and read, I see no reason to disagree. This decision therefore focuses on the proposed rear extension and, specifically, its effect on the character and appearance of the area and the effect of the proposed development on protected species.

  4. Section 05

    Character and appearance

    The appeal property is a two storey detached dwelling. It is located on the [site address] and backs onto [address], both of which consist of similarly designed and sized residential properties, several of which have been extended or altered. The appeal dwelling is one of a few detached dwellings within the area which contributes to a pleasant variety to the character and appearance.

    The proposed rear extension would be visible from two public vantage points. Firstly, from [site address] where the side elevation can be seen and secondly from [address] where glancing views of the rear of the appeal site can be gained. In both cases because of the extensions recessed position to the rear and the appeal dwellings generous, verdantly screened plot the proposed rear extension would not be read as an unduly prominent feature in the street scene.

    The proposal would be seen as a later addition to the main body of the dwelling. The Council consider that the proposed development would result in harm through virtue of the proposed extensions massing and height and would thus conflict with Principle 10.4 of the Borough Wide Design Guide (2020). Although the extension would increase the depth of the appeal dwelling and would match the existing dwellings ridge height it would not result in an overly prominent addition. I observed on my site visit that properties on [address], [site address] and [address] vary in their design, depth and height which would result in the appeal proposals being read in conjunction with this varied character and appearance to the area. Therefore, the height of the proposal would not have an adverse impact on the character of the host property and surrounding area.

    Given the overall design, size and position of the proposed extension, I do not find there would be harm to the character and appearance of the host dwelling. The use of materials to match those of the host dwelling, which could have been secured by condition, would create an acceptable visual connection with the host property.

    I conclude that the proposed development would not harm the character and appearance of the host dwelling and the surrounding area. The proposed development therefore complies with Policy QP3 of the Borough Local Plan (2022), Policy DAT8 of the Datchet Neighbourhood Plan (2023) and the guidance set out in the Borough Wide Design Guide (2020) which all seek, amongst other things, for development to respect and enhance local character paying particular regard to urban grain, layouts, rhythm, density, height, skylines, scale, bulk, massing, proportions and materials.

  5. Section 06

    [name]

    The appeal property is evidently close to a woodland, albeit I note the distance is disputed, and the proposal involves extensive work to the roof including the roof void. I have had regard to the Circular1 which advises that bearing in mind the delay and cost that may be involved, developers should not be required to undertake surveys for protected species unless there is a reasonable likelihood of the species being present and affected by the development.

    Furthermore, guidance from Natural England2 (NE) advises that surveys should be requested in certain circumstances, including where buildings are close to woodland or have hanging tiles or timber cladding on south facing walls. While other criteria in that list do not apply, I note in this case, those above are relevant.

    While guidance may not be definitive on this matter, to my mind the site specific circumstances raise a reasonable likelihood of there being bats nesting or roosting in the roof area. As such, in order to avoid the potential for harm to this protected species, a survey would be appropriate. As there is no bat survey before me, I am not able to rule out the possibility of bats being disturbed or unacceptably harmed by the proposal. Attaching a planning condition to a grant of planning permission to require a bat survey to be produced prior to commencement of development would 1 Biodiversity And Geological Conservation – [name] and Their Impact Within The Planning System 2 Bats: advice for making planning decisions not provide a solution as the results may show the presence of bats, but permission would have been granted. This approach would not be suitable in this case.

    I have had regard to the appellant’s other submissions on this matter, including that the extension would be on the north facing elevation at the rear of the property and that the south facing front elevation is not materially changed, so the prospect of disturbing bats is remote. However, the proposed plans show a two-storey front bay window to the front. Regardless, the proposal includes significant changes to the roof space and as such this does not convince me the proposal would not disturb or harm bats.

    Furthermore, the site check search results indicate that there are no records of bats nearby. However, as the NE guidance advises, absence of a record does not mean there are no bats. It could mean there is no survey data available for that location.

    Consequently, I conclude that there is insufficient information on which to conclude that harm to bats would be avoided and this would be in conflict with Policy NR2 of the Borough Local Plan (2022) and Policy DAT8 of the Datchet Neighbourhood Plan (2023) which both seek amongst other things for all development to protect existing habitats and species.

  6. Section 07

    Other Matters

    I note the appellant’s concerns regarding how the Council handled the planning application. However, it is not my role to mediate disputes of this type. The Council will have its own complaints procedure, and I would advise the appellant to explore this for future reference. I have assessed the proposal on its own merits based on the evidence before me.

  7. Section 08

    Conclusion and Recommendation

    [name] have concluded that there would be a lack of harm on the first main issue, I cannot be certain that protected species are sufficiently safeguarded in regard to the second main issue. As a result, I therefore recommend the appeal be dismissed.

  8. Section 09

    Inspector’s Decision

    I have considered all the submitted evidence and my representative’s report and on that basis 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 550No official casework-database value to compare
    Extracted decision date · page 1
    3 December 2025Matches the official casework database
    Extracted site visit dates
    16 September 2025 (page 1)

Reference and authority

Official identifiers and the planning authority recorded against this case.

Case reference
3370792
Application reference
25/00812
Lead case reference
Not recorded
Planning authority
Royal Borough of Windsor and Maidenhead
Planning authority code
E06000040

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
Not recorded
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
9 August 2025
Valid date
14 August 2025
Start date
14 August 2025
Planning authority decision date
21 May 2025
Appeal decision date
3 December 2025

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
80774
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