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Planning application

Timber House Hills Lane Cookham Maidenhead SL6 9NX

Refused Windsor and Maidenhead 25/03355/CPD Cert of Lawfulness of Proposed Dev

Works: Extension 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 rear extension and single storey outbuilding incidental to the main dwelling is lawful.

As published by the council, reference 25/03355/CPD

Application record

Reference
25/03355/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Refuse
Received
16 Dec 2025
Validated
17 Dec 2025
Decided
5 Jan 2026
Ward
Bisham And Cookham
Parish
Cookham Parish
Decision by
Delegated
Postcode
SL6 9NX

Timeline

Dates from the published record

  1. 16 Dec 2025

    Received by Windsor and Maidenhead

  2. 17 Dec 2025

    Validated

    Checked as complete and ready for consideration.

  3. 5 Jan 2026

    Decision issued: Refuse

  4. 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 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

  • Elm Cottage Hills Lane Cookham Maidenhead SL6 9NX

    26/00229/FULL Submitted 27 Jan 2026 32m away

    Alteration to the main roof, side wall, chimney, bay window and fenestration following demolition of existing internal elements, to the cottage ancillary the main dwellinghouse.

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  • Hardings Cottage Hills Lane Cookham Maidenhead SL6 9NX

    22/02830/FULL Submitted 21 Oct 2022 79m away

    Single storey rear extension, increase to the exisiting habitable accommodation within the roofspace, 1no. rear dormer with Juliet balcony and alterations to fenestration.

    Withdrawn Full applications Extension Loft or dormer +1 16 docs
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  • Hardings Cottage Hills Lane Cookham Maidenhead SL6 9NX

    21/02872/CPD Submitted 24 Sep 2021 80m away

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

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  • Hardings Cottage Hills Lane Cookham Maidenhead SL6 9NX

    26/01404/TCA Submitted 8 Jun 2026 85m away

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    Granted Trees 9 docs
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    21/01878/FULL Submitted 17 Jun 2021 117m away

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    Granted Full applications Windows or glazing 16 docs
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    22/00077/TCA Submitted 12 Jan 2022 141m away

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In Windsor and Maidenhead

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    25 Feb 2026 Lawful development
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    17 Jul 2026 Lawful development
  • 26/01615/CLU Granted

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

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    26 Jun 2026 Lawful development
  • 26/02117/CPD Awaiting decision

    27 Tyrell Gardens Windsor SL4 4DH

    Certificate of lawfulness to determine whether the proposed garage conversion is lawful.

    26 Aug 2026 Lawful development