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Planning application

Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

Refused Windsor and Maidenhead 23/01793/CPD Cert of Lawfulness of Proposed Dev

Works: Extension Loft or dormer Small domestic

Read from the description, not a valuation. How we read the register

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

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.

As published by the council, reference 23/01793/CPD

Application record

Reference
23/01793/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Refused As published: Refuse
Received
21 Jul 2023
Validated
21 Jul 2023
Decided
3 Aug 2023
Ward
Bisham And Cookham
Parish
Cookham Parish
Decision by
Delegated
Postcode
SL6 9AE

Site history

Applications at this address on the Windsor and Maidenhead register

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  • 24/02271/VAR Withdrawn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
  • 23/02029/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
  • 23/01789/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

Timeline

Dates from the published record

  1. 21 Jul 2023

    Received by Windsor and Maidenhead

  2. 3 Aug 2023

    Decision issued: Refuse

  3. 12 Sep 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

14 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

What this refusal means

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.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • Round Copse Alleyns Lane Cookham Maidenhead SL6 9AE

    24/02271/VAR Submitted 19 Sep 2024 0m 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

    23/01789/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

In Windsor and Maidenhead

  • 26/01743/CPD Refused

    1 Aston Mead Windsor SL4 5PW

    Certificate of lawfulness to determine whether the proposed replacement single storey rear extension is lawful.

    Received 16 Jul, published by the council 31 Jul 2026 Lawful development
  • 26/01828/CPU Granted

    Concorde Park Concorde Road Maidenhead SL6 4FJ

    Certificate of lawfulness to determine whether a private hire operators licence for taxi services is lawful.

    Received 27 Jul, published by the council 24 Aug 2026 Lawful development
  • 26/01853/CPU Granted

    20 Craufurd Rise Maidenhead SL6 7LS

    Certificate of lawfulness to determine whether the proposed use of a room on the ground floor as private hire operators licence is lawful.

    Received 27 Jul, published by the council 24 Aug 2026 Lawful development
  • 26/01781/CPD Refused

    163 Arthur Road Windsor SL4 1RZ

    Certificate of lawfulness to determine whether the proposed rear L shaped dormer with Juliet balcony and new air source heat pump are lawful.

    Received 21 Jul, published by the council 27 Jul 2026 Lawful development
  • 26/01553/CLU Granted

    64 Priors Way Maidenhead SL6 2EN

    Certificate of lawfulness to determine whether the existing use of building as self-contained residential dwelling as per details set out in Statutory Declaration is lawful.

    Received 24 Jun, published by the council 25 Jul 2026 Lawful development