49 - 51 Leinster Square London W2 4PU

This site has had 2 applications since 2026.

• 26/06220/LBC Awaiting decision

  49 - 51 Leinster Square London W2 4PU

  Alterations to rear basement area across all 3 buildings, including removal of existing rooflights and creation of 3 lightwells, basement elevation alterations and landscaping changes. Internal works (Linked to 26/06219/FULL)

  Submitted 10 Sep 2026 Heritage and listed buildings

1. 10 Sep 2026

   Received by Westminster

2. 21 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 5 November 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.

• 26/06220/LBC Awaiting decision

  49 - 51 Leinster Square London W2 4PU

  Alterations to rear basement area across all 3 buildings, including removal of existing rooflights and creation of 3 lightwells, basement elevation alterations and landscaping changes. Internal works (Linked to 26/06219/FULL)

  Submitted 10 Sep 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/06220/LBC Awaiting decision

  49 - 51 Leinster Square London W2 4PU

  Alterations to rear basement area across all 3 buildings, including removal of existing rooflights and creation of 3 lightwells, basement elevation alterations and landscaping changes. Internal works (Linked to 26/06219/FULL)

  Submitted 10 Sep 2026 Heritage and listed buildings

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.

• Fourth Floor Flat 44 Leinster Square London W2 4PU

  26/04426/FULL Submitted 3 Jul 2026 50 yards away

  88% historically approved · decision due ~3 Sep

  Installation of railings and retention of timber decking in association with use of roof terrace (part retrospective) [Linked to 26/04427/LBC]

  Decided Full applications 25 docs

• Fourth Floor Flat 44 Leinster Square London W2 4PU

  26/04427/LBC Submitted 3 Jul 2026 50 yards away

  Installation of railings and retention of timber decking in association with use of roof terrace (part retrospective) [Linked to 26/04426/FULL]

  Decided Heritage and listed buildings 25 docs

• 49 - 51 Leinster Square London W2 4PU

  26/06220/LBC Submitted 10 Sep 2026 50 yards away

  90% historically approved · decision due ~5 Nov

  Alterations to rear basement area across all 3 buildings, including removal of existing rooflights and creation of 3 lightwells, basement elevation alterations and landscaping changes. Internal works (Linked to 26/06219/FULL)

  Awaiting decision Heritage and listed buildings Loft or dormer

• Flat 7 42 Leinster Square London W2 4PU

  26/03450/LBC Submitted 26 May 2026 50 yards away

  90% historically approved · decision due ~26 Jul

  Retrospective application for alterations to top floor flat including removal of ceiling in reception room and bedroom; installation of mezzanine to bedroom; creation of escape dormer in roof space; insertion of rooflights and associated works.

  Awaiting decision Heritage and listed buildings Loft or dormer 29 docs

• Flat 4 52 - 53 Leinster Square London W2 4PU

  25/08114/LBC Submitted 6 Nov 2025 50 yards away

  Internal alterations to reconfigure the layout of the second floor flat including the addition of 1no. bedroom and relocation of the kitchen including upgrades to existing lighting and small power, and lowering of the kitchen floor.

  Granted Heritage and listed buildings 21 docs

• 63 Prince's Square London W2 4PX

  25/07611/CLEUD Submitted 21 Oct 2025 50 yards away

  Use of 63 Princes Square as a hostel providing visitor accommodation (tourist accommodation).

  Granted Lawful development 18 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