11 - 12 St James's Square London SW1Y 4LB

This site has had 2 applications since 2025.

• 25/09400/FULL Awaiting decision

  11 - 12 St James's Square London SW1Y 4LB

  External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09401/LBC)

  Submitted 22 Dec 2025 Full applications

1. 22 Dec 2025

   Received by Westminster

2. 20 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 16 February 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.

• 25/09400/FULL Awaiting decision

  11 - 12 St James's Square London SW1Y 4LB

  External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09401/LBC)

  Submitted 22 Dec 2025 Full applications

1 later application on the register refers to this one:

• 25/09400/FULL Awaiting decision

  11 - 12 St James's Square London SW1Y 4LB

  External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09401/LBC)

  Submitted 22 Dec 2025 Full applications

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

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• 11 - 12 St James's Square London SW1Y 4LB

  25/09400/FULL Submitted 22 Dec 2025 50 yards away

  88% historically approved · decision due ~16 Feb

  External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09401/LBC)

  Awaiting decision Full applications Extension 128 docs

• Flat 19 Bray House Duke Of York Street London SW1Y 6JX

  25/08598/FULL Submitted 25 Nov 2025 50 yards away

  Replacement of single glazed steel crittall windows with double glazed windows.

  Granted Full applications Windows or glazing 20 docs

• Flat 11 Bray House Duke Of York Street London SW1Y 6JX

  26/05463/FULL Submitted 11 Aug 2026 50 yards away

  Installation of replacement windows to the third floor rear and side elevations.

  Decided Full applications Windows or glazing

• Flat 6 Bray House Duke Of York Street London SW1Y 6JX

  26/05843/FULL Submitted 25 Aug 2026 50 yards away

  88% historically approved · decision due ~20 Oct

  Installation of replacement windows to the second floor front elevation.

  Decided Full applications Windows or glazing 17 docs

• 13 Mason's Yard London SW1Y 6BU

  26/00842/FULL Submitted 11 Feb 2026 50 yards away

  88% historically approved · decision due ~5 Jun

  Installation of four condenser units at roof level.

  Awaiting decision Full applications 13 docs

• 3 Ormond Yard London SW1Y 6JT

  20/07962/ADFULL Submitted 14 Dec 2020 50 yards away

  Details of the colours and finishes of the roof and walls of the extension; section profiles of frames and transoms of the new doors, as well as their colour and finish; the treatment of the verge of the extension, including its material, colour and finish; pursuant to condition 3 of planning permission granted at appeal dated 26 October 2020 (RN: 19/00825/HASREF).

  Granted Full applications Extension 8 docs

• 26/07529/LBC Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water supply pipe on rear courtyard elevation. (Linked with 26/07528/FULL)

  Received 5 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07509/LBC 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 26/07508/FULL)

  Received 4 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07473/LBC Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07472/FULL)

  Received 3 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07471/LBC Awaiting decision

  12 Queen Anne's Gate London SW1H 9AA

  Excavation of single-storey basement, internal reconfiguration and installation of modern services. (Linked with 26/07470/FULL)

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07461/LBC Awaiting decision

  1 Savile Row London W1S 3JR

  Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings