Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

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

• 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• 24/02271/VAR Withdrawn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
• 23/02029/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• 23/02004/CPD Withdrawn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 Sep 2026

   Received by Windsor and Maidenhead

2. 8 Sep 2026

   Added to PlanIndex

3. 22 Sep 2026

   Decision issued: Refuse

Windsor and Maidenhead refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. 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

  23/01789/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

  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

• Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

  23/01793/CPD Submitted 21 Jul 2023 50 yards 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 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

  26/00579/CONDIT Submitted 2 Mar 2026 50 yards 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

• 26/00814/VAR Granted

  Land West of Switchback Road North And North of Nightingale Lane Maidenhead

  Variation (under Section 73a) of planning permission 21/02963/FULL to vary the wording of Condition 8 (Drainage), 9 (Vehicles), 10 (Landscaping) and 11 (Painting) without complying with one month time limit.

  Received 27 Mar, published by the council 25 Jul 2026 Amendments
• 26/01411/VAR Granted

  Whiteladies Park Prince Albert Drive Ascot SL5 8AQ

  Variation (under Section 73) of Condition 11 to substitute those plans approved under 25/03016/FULL for the Redevelopment of existing dwelling, including demolition and reconstruction of western extension, the construction of an eastern extension including an indoor swimming pool, and creation of a basement area with amended plans.

  Received 8 Jun, published by the council 25 Jul 2026 Amendments
• 26/01792/VAR Granted

  Silver Birches St Marys Road Ascot SL5 9JE

  Variation (under Section 73) of Condition 9 (Approved Plans) to substitute those plans approved under 26/00205/FULL for a raised ridge, 2 no. front dormers and 1 no. rear dormer, 1no. side bay window, new chimney, single storey side/rear extension, alterations to fenestration and hardstanding, following demolition of existing elements with amended plans.

  Received 22 Jul, published by the council 31 Jul 2026 Amendments
• 26/02420/NMA Awaiting decision

  Development At King Street And Queen Street And Broadway Maidenhead

  Non material amendments to planning permission 25/00066/VAR as per covering letter.

  Received 2 Oct, published by the council 9 Oct 2026 Amendments
• 26/02152/NMA Granted

  Land Bounded By Ascot Fire Station Station Hill And West of Hermitage Parade And South of High Street Ascot SL5 7HF

  Non material amendments to planning permission 25/01050/FULL to amend the wording of Condition 8 (Bat Mitigation Scheme).

  Received 1 Sep, published by the council 8 Sep 2026 Amendments