Sumner School Lane Cookham Maidenhead SL6 9QJ

1. 15 Oct 2025

   Received by Windsor and Maidenhead

2. 24 Nov 2025

   Decision issued: Application Permitted

3. 11 Aug 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 24 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 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.

• 12 Black Butt Cottages Cookham Maidenhead SL6 9RE

  21/03476/FULL Submitted 25 Nov 2021 40m away

  First floor side extension.

  Granted Full applications Extension 14 docs

• 13 Black Butt Cottages Cookham Maidenhead SL6 9RE

  23/00433/CPD Submitted 20 Feb 2023 43m away

  Certificate of lawfulness to determine whether the proposed air source heat pump to the side elevation is lawful.

  Refused Lawful development 11 docs

• Verge At Junction of Mill Lane And Sutton Road Cookham Maidenhead

  21/03688/TLDTT Submitted 17 Dec 2021 50m away

  Application for determination as to whether prior approval is required for proposed 5G telecoms installation: H3G Phase 8 15m high street pole c/w wrap-around cabinet and 3 further additional equipment cabinets.

  Refused Telecoms Extension 71 docs

• 2 Black Butt Cottages Cookham Maidenhead SL6 9RE

  23/02159/TCA Submitted 31 Aug 2023 62m away

  Ash - remove two branches (7-8m) to the north face of the tree, position of cuts shown in photograph in email of 8 September.

  Granted Trees 6 docs

• 5 Black Butt Cottages Cookham Maidenhead SL6 9RE

  21/02346/FULL Submitted 28 Jul 2021 66m away

  Two storey side extension and alterations to fenestration, following demolition of the existing garage and shed.

  Granted Full applications Extension Demolition +1 19 docs
  Small domestic

• 5 Black Butt Cottages Cookham Maidenhead SL6 9RE

  21/00756/FULL Submitted 12 Mar 2021 66m away

  Part single part two storey front/side extension and alterations to fenestration, following demolition of the existing single storey side element and shed.

  Granted Full applications Extension Demolition +1 19 docs
  Small domestic

• 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