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Planning application

9 Cavendish Square London W1G 9DF

Awaiting decision Westminster 26/03309/FULL Full Planning Permission Application

Works: Windows or glazing

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 26/03309/FULL

Application record

Reference
26/03309/FULL
Type
Full Planning Permission Application
Status
Pending
Received
19 May 2026
Validated
19 May 2026
Ward
Marylebone
Postcode
W1G 9DF

Site history

Applications at this address on the Westminster register

This site has had 27 applications since 2003: 24 approved, 2 refused.

  • 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
  • 06/03701/ADFULL Granted

    9 Cavendish Square London W1G 9DF

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

    Decided 6 Jul 2006 Full applications

Timeline

Dates from the published record

  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 66 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

WSP Ltd Agent, registered in Cobham

Active · incorporated 2001 · Cobham

626 applications on PlanIndex · across 128 councils · 96% granted

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

See their track record

Documents

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

10 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.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

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 91 days. More in our guide to how long planning decisions take.

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

    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

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront with Medication Dispensing Outlet.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications