9 Cavendish Square London W1G 9DF

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
• 25/05090/FULL Granted

  9 Cavendish Square London W1G 9DF

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

  Decided 19 Sep 2025 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

1. 19 May 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 14 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

   Westminster took a median of 91 days over the applications it decided in the last year.

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

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.

• 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

• 9 Cavendish Square London W1G 9DF

  07/03941/ADFULL Submitted 3 May 2007 50 yards away

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

  Granted Full applications 4 docs

• 9 Cavendish Square London W1G 9DF

  07/01852/ADFULL Submitted 27 Feb 2007 50 yards away

  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).

  Granted Full applications 7 docs

• 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