Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

This site has had 10 applications since 2022: 4 approved, 3 refused.

• 26/02161/NMA Refused

  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.

  Decided 22 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
• 24/02271/VAR Withdrawn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
• 23/02029/PDXL Granted

  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 18 Sep 2023 Prior approval
• 23/02004/CPD Withdrawn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. 2 Mar 2026

   Received by Windsor and Maidenhead

2. 3 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 1 Apr 2026

   Decision issued: Approve Discharge of Condition

4. 25 Jul 2026

   Added to PlanIndex

Windsor and Maidenhead granted permission on 1 April 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.

This application deals with conditions on an existing permission, supplying the details a condition requires or asking to vary or remove one, without reopening the permission itself. More in our guide to planning application types.

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  26/01326/NMA Submitted 28 May 2026 50 yards 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

  23/01789/PDXL Submitted 21 Jul 2023 50 yards 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

  23/02029/PDXL Submitted 15 Aug 2023 50 yards away

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

  Granted Prior approval Extension 12 docs
  Small domestic

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  26/02161/NMA Submitted 2 Sep 2026 50 yards away

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

  Refused Amendments Windows or glazing 7 docs

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  23/02004/CPD Submitted 15 Aug 2023 50 yards away

  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.

  Withdrawn Lawful development Extension Loft or dormer +1 13 docs
  Small domestic

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  24/02271/VAR Submitted 19 Sep 2024 50 yards 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

• 26/02463/CONDIT Awaiting decision

  Land Adjacent To 4 Block D Cavalry Crescent Windsor

  Details required by Condition 2 (Contaminated Land) of planning permission 23/01817/FULL for 2no. three bedroom dwellings with associated parking and landscaping following the demolition of the existing garage block.

  Received 8 Oct, published by the council 12 Oct 2026 Conditions
• 26/02232/CONDIT Granted

  Riverside Gibraltar Lane Cookham Maidenhead SL6 9TR

  Details required by Condition 3 (Bat Licence) of planning permission 23/03099/FULL for the enlargement of existing lower ground floor, two storey front extension with front gable, single storey rear extension with balustrade, 2no. proposed rear dormers, , 3no. chimneys, raised terrace with balustrade, steps and conversion of existing garage to an annex ancillary to main dwelling with new roof, alterations to fenestration and external finishes, replacement garage, new EV charger, hardstanding, landscaping, retaining wall and boundary treatment to front, following demolition of existing elements.

  Received 9 Sep, published by the council 12 Sep 2026 Conditions
• 26/02217/CONDIT Granted

  Land South of Kimbers Lane Maidenhead

  Details required by Condition 25 (Bat Licence confirmation) of planning permission 24/02786/FULL for a Full planning application for 225 dwellings together with access, landscaping, open space, parking and associated infrastructure.

  Received 8 Sep, published by the council 12 Sep 2026 Conditions
• 26/02209/CONDIT Granted

  Southleigh & Willianns High Street Cookham Maidenhead

  Details required by Condition 4 (Roof tiles) and 8 (Biodiversity enhancements) of planning permission 25/03339/FULL for a Two storey rear extensions with 1no. Juliet balcony. A loft conversion with 2no. rear rooflights to Southleigh.

  Received 8 Sep, published by the council 12 Sep 2026 Conditions
• 26/02455/CONDIT Awaiting decision

  Bisham Abbey Bisham Village Marlow Road Bisham Marlow SL7 1RR

  Details required by Condition 2 (Ecology) of listed building consent 26/01697/LBC for roof repairs including renewal of the lead coverings to Roofs O1, O2 and O3, replacement of the modern Roof M with a new lead roof, localised repairs to other lead and felt roofs, and replacement of defective clay roof tiles. Localised repairs to masonry, windows, joinery, rainwater goods and soil pipes. Replacement of the external fire escape stair and installation of new roof access hatches and permanent mansafe systems to facilitate future inspection and maintenance.

  Received 7 Oct, published by the council 12 Oct 2026 Conditions