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Planning application

May Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

Granted Windsor and Maidenhead 25/03367/CPD Cert of Lawfulness of Proposed Dev

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

Certificate of lawfulness to determine whether the proposed single storey rear extension with habitable accommodation in the roofspace is lawful.

As published by the council, reference 25/03367/CPD

Application record

Reference
25/03367/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Permitted Development
Received
19 Dec 2025
Validated
19 Dec 2025
Decided
6 Feb 2026
Ward
Bisham And Cookham
Parish
Bisham Parish
Decision by
Delegated
Postcode
SL6 9UD

Timeline

Dates from the published record

  1. 19 Dec 2025

    Received by Windsor and Maidenhead

  2. 6 Feb 2026

    Decision issued: Permitted Development

  3. 11 Aug 2026

    Added to PlanIndex

Documents

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

7 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 a grant of permission means

The process from here

Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.

Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.

About lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • May Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    26/01042/CPD Submitted 28 Apr 2026 0m away

    Certificate of lawfulness to determine whether the proposed 4no. outbuildings incidental to the main dwelling and 1no. pool and hot tub following demolition of existing outbuildings are lawful.

    Granted Lawful development Demolition 9 docs
    Domestic

  • May Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    25/03029/CPD Submitted 17 Nov 2025 0m away

    Certificate of lawfulness to determine whether the proposed single storey side extension, single storey rear extension and insertion of 3 no. rooflight windows are lawful.

    Granted Lawful development Extension Loft or dormer +1 8 docs
    Small domestic

  • May Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    25/02166/CPD Submitted 26 Aug 2025 0m away

    Certificate of lawfulness to determine whether the proposed single storey rear extension, single storey side extension and 4no. rooflights are lawful.

    Refused Lawful development Extension Loft or dormer 11 docs
    Small domestic

  • May Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    26/01948/FULL Submitted 7 Aug 2026 2m away

    71% historically approved · decision due ~2 Oct

    Relocation of the front entrance door, replacement front canopy with 1no. dormer above, single storey rear extension, single storey front/side extension with new steps, 1no. additional side dormer, 1no. rear dormer and alterations to fenestration and external finish following demolition of existing elements.

    Awaiting decision Full applications Extension Loft or dormer +2 13 docs
    Small domestic

  • Fernie Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    22/02843/FULL Submitted 24 Oct 2022 76m away

    Garage conversion, part two storey, part first floor rear extension and alterations to fenestration.

    Granted Full applications Extension Windows or glazing 13 docs

  • Fernie Cottage Grubwood Lane Cookham Maidenhead SL6 9UD

    22/02109/CPD Submitted 1 Aug 2022 78m away

    Certificate of lawfulness to determine whether the proposed garage conversion, and two storey rear extension with accommodation wthin the roofspace is lawful.

    Granted Lawful development Extension 8 docs

In Windsor and Maidenhead

  • 26/01615/CLU Granted

    Riding Court Farm Riding Court Riding Court Road Datchet Slough SL3 9JT

    Certificate of lawfulness to determine whether the existing units 'JKL' (use class B8) used for storage and distribution; unit 'AB' (use class B8) used for hiring, maintaining, and cleaning concrete screed and machinery and 'storage yard 2' (use class B8) used for the storage of scaffolding is lawful.

    1 Jul 2026 Lawful development
  • 26/01581/CLD Granted

    The George Public House The Brewhouse The Green Holyport Road Holyport Maidenhead

    Certificate of lawfulness to determine whether the existing bollard is lawful.

    26 Jun 2026 Lawful development
  • 26/01389/CLD Granted

    Redwood 88 Bolton Road Windsor SL4 3JG

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

    5 Jun 2026 Lawful development
  • 26/02060/CPD Awaiting decision

    13 Orchard Grove Maidenhead SL6 6DR

    Certificate of lawfulness to determine whether the proposed hip to gable roof alteration, 2 no. front rooflights and 1 no. rear dormer is lawful.

    20 Aug 2026 Lawful development
  • 26/01564/CPD Refused

    Long Chase Farm Ascot Road Holyport Maidenhead SL6 3LA

    Rear two storey extension to Long Chase Farmhouse under Class A of Part 1 of the GPDO 2015,As Amended.

    25 Jun 2026 Lawful development