Basement And Ground Floor 12 Mount Street London W1K 2RD

This site has had 2 applications since 2026.

• 26/00990/FULL Awaiting decision

  Basement And Ground Floor 12 Mount Street London W1K 2RD

  Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00991/LBC]

  Submitted 17 Feb 2026 Full applications

1. 17 Feb 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 14 April 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.

• 26/00990/FULL Awaiting decision

  Basement And Ground Floor 12 Mount Street London W1K 2RD

  Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00991/LBC]

  Submitted 17 Feb 2026 Full applications

1 later application on the register refers to this one:

• 26/00990/FULL Awaiting decision

  Basement And Ground Floor 12 Mount Street London W1K 2RD

  Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00991/LBC]

  Submitted 17 Feb 2026 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.

• Basement And Ground Floor 12 Mount Street London W1K 2RD

  26/00990/FULL Submitted 17 Feb 2026 50 yards away

  88% historically approved · decision due ~14 Apr

  Retrospective consent for the installation of an external condenser unit at lower ground floor level in the front lightwell and internal alterations at lower ground floor level. [Linked to 26/00991/LBC]

  Awaiting decision Full applications 14 docs

• 11 Mount Street London W1K 2RB

  26/01651/LBC Submitted 13 Mar 2026 50 yards away

  90% historically approved · decision due ~10 Jun

  Installation of automatic opening fire vent at top floor of 11 Mount Street accommodation and fire exit stair core to residential apartments which occupy 1st floor to roof level. [Linked to 26/01869/FULL]

  Awaiting decision Heritage and listed buildings New dwelling 16 docs

• 11 Mount Street London W1K 2RB

  26/01869/FULL Submitted 23 Mar 2026 50 yards away

  88% historically approved · decision due ~10 Jun

  Installation of automatic opening fire vent at top floor of 11 Mount Street accommodation and fire exit stair core to residential apartments which occupy 1st floor to roof level. [Linked to 26/01651/LBC]

  Awaiting decision Full applications New dwelling 16 docs

• Flat 1 11 Mount Street London W1K 2RB

  12/05083/LBC Submitted 11 May 2012 50 yards away

  Internal alterations at first floor level

  Granted Heritage and listed buildings 4 docs

• Connaught Hotel Carlos Place London W1K 2AL

  20/07842/ADV Submitted 8 Dec 2020 50 yards away

  Display of one non-illuminated fascia sign measuring 0.3m x 1.5m for a temporary period between 01 December 2020 and 04 January 2021. Linked to 20/07630/FULL

  Decided Advertising 10 docs

• 14 Mount Street London W1K 2RF

  25/06838/FULL Submitted 24 Sep 2025 50 yards away

  Installation of a small wall mounted air conditioning unit located on exterior wall within an enclosed lightwell at first floor level to 14-16 Mount Street. Linked with 25/06839/LBC

  Withdrawn Full applications 10 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