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
• 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• 23/02004/CPD Withdrawn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. 19 Sep 2024

   Received by Windsor and Maidenhead

2. 5 Nov 2024

   Decision issued: Application Withdrawn

3. 27 Jul 2026

   Added to PlanIndex

The applicant withdrew this application before Windsor and Maidenhead decided it, and is free to submit a revised scheme at any time. More in our guide to what happens after a planning decision.

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  23/01793/CPD Submitted 21 Jul 2023 0m 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

  23/01789/PDXL Submitted 21 Jul 2023 1m 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 1m 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 1m 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

  26/01326/NMA Submitted 28 May 2026 3m 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 3m 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

• 26/01860/VAR Refused

  72 - 72B High Street Sunninghill Ascot

  Variation (under Section 73A) of planning permission 22/01291/FULL without complying with Condition 8 (Electric Vehicle Charging Point).

  Received 29 Jul, published by the council 4 Aug 2026 Amendments
• 26/02252/VAR Awaiting decision

  18 Forlease Drive Maidenhead SL6 1UD

  Variation (under Section 73a) of Condition 4 to substitute those plans approved under 26/00518/FULL for the Garage conversion and single storey front/side extension with amended plans.

  Received 11 Sep, published by the council 18 Sep 2026 Amendments
• 25/03312/VAR Granted

  Land South of Bray Lake Windsor Road Maidenhead

  Variation (under Section 73) of Condition 29 (Approved Plans) to substitute those plans approved under 22/01791/OUT for an outline application for access, appearance, layout and scale only to be considered at this stage with all other matters to be reserved for the construction of x99 dwellings with associated vehicular and pedestrian access, car parking, drainage works and open space with amended plans.

  Received 15 Dec, published by the council 27 Jul 2026 Amendments
• 26/02137/NMA Refused

  Woodhaven 8 Dawnay Close Ascot SL5 7PQ

  Non material amendments to planning permission 23/02519/FULL as per supporting document.

  Received 28 Aug, published by the council 8 Sep 2026 Amendments
• 26/01975/VAR Withdrawn

  2 And LAnd At 2 Westfield Road Maidenhead SL6 5AU

  Variation (under Section 73) of planning permission 25/01013/FULL to remove Condition 15 (BNG).

  Received 10 Aug, published by the council 16 Aug 2026 Amendments