Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

This site has had 7 applications since 2021: 4 approved, 3 refused.

• 26/01823/CPD Granted

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

  Decided 29 Sep 2026 Lawful development
• 26/01170/PDXL Granted

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Single storey rear extension no greater than 8.00m in depth, 3.84m high with an eaves height of 2.78m.

  Decided 4 Jun 2026 Prior approval
• 26/01169/CPD Refused

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Certificate of lawfulness to determine whether the proposed garage conversion, single storey side/rear extension, 1no. dormer to north and 1no. dormer to south elevation and alterations to fenestration are lawful.

  Decided 3 Jul 2026 Lawful development
• 26/00048/CPD Refused

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Certificate of lawfulness to determine whether the proposed garage conversion, single storey side extension, single storey rear extension, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

  Decided 9 Mar 2026 Lawful development
• 22/00347/CPD Granted

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

  Decided 11 Apr 2022 Lawful development
• 21/03469/CPD Refused

  Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

  Decided 19 Jan 2022 Lawful development

1. 24 Jul 2026

   Received by Windsor and Maidenhead

2. 4 Aug 2026

   Added to PlanIndex

3. 28 Aug 2026

   Decision issued: Prior Approval Not Required

Windsor and Maidenhead granted permission on 28 August 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.

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  26/01169/CPD Submitted 11 May 2026 50 yards away

  Certificate of lawfulness to determine whether the proposed garage conversion, single storey side/rear extension, 1no. dormer to north and 1no. dormer to south elevation and alterations to fenestration are lawful.

  Refused Lawful development Extension Loft or dormer +1 14 docs
  Small domestic

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  26/01170/PDXL Submitted 11 May 2026 50 yards away

  Single storey rear extension no greater than 8.00m in depth, 3.84m high with an eaves height of 2.78m.

  Granted Prior approval Extension 15 docs
  Small domestic

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  26/00048/CPD Submitted 8 Jan 2026 50 yards away

  Certificate of lawfulness to determine whether the proposed garage conversion, single storey side extension, single storey rear extension, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

  Refused Lawful development Extension Loft or dormer 13 docs
  Small domestic

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  26/01823/CPD Submitted 24 Jul 2026 50 yards away

  Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

  Granted Lawful development Loft or dormer Windows or glazing 15 docs

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  22/00347/CPD Submitted 8 Feb 2022 50 yards away

  Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

  Granted Lawful development 7 docs

• Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

  21/03469/CPD Submitted 24 Nov 2021 50 yards away

  Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

  Refused Lawful development 7 docs

• 26/02170/PDXL Granted

  15 Cell Farm Avenue Old Windsor Windsor SL4 2PD

  Single storey rear extension no greater than 5.00m in depth, 2.85m high with an eaves height of 2.85m following demolition of the existing elements.

  Received 3 Sep, published by the council 12 Sep 2026 Prior approval
• 26/02445/PDXL Awaiting decision

  Mulberry House Waltham Road Maidenhead SL6 3NH

  Single storey rear extension no greater than 7.88m in depth, 3.50m high with an eaves height of 3.00m.

  Received 7 Oct, published by the council 9 Oct 2026 Prior approval
• 26/02001/CLAMA Granted

  158 Blackamoor Lane Maidenhead SL6 8RN

  Prior approval for the change of use of the ground floor from Use Class Eg(iii) to form 8 no. x 1 bedroom flats.

  Received 13 Aug, published by the council 24 Aug 2026 Prior approval
• 26/02425/PDXL Awaiting decision

  Eton Manor 60 Eton Road Datchet Slough SL3 9AY

  Single storey rear extension no greater than 6.00m in depth, 3.00m high with an eaves height of 2.75m.

  Received 5 Oct, published by the council 9 Oct 2026 Prior approval
• 26/02007/PDXL Refused

  18 Bradshaw Close Windsor SL4 5PS

  Single storey rear extension no greater than 3.60m in depth, 3.77m high with an eaves height of 2.43m.

  Received 13 Aug, published by the council 24 Aug 2026 Prior approval