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Planning application

11 St Marks Place Windsor SL4 3BG

Refused Windsor and Maidenhead 21/03537/CPD Cert of Lawfulness of Proposed Dev

Works: Extension Loft or dormer 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 rear extension and x1 front rooflight and x1 rear dormer to facilitate a loft conversion is lawful.

As published by the council, reference 21/03537/CPD

Application record

Reference
21/03537/CPD
Type
Cert of Lawfulness of Proposed Dev
Status
Decided
Decision
Refuse
Received
1 Dec 2021
Validated
1 Dec 2021
Decided
26 Jan 2022
Ward
Eton And Castle
Parish
Windsor Unparished
Decision by
Delegated
Postcode
SL4 3BG

Site history

Applications at this address on the Windsor and Maidenhead register

This site has had 3 applications since 2021: 2 approved, 1 refused.

  • 22/01250/FULL Granted

    11 St Marks Place Windsor SL4 3BG

    x1 front rooflight and x2 rear rooflights.

    Decided 4 Jul 2022 Full applications
  • 22/00172/CPD Granted

    11 St Marks Place Windsor SL4 3BG

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

    Decided 30 Mar 2022 Lawful development

Timeline

Dates from the published record

  1. 1 Dec 2021

    Received by Windsor and Maidenhead

  2. 26 Jan 2022

    Decision issued: Refuse

  3. 16 Aug 2026

    Added to PlanIndex

Documents

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

9 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

  • 11 St Marks Place Windsor SL4 3BG

    22/00172/CPD Submitted 24 Jan 2022 0m away

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

    Granted Lawful development Extension 8 docs
    Small domestic

  • 11 St Marks Place Windsor SL4 3BG

    22/01250/FULL Submitted 9 May 2022 1m away

    x1 front rooflight and x2 rear rooflights.

    Granted Full applications Loft or dormer 11 docs

  • 9 St Marks Place Windsor SL4 3BG

    26/01977/FULL Submitted 11 Aug 2026 5m away

    71% historically approved · decision due ~14 Oct

    Garage conversion and alterations to fenestration.

    Awaiting decision Full applications Windows or glazing 11 docs

  • 17 St Marks Place Windsor SL4 3BG

    21/03447/FULL Submitted 22 Nov 2021 13m away

    x2 front rooflights and x2 rear dormers.

    Granted Full applications Loft or dormer 12 docs

  • 5 And 7 St Marks Road Windsor SL4 3BD

    26/00443/TCA Submitted 18 Feb 2026 20m away

    (T1) Apple (Malus domestica) - crown reduction back to previous pruning points; (T2) Birch (Betula spp) - reduce lateral growth back to the boundary line and (T3) Cherry (Prunus spp) - crown reduction by approximately one third (circa 1-2 metres).

    Granted Trees 6 docs

  • 5 St Marks Road Windsor SL4 3BD

    26/01096/TCA Submitted 5 May 2026 22m away

    Cherry (Prunus spp) - remove.

    Granted Trees 5 docs

In Windsor and Maidenhead

  • 26/00501/CPU Refused

    143 Cookham Road Maidenhead SL6 7EU

    Certificate of lawfulness to determine whether the proposed use of the dwelling as a small childrens home for up to two children and two carers is lawful.

    25 Feb 2026 Lawful development
  • 26/01763/CPU Refused

    Land At The Junction of Warners Hill And Dean Lane Cookham Maidenhead

    Certificate of lawfulness to determine whether the proposed use of the land as an orchard with mobile poultry run and polytunnel is lawful.

    17 Jul 2026 Lawful development
  • 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
  • 26/02117/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