Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

This site has had 10 applications since 2022: 4 approved, 2 refused.

• 26/02161/NMA Awaiting decision

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Non material amendments to planning permission 24/01755/FULL for alterations to the roof, roof overhang, fenestration and external finish.

  Submitted 2 Sep 2026 Amendments
• 26/01326/NMA Refused

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Non material amendments to planning permission 24/00494/FULL for changes to ground floor roof overhangs to be supported by beams and posts or with additional posts, alterations to fenestration on ground and first floor and additional windows to gable ends in roof-space, and insertion of rooflight in flat-top roof. Alterations to chimneys and 3no additional flues.

  Decided 23 Jun 2026 Amendments
• 26/00579/CONDIT Granted

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Details required by Condition 6 (BNG Calculations) and Condition 7 (Biodiversity Enhancements) of planning permission 24/00494/FULL for a replacement detached dwelling with solar panels.

  Decided 1 Apr 2026 Conditions
• 24/02271/VAR Withdrawn

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Variation (under Section 73) of Condition 13 to substitute those plans approved under 24/00494/FULL for the Replacement detached dwelling with solar panels with amended plans.

  Decided 5 Nov 2024 Amendments
• 23/02120/TPO Granted

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  As per submitted schedule, but with the following amendments: no works to T2 Oak, T29 Sycamore, T31 Sycamore and T32 Sycamore, and no works to T3 Oak other than pruning to give 2m clearance to the roof of the existing wooden garage and up to 5.2m clearance over the shared driveway east of the wooden access gate. (012/1984/TPO)

  Decided 17 Nov 2023 Trees
• 23/02004/CPD Withdrawn

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Certificate of lawfulness to determine whether the proposed single storey side extension, loft conversion with 2 no. rooflights, rear dormer and 3 no. outbuildings following demolition of existing garage is lawful.

  Decided 30 Oct 2023 Lawful development
• 23/01793/CPD Refused

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Certificate of lawfulness to determine whether the proposed single storey side extension, 1no. rear dormer, 2no. detached outbuildings and a replacement detached triple garage with office ancillary to the main dwelling is lawful.

  Decided 3 Aug 2023 Lawful development
• 23/01789/PDXL Withdrawn

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  Single storey rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.00m.

  Decided 1 Sep 2023 Prior approval
• 22/03414/TPO Granted

  Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  T3 - Beech - Crown reduction by 9m leaving a final height of 14m (012/1984/TPO).

  Decided 29 Mar 2023 Trees

1. 15 Aug 2023

   Received by Windsor and Maidenhead

2. 18 Sep 2023

   Decision issued: Prior Approval Not Required

3. 12 Sep 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 18 September 2023, 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.

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  23/01789/PDXL Submitted 21 Jul 2023 0m away

  Single storey rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.00m.

  Withdrawn Prior approval Extension 10 docs
  Small domestic

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  26/02161/NMA Submitted 2 Sep 2026 0m away

  71% historically approved · decision due ~28 Oct

  Non material amendments to planning permission 24/01755/FULL for alterations to the roof, roof overhang, fenestration and external finish.

  Awaiting decision Amendments Windows or glazing 5 docs

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  24/02271/VAR Submitted 19 Sep 2024 1m away

  Variation (under Section 73) of Condition 13 to substitute those plans approved under 24/00494/FULL for the Replacement detached dwelling with solar panels with amended plans.

  Withdrawn Amendments New dwelling 20 docs
  Domestic

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  23/01793/CPD Submitted 21 Jul 2023 1m away

  Certificate of lawfulness to determine whether the proposed single storey side extension, 1no. rear dormer, 2no. detached outbuildings and a replacement detached triple garage with office ancillary to the main dwelling is lawful.

  Refused Lawful development Extension Loft or dormer 14 docs
  Small domestic

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  26/01326/NMA Submitted 28 May 2026 2m away

  Non material amendments to planning permission 24/00494/FULL for changes to ground floor roof overhangs to be supported by beams and posts or with additional posts, alterations to fenestration on ground and first floor and additional windows to gable ends in roof-space, and insertion of rooflight in flat-top roof. Alterations to chimneys and 3no additional flues.

  Refused Amendments Loft or dormer Roofing +1 10 docs

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  26/00579/CONDIT Submitted 2 Mar 2026 2m away

  Details required by Condition 6 (BNG Calculations) and Condition 7 (Biodiversity Enhancements) of planning permission 24/00494/FULL for a replacement detached dwelling with solar panels.

  Granted Conditions New dwelling 7 docs
  Domestic

• 26/01684/PDXL Refused

  9 Duncroft Windsor SL4 4HH

  Single storey rear extension no greater than 6.00m in depth, 3.20m high with an eaves height of 2.90m.

  Received 10 Jul, published by the council 11 Aug 2026 Prior approval
• 26/01861/PDXL Granted

  6 Hendons Way Holyport Maidenhead SL6 2LF

  Single storey rear extension no greater than 6.00m in depth, 2.78m high with an eaves height of 2,70m.

  Received 29 Jul, published by the council 4 Aug 2026 Prior approval
• 26/01912/PDXL Granted

  Fourwinds 2 Green Lane Ascot SL5 7QJ

  Single storey rear extension no greater than 7.46m in depth, 3.20m high with an eaves height of 2.45m.

  Received 3 Aug, published by the council 11 Aug 2026 Prior approval
• 26/01789/PDXL Granted

  6 The Dell Maidenhead SL6 3NS

  Single storey rear extension no greater than 3.76m in depth, 2.90m high with an eaves height of 2.90m.

  Received 22 Jul, published by the council 31 Jul 2026 Prior approval
• 26/01831/PDXL Granted

  1 Bell View Windsor SL4 4ET

  Single storey rear extension no greater than 4.30m in depth, 2.80m high with an eaves height of 2.50m.

  Received 27 Jul, published by the council 31 Jul 2026 Prior approval