16 Keppel Spur Old Windsor Windsor SL4 2LU

1. 15 Aug 2025

   Received by Windsor and Maidenhead

2. 6 Oct 2025

   Validated

   Checked as complete and ready for consideration.

3. 27 Nov 2025

   Decision issued: Permitted Development

4. 11 Aug 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 27 November 2025, 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.

• 18 Keppel Spur Old Windsor Windsor SL4 2LU

  26/01110/FULL Submitted 5 May 2026 50 yards away

  Single storey rear/side extension following demolition of existing elements.

  Granted Full applications Extension Demolition 23 docs
  Small domestic

• 17 Keppel Spur Old Windsor Windsor SL4 2LU

  22/02473/CPD Submitted 9 Sep 2022 50 yards away

  Certificate of lawfulness to determine whether the proposed 2no. front rooflights, 1no. gable window and 1no. rear dormer is lawful.

  Granted Lawful development Loft or dormer Windows or glazing 7 docs

• 17 Keppel Spur Old Windsor Windsor SL4 2LU

  23/00112/FULL Submitted 16 Jan 2023 50 yards away

  x1 detached outbuilding.

  Granted Full applications 11 docs

• 17 Keppel Spur Old Windsor Windsor SL4 2LU

  22/01042/PDXL Submitted 19 Apr 2022 50 yards away

  Single storey rear extension no greater than 6.00m in depth, 3.50m high with an eaves height of 2.70m.

  Granted Prior approval Extension 10 docs
  Small domestic

• 17 Keppel Spur Old Windsor Windsor SL4 2LU

  22/03080/FULL Submitted 16 Nov 2022 50 yards away

  Detached outbuilding.

  Refused Full applications 11 docs

• 17 Keppel Spur Old Windsor Windsor SL4 2LU

  22/02424/FULL Submitted 5 Sep 2022 50 yards away

  Detached outbuilding.

  Refused Full applications 8 docs

• 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• 26/01954/CPD Withdrawn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