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Planning application

The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

Granted Windsor and Maidenhead 25/02600/FULL Full

Works: Extension Loft or dormer

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Extension to the existing external fire escape stairs with inset dormer to provide additional access at roof level.

As published by the council, reference 25/02600/FULL

Application record

Reference
25/02600/FULL
Type
Full
Status
Decided
Decision
Application Permitted
Received
2 Oct 2025
Validated
2 Oct 2025
Decided
2 Mar 2026
Ward
Ascot & Sunninghill
Parish
Sunninghill And Ascot Parish
Decision by
Delegated
Postcode
SL5 7PS

Site history

Applications at this address on the Windsor and Maidenhead register

This site has had 3 applications since 2025: 3 approved, 0 refused.

  • 26/00597/CONDIT Granted

    The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

    Details required by Condition 4 (Biodiversity enhancements) of planning permission 25/02600/FULL for an Extension to the existing external fire escape stairs with inset dormer to provide additional access at roof level.

    Decided 1 Apr 2026 Conditions
  • 25/02127/CPD Granted

    The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

    Certificate of lawfulness to determine whether the proposed internal alterations and alterations to fenestration is lawful.

    Decided 10 Sep 2025 Lawful development

Timeline

Dates from the published record

  1. 2 Oct 2025

    Received by Windsor and Maidenhead

  2. 2 Mar 2026

    Decision issued: Application Permitted

  3. 11 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/00597/CONDIT Granted

    The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

    Details required by Condition 4 (Biodiversity enhancements) of planning permission 25/02600/FULL for an Extension to the existing external fire escape stairs with inset dormer to provide additional access at roof level.

    Decided 1 Apr 2026 Conditions

Documents

Plans, drawings, consultee responses and the officer's report

20 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Trade members open them from here.

Open the documents

What this grant of permission means

Windsor and Maidenhead granted permission on 2 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

    26/00597/CONDIT Submitted 5 Mar 2026 0m away

    Details required by Condition 4 (Biodiversity enhancements) of planning permission 25/02600/FULL for an Extension to the existing external fire escape stairs with inset dormer to provide additional access at roof level.

    Granted Conditions Extension Loft or dormer 8 docs

  • 34 Kingswick Drive Ascot SL5 7BQ

    21/02708/FULL Submitted 6 Sep 2021 62m away

    Single storey front porch following demolition of existing element.

    Granted Full applications Extension Demolition 11 docs
    Small domestic

  • The Marist Senior School Kings Road Sunninghill Ascot SL5 7PS

    25/02127/CPD Submitted 21 Aug 2025 68m away

    Certificate of lawfulness to determine whether the proposed internal alterations and alterations to fenestration is lawful.

    Granted Lawful development Windows or glazing 15 docs

  • 19 Kingswick Drive Ascot SL5 7BQ

    21/01583/FULL Submitted 24 May 2021 106m away

    Two storey side extension and a single storey rear extension.

    Granted Full applications Extension 9 docs
    Small domestic

  • 28 Highclere Sunninghill Ascot SL5 0AA

    22/00857/FULL Submitted 28 Mar 2022 171m away

    Garage conversion, single storey front/side infill extension, single storey side/rear extension, 1no. rear Juliet balcony, replacement roof with raised ridge height, 2no. front dormers, alterations to fenestration.

    Granted Full applications Extension Loft or dormer +2 14 docs
    Small domestic

  • 10 Sunninghill Road Sunninghill Ascot SL5 7BU

    23/00034/FULL Submitted 6 Jan 2023 181m away

    x1 rear dormer to accommodate a loft conversion and alterations to fenestration.

    Granted Full applications Loft or dormer Windows or glazing 15 docs

In Windsor and Maidenhead

  • 26/00685/FULL Granted

    Blossoms Broomfield Park Sunningdale Ascot SL5 0JT

    Relocation of front entrance door, new front canopy, single storey side infill extension, part single part two storey rear extension, first floor side extension, 1no. front dormer and alterations to fenestration and external finishes following demolition of existing elements.

    16 Mar 2026 Full applications
  • 26/01566/FULL Refused

    20 Victoria Road Eton Wick Windsor SL4 6LY

    New front boundary treatment, piers and gates (part retrospective).

    25 Jun 2026 Full applications
  • 26/01732/FULL Granted

    27 Hemsdale Maidenhead SL6 6SL

    Enlargement and conversion of the existing garage, single storey side/rear extension and alterations to fenestration.

    15 Jul 2026 Full applications
  • 26/01676/FULL Granted

    51 Upper Village Road Ascot SL5 7AJ

    Single storey side/rear extension.

    9 Jul 2026 Full applications
  • 26/01227/FULL Granted

    92 Kennel Ride Ascot SL5 7NW

    Two storey side extension with canopy, single storey rear extension alterations to fenestration and a detached outbuilding ancillary to the main dwelling.

    14 May 2026 Full applications