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Planning application

9 Cavendish Square London W1G 9DF

Granted Westminster 25/05090/FULL Full Planning Permission Application

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

Proposal

Installation of a non-mechanical louvre at lower ground floor level on the Chandos Street elevation.

As published by the council, reference 25/05090/FULL

Application record

Reference
25/05090/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
22 Jul 2025
Validated
29 Jul 2025
Decided
19 Sep 2025
Ward
Marylebone
Decision by
Delegated Decision
Postcode
W1G 9DF

Site history

Applications at this address on the Westminster register

This site has had 28 applications since 2003: 24 approved, 2 refused.

  • 26/06413/FULL Awaiting decision

    9 Cavendish Square London W1G 9DF

    Installation of louvre grille in place of existing above-door glass panels on the lower ground floor.

    Submitted 18 Sep 2026 Full applications
  • 26/03309/FULL Awaiting decision

    9 Cavendish Square London W1G 9DF

    Installation of CCTV cameras at Ground Floor; and louvres in place of existing windows at Lower Ground Floor (above existing doorset).

    Submitted 19 May 2026 Full applications
  • 24/00959/ADFULL Granted

    9 Cavendish Square London W1G 9DF

    Detailed drawings and a bio-diversity management plan in relation to the green wall to include construction method, layout, species and maintenance regime pursuant to Condition 7 of planning permission dated 8th November 2022 (RN:22/06159/FULL)

    Decided 22 Mar 2024 Full applications
  • 08/02350/FULL Granted

    9 Cavendish Square London W1G 9DF

    Installation of additional security (CCTV, door access systems) at ground and basement level on the Chandos Street and Cavendish Square elevations. Installation of two satellite dishes and one aerial at roof level and two air conditioning units within an existing rooftop enclosure.

    Decided 16 Jul 2008 Full applications
  • 08/00623/ADFULL Granted

    9 Cavendish Square London W1G 9DF

    Details of mortar finish and lightwell finishes pursuant to Conditions 10 and 12(i) of planning permission dated 16 September 2004 (RN: 04/02391).

    Decided 5 Feb 2008 Full applications
  • 07/05669/FULL Granted

    9 Cavendish Square London W1G 9DF

    Installation of eight floodlights at ground floor level to floodlight the Cavendish Square and Chandos Street elevations.

    Decided 5 Sep 2007 Full applications
  • 07/03941/ADFULL Granted

    9 Cavendish Square London W1G 9DF

    Details of external metalwork including railings pursuant to Condition 11 (iii) of planning permission dated 16 September 2004 (RN: 04/02391).

    Decided 31 Jul 2007 Full applications
  • 07/01852/ADFULL Granted

    9 Cavendish Square London W1G 9DF

    Details of an alternative safety arrangement to the parapet at fourth floor level pursuant to Condition 22 of planning permission dated 16 September 2004 (RN: 04/02391).

    Decided 17 Jul 2007 Full applications
  • 07/00645/ADFULL Granted

    9 Cavendish Square London W1G 9DF

    Details of windows, external doors and dormer windows pursuant to Conditions 11(i), 11(ii) and 11(iii) of planning permission dated 16 September 2004 (RN: 04/02391).

    Decided 15 Mar 2007 Full applications
  • 06/04103/ADFULL Refused

    9 Cavendish Square London W1G 9DF

    Detailed drawings of windows and dormer windows pursuant to Conditions 11(i) and (v) of planning permission dated 16 September 2004 (RN 04/02391).

    Decided 3 Nov 2006 Full applications

Timeline

Dates from the published record

  1. 22 Jul 2025

    Received by Westminster

  2. 29 Jul 2025

    Validated

    Checked as complete and ready for consideration.

  3. 19 Sep 2025

    Decision issued: Application Permitted

  4. 21 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Jones Lang LaSalle Limited Agent, registered in London

Active · incorporated 1974 · London

211 applications on PlanIndex · across 36 councils · 92% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

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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.

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What this grant of permission means

Westminster granted permission on 19 September 2025, 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 full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 9 Cavendish Square London W1G 9DF

    26/03309/FULL Submitted 19 May 2026 50 yards away

    88% historically approved · decision due ~14 Jul

    Installation of CCTV cameras at Ground Floor; and louvres in place of existing windows at Lower Ground Floor (above existing doorset).

    Awaiting decision Full applications Windows or glazing 10 docs

  • 9 Cavendish Square London W1G 9DF

    26/06413/FULL Submitted 18 Sep 2026 50 yards away

    88% historically approved · decision due ~13 Nov

    Installation of louvre grille in place of existing above-door glass panels on the lower ground floor.

    Awaiting decision Full applications

  • 9 Cavendish Square London W1G 9DF

    06/04103/ADFULL Submitted 26 May 2006 50 yards away

    Detailed drawings of windows and dormer windows pursuant to Conditions 11(i) and (v) of planning permission dated 16 September 2004 (RN 04/02391).

    Refused Full applications Loft or dormer Windows or glazing 7 docs

  • 9 Cavendish Square London W1G 9DF

    06/03701/ADFULL Submitted 12 May 2006 50 yards away

    Details of facing materials pursuant to Condition 9 of planning permission dated 16 September 2004 (RN 04/02391).

    Granted Full applications 3 docs

  • 9 Cavendish Square London W1G 9DF

    06/02932/ADFULL Submitted 18 Apr 2006 50 yards away

    Details of stonework and other mouldings pursuant to Condition 11(iv) of planning permission dated 16 September 2004 (RN 04/02391).

    Granted Full applications 8 docs

  • 9 Cavendish Square London W1G 9DF

    07/05669/FULL Submitted 28 Jun 2007 50 yards away

    Installation of eight floodlights at ground floor level to floodlight the Cavendish Square and Chandos Street elevations.

    Granted Full applications 10 docs

In Westminster

  • 26/07528/FULL Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

    Received 5 Nov, published by the council 6 Nov 2026 Full applications
  • 26/05200/FULL Decided

    1 The Court House 165 Seymour Place London W1H 4PU

    Installation of waterproofing system to the existing lead flat roofs

    Received 3 Aug, published by the council 28 Aug 2026 Full applications
  • 26/07521/FULL Awaiting decision

    Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

    Installation of one external condenser unit

    Received 4 Nov, published by the council 6 Nov 2026 Full applications
  • 26/07508/FULL Awaiting decision

    Buckingham Palace The Mall London SW1A 1AA

    Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

    Received 4 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07472/FULL Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

    Received 3 Nov, published by the council 6 Nov 2026 Full applications