12 Leinster Mews London W2 3EY

1. 3 Mar 2026

   Received by Westminster

2. 16 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 11 May 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 90 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 Leinster Mews London W2 3EY

  26/01136/FULL Submitted 23 Feb 2026 50 yards away

  Installation of metal railing at roof level for maintenance and cleaning.

  Granted Full applications 20 docs

• 18 Leinster Mews London W2 3EY

  25/08697/FULL Submitted 28 Nov 2025 50 yards away

  88% historically approved · decision due ~12 Mar

  Internal and external alterations comprising the construction of a basement and remodelling the dwelling.

  Awaiting decision Full applications 45 docs
  Domestic

• 23 Craven Hill London W2 3EN

  26/01222/LBC Submitted 26 Feb 2026 50 yards away

  90% historically approved · decision due ~23 Apr

  Installation of roof-mounted acoustic louvres to existing shed to serve air conditioning plant. [Linked to 26/01222/LBC]

  Awaiting decision Heritage and listed buildings 9 docs
  Small domestic

• 23 Craven Hill London W2 3EN

  26/01221/FULL Submitted 26 Feb 2026 50 yards away

  88% historically approved · decision due ~23 Apr

  Installation of roof-mounted acoustic louvres to existing shed to serve air conditioning plant. [Linked to 26/01221/FULL]

  Awaiting decision Full applications 11 docs
  Small domestic

• 66 - 71 Lancaster Gate London W2 3NA

  26/02335/ADV Submitted 9 Apr 2026 50 yards away

  82% historically approved · decision due ~4 Jun

  Display of a non-illuminated fascia sign measuring 0.22m x 2.5m. [Linked to 26/00910/LBC]

  Awaiting decision Advertising 10 docs

• 66 - 71 Lancaster Gate London W2 3NA

  26/00910/LBC Submitted 13 Feb 2026 50 yards away

  90% historically approved · decision due ~10 Apr

  Installation of new, replacement signage and external Flags at Lancaster Gate Hotel.

  Awaiting decision Heritage and listed buildings 11 docs

• 26/06234/FULL Decided

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  Received 11 Sep, published by the council 18 Sep 2026 Full applications
• 26/07403/FULL Awaiting decision

  Basement Floor And Ground Floor Queen Annes House 34 Queen Anne's Gate London SW1H 9AB

  Refurbishment and enhancement of the building to facilitate its continued use as offices with ancillary residential accommodation, together with associated conservation, restoration, accessibility improvements, building services upgrades, landscaping and ancillary works. Internal and external alterations associated with the repair. (Linked with 26/07404/LBC)

  Received 30 Oct, published by the council 3 Nov 2026 Full applications
• 26/07415/FULL Awaiting decision

  39 Montagu Square London W1H 2LL

  Amalgamation of Flats 3 and 4 (Use Class C3) to form one single dwelling (Use Class C3) including associated internal reconfiguration and refurbishments, alterations to access arrangements and improvements to the existing terrace and private amenity spaces and other associated works. (Linked with 26/07416/LBC)

  Received 30 Oct, published by the council 3 Nov 2026 Full applications
• 26/07397/FULL Awaiting decision

  8 Mortimer Street London W1T 3JJ

  External alterations at level six including the installation of a screen, additional access doors and revised lighting. 2 Fitzroy Place (8 Mortimer Street)

  Received 29 Oct, published by the council 3 Nov 2026 Full applications
• 26/07401/FULL Awaiting decision

  82 Jermyn Street London SW1Y 6JD

  Use of the ground floor unit as a drinking establishment (Sui Generis).

  Received 29 Oct, published by the council 3 Nov 2026 Full applications