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Planning application

Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

Granted Windsor and Maidenhead 26/01170/PDXL Permitted Development Extended

Works: Extension Small domestic

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

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

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

As published by the council, reference 26/01170/PDXL

Application record

Reference
26/01170/PDXL
Type
Permitted Development Extended
Status
Decided
Decision
Prior Approval Not Required
Received
11 May 2026
Validated
11 May 2026
Decided
4 Jun 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
  • 26/01169/CPD Refused

    Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    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.

    Decided 3 Jul 2026 Lawful development
  • 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. 4 Jun 2026

    Decision issued: Prior Approval Not Required

  3. 25 Jul 2026

    Added to PlanIndex

Documents

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

15 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.

Trade members open them from here.

Open the documents

What this grant of permission means

Windsor and Maidenhead granted permission on 4 June 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.

About prior approval applications

Prior approval applies where permitted development rights already grant the principle of the work, leaving the council only the specific matters the rules name, commonly within 56 days. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/00048/CPD Submitted 8 Jan 2026 0m 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 1m 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 1m 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

    26/01822/PDXL Submitted 24 Jul 2026 1m 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

    21/03469/CPD Submitted 24 Nov 2021 1m away

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

    Refused Lawful development 7 docs

  • Highwood Corner Grubwood Lane Cookham Maidenhead SL6 9UB

    26/01169/CPD Submitted 11 May 2026 1m away

    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.

    Refused Lawful development Extension Loft or dormer +1 14 docs
    Small domestic

In Windsor and Maidenhead

  • 26/01684/PDXL Refused

    9 Duncroft Windsor SL4 4HH

    Single storey rear extension no greater than 6.00m in depth, 3.20m high with an eaves height of 2.90m.

    10 Jul 2026 Prior approval
  • 26/01861/PDXL Granted

    6 Hendons Way Holyport Maidenhead SL6 2LF

    Single storey rear extension no greater than 6.00m in depth, 2.78m high with an eaves height of 2,70m.

    29 Jul 2026 Prior approval
  • 26/01912/PDXL Granted

    Fourwinds 2 Green Lane Ascot SL5 7QJ

    Single storey rear extension no greater than 7.46m in depth, 3.20m high with an eaves height of 2.45m.

    3 Aug 2026 Prior approval
  • 26/01789/PDXL Granted

    6 The Dell Maidenhead SL6 3NS

    Single storey rear extension no greater than 3.76m in depth, 2.90m high with an eaves height of 2.90m.

    22 Jul 2026 Prior approval
  • 26/01831/PDXL Granted

    1 Bell View Windsor SL4 4ET

    Single storey rear extension no greater than 4.30m in depth, 2.80m high with an eaves height of 2.50m.

    27 Jul 2026 Prior approval