22 Highclere Sunninghill Ascot SL5 0AA

1. 9 Mar 2020

   Received by Windsor and Maidenhead

2. 7 Apr 2020

   Validated

   Checked as complete and ready for consideration.

3. 29 May 2020

   Decision issued: Permitted Development

4. 12 Oct 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 29 May 2020, 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.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

• 7 Highclere Sunninghill Ascot SL5 0AA

  20/01290/NMA Submitted 4 Jun 2020 50 yards away

  Non material amendments to planning permission 16/03394/FULL to amend the type of roof over the single storey side element on the South elevation.

  Refused Amendments 7 docs
  Small domestic

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

  25/02127/CPD Submitted 21 Aug 2025 100 yards 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

• 34 Kingswick Drive Ascot SL5 7BQ

  21/02708/FULL Submitted 6 Sep 2021 100 yards 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

  25/02600/FULL Submitted 2 Oct 2025 100 yards away

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

  Granted Full applications Extension Loft or dormer 20 docs

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

  26/00597/CONDIT Submitted 5 Mar 2026 100 yards 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

• 28 Highclere Sunninghill Ascot SL5 0AA

  22/00857/FULL Submitted 28 Mar 2022 100 yards 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

• 26/02222/CPD Refused

  52 Audley Way Ascot SL5 8EF

  Certificate of lawfulness to determine whether the proposed single storey rear extension following the removal of the existing conservatory is lawful.

  Received 8 Sep, published by the council 24 Sep 2026 Lawful development
• 26/01954/CPD Withdrawn

  Mulberry House Waltham Road Maidenhead SL6 3NH

  Certificate of lawfulness to determine whether the single storey rear extension is lawful.

  Received 7 Aug, published by the council 16 Aug 2026 Lawful development
• 26/01856/CLU Granted

  Apple Tree Cottage And Land Adjacent To Apple Tree Cottage Paley Street Maidenhead

  Certificate of lawfulness to determine whether the existing use of the land as a residential garden incidental to the main dwelling is lawful

  Received 28 Jul, published by the council 24 Aug 2026 Lawful development
• 26/02022/CPD Refused

  14 Church View White Waltham Maidenhead SL6 3JQ

  Certificate of lawfulness to determine whether the proposed 1no. rear dormer and alterations to fenestration are lawful

  Received 17 Aug, published by the council 2 Sep 2026 Lawful development
• 26/01862/CLU Granted

  Holyport Pre School Holyport Youth Club Moneyrow Green Holyport Maidenhead SL6 2NA

  Certificate of lawfulness to determine whether the existing use of the site as a pre-school is lawful.

  Received 29 Jul, published by the council 4 Aug 2026 Lawful development