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Planning application

1 Grange Lane Cookham Maidenhead SL6 9RP

Granted Windsor and Maidenhead 26/00633/CPD Cert of Lawfulness of Proposed Dev

Works: Extension

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

Proposal

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

As published by the council, reference 26/00633/CPD

Application record

Reference
26/00633/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Granted As published: Permitted Development
Received
10 Mar 2026
Validated
13 Mar 2026
Decided
18 Mar 2026
Ward
Bisham And Cookham
Parish
Cookham Parish
Decision by
Delegated
Postcode
SL6 9RP

Site history

Applications at this address on the Windsor and Maidenhead register

This site has had 6 applications since 2024: 3 approved, 3 refused.

  • 26/01894/PDXL Granted

    1 Grange Lane Cookham Maidenhead SL6 9RP

    1No. single storey rear extension and 1No. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Decided 3 Sep 2026 Prior approval
  • 26/01067/PDXL Refused

    1 Grange Lane Cookham Maidenhead SL6 9RP

    1no. single storey rear extension and 1no. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Decided 29 May 2026 Prior approval
  • 26/00634/PDXL Refused

    1 Grange Lane Cookham Maidenhead SL6 9RP

    2no. single storey side/rear extensions no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m following demolition of existing garage.

    Decided 22 Apr 2026 Prior approval
  • 26/00632/PDXL Granted

    1 Grange Lane Cookham Maidenhead SL6 9RP

    Single storey rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Decided 20 Apr 2026 Prior approval
  • 24/03027/PDXL Refused

    1 Grange Lane Cookham Maidenhead SL6 9RP

    Single storey side/rear extension no greater than 8m in depth, 3.5m high with an eaves height of 2.8m.

    Decided 24 Jan 2025 Prior approval

Timeline

Dates from the published record

  1. 10 Mar 2026

    Received by Windsor and Maidenhead

  2. 13 Mar 2026

    Validated

    Checked as complete and ready for consideration.

  3. 18 Mar 2026

    Decision issued: Permitted Development

  4. 25 Jul 2026

    Added to PlanIndex

Documents

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

10 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What this grant of permission means

Windsor and Maidenhead granted permission on 18 March 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 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 0.3 miles

  • 1 Grange Lane Cookham Maidenhead SL6 9RP

    26/01067/PDXL Submitted 30 Apr 2026 50 yards away

    1no. single storey rear extension and 1no. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Refused Prior approval Extension 11 docs
    Small domestic

  • 1 Grange Lane Cookham Maidenhead SL6 9RP

    26/00634/PDXL Submitted 10 Mar 2026 50 yards away

    2no. single storey side/rear extensions no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m following demolition of existing garage.

    Refused Prior approval Extension Demolition 11 docs
    Small domestic

  • 1 Grange Lane Cookham Maidenhead SL6 9RP

    24/03027/PDXL Submitted 9 Dec 2024 50 yards away

    Single storey side/rear extension no greater than 8m in depth, 3.5m high with an eaves height of 2.8m.

    Refused Prior approval Extension 9 docs
    Small domestic

  • 1 Grange Lane Cookham Maidenhead SL6 9RP

    26/01894/PDXL Submitted 3 Aug 2026 50 yards away

    1No. single storey rear extension and 1No. single storey side/rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Granted Prior approval Extension 12 docs
    Small domestic

  • 1 Grange Lane Cookham Maidenhead SL6 9RP

    26/00632/PDXL Submitted 10 Mar 2026 50 yards away

    Single storey rear extension no greater than 8.00m in depth, 3.50m high with an eaves height of 2.50m.

    Granted Prior approval Extension 11 docs
    Small domestic

  • 2 Grange Lane Cookham Maidenhead SL6 9RP

    26/00982/CPD Submitted 21 Apr 2026 50 yards away

    Certificate of lawfulness to determine whether the proposed replacement front porch, two storey rear extension, single storey side extension, 1no. rear Juliet balcony and alterations to fenestration following demolition of existing front porch and garage are lawful.

    Granted Lawful development Extension Demolition +1 16 docs
    Small domestic

In Windsor and Maidenhead

  • 26/02222/CPD Refused

    52 Audley Way Ascot SL5 8EF

    Certificate of lawfulness to determine whether the proposed single storey rear extension following the removal of the existing conservatory is lawful.

    Received 8 Sep, published by the council 24 Sep 2026 Lawful development
  • 26/01954/CPD Withdrawn

    Mulberry House Waltham Road Maidenhead SL6 3NH

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

    Received 7 Aug, published by the council 16 Aug 2026 Lawful development
  • 26/01856/CLU Granted

    Apple Tree Cottage And Land Adjacent To Apple Tree Cottage Paley Street Maidenhead

    Certificate of lawfulness to determine whether the existing use of the land as a residential garden incidental to the main dwelling is lawful

    Received 28 Jul, published by the council 24 Aug 2026 Lawful development
  • 26/02022/CPD Refused

    14 Church View White Waltham Maidenhead SL6 3JQ

    Certificate of lawfulness to determine whether the proposed 1no. rear dormer and alterations to fenestration are lawful

    Received 17 Aug, published by the council 2 Sep 2026 Lawful development
  • 26/01862/CLU Granted

    Holyport Pre School Holyport Youth Club Moneyrow Green Holyport Maidenhead SL6 2NA

    Certificate of lawfulness to determine whether the existing use of the site as a pre-school is lawful.

    Received 29 Jul, published by the council 4 Aug 2026 Lawful development