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Planning application

Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

Refused Windsor and Maidenhead 26/01169/CPD Cert of Lawfulness of Proposed Dev

Works: Extension Loft or dormer Windows or glazing 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 garage conversion, single storey side/rear extension, 1no. dormer to north and 1no. dormer to south elevation and alterations to fenestration are lawful.

As published by the council, reference 26/01169/CPD

Application record

Reference
26/01169/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Refuse
Received
11 May 2026
Validated
11 May 2026
Decided
3 Jul 2026
Ward
Bisham And Cookham
Parish
Cookham Parish
Decision by
Delegated
Postcode
SL6 9UB

Site history

Applications at this address on the Windsor and Maidenhead register

This site has had 7 applications since 2021: 3 approved, 3 refused.

  • 26/01822/PDXL Granted

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Single storey side/rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.80m.

    Decided 28 Aug 2026 Prior approval
  • 26/01823/CPD Awaiting decision

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

    Submitted 24 Jul 2026 Lawful development
  • 26/01170/PDXL Granted

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Single storey rear extension no greater than 8.00m in depth, 3.84m high with an eaves height of 2.78m.

    Decided 4 Jun 2026 Prior approval
  • 26/00048/CPD Refused

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Certificate of lawfulness to determine whether the proposed garage conversion, single storey side extension, single storey rear extension, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

    Decided 9 Mar 2026 Lawful development
  • 22/00347/CPD Granted

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

    Decided 11 Apr 2022 Lawful development
  • 21/03469/CPD Refused

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

    Decided 19 Jan 2022 Lawful development

Timeline

Dates from the published record

  1. 11 May 2026

    Received by Windsor and Maidenhead

  2. 3 Jul 2026

    Decision issued: Refuse

  3. 25 Jul 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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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

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/01822/PDXL Submitted 24 Jul 2026 0m away

    Single storey side/rear extension no greater than 8.00m in depth, 4.00m high with an eaves height of 3.80m.

    Granted Prior approval Extension 16 docs
    Small domestic

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/01170/PDXL Submitted 11 May 2026 1m away

    Single storey rear extension no greater than 8.00m in depth, 3.84m high with an eaves height of 2.78m.

    Granted Prior approval Extension 15 docs
    Small domestic

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/00048/CPD Submitted 8 Jan 2026 1m away

    Certificate of lawfulness to determine whether the proposed garage conversion, single storey side extension, single storey rear extension, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

    Refused Lawful development Extension Loft or dormer 13 docs
    Small domestic

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/01823/CPD Submitted 24 Jul 2026 2m away

    68% historically approved · decision due ~18 Sep

    Certificate of lawfulness to determine whether the proposed garage conversion, alterations to fenestration, 1 no. front dormer and 1 no. rear dormer to facilitate a loft conversion is lawful.

    Awaiting decision Lawful development Loft or dormer Windows or glazing 12 docs

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    22/00347/CPD Submitted 8 Feb 2022 3m away

    Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

    Granted Lawful development 7 docs

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    21/03469/CPD Submitted 24 Nov 2021 3m away

    Certificate of lawfulness to determine whether the proposed detached outbuilding is lawful.

    Refused Lawful development 7 docs

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.

    16 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.

    27 Jul 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.

    27 Jul 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.

    21 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.

    24 Jun 2026 Lawful development