75 Cumberland Street London SW1V 4NB

1. 1 Dec 2025

   Received by Westminster

2. 12 Mar 2026

   Decision issued: Application Permitted

3. 20 Jul 2026

   Added to PlanIndex

Westminster granted permission on 12 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

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.

• 6C Winchester Street London SW1V 4ND

  26/00744/FULL Submitted 9 Feb 2026 50 yards away

  Replacement of French windows to front elevation and sash window to rear at first floor level.

  Granted Full applications Windows or glazing 18 docs

• 74 Cumberland Street London SW1V 4NA

  25/08132/FULL Submitted 7 Nov 2025 50 yards away

  Replacement of existing windows with new heritage timber box sash windows

  Granted Full applications Windows or glazing 27 docs

• 90 Gloucester Street London SW1V 4ED

  25/08133/FULL Submitted 7 Nov 2025 50 yards away

  Installation of replacement existing windows with new timber box sash and timber casement double-glazed windows.

  Granted Full applications Windows or glazing 20 docs

• 74 Lupus Street London SW1V 3EL

  25/08768/FULL Submitted 2 Dec 2025 50 yards away

  Use of lower ground and ground floor as one residential unit (Class C3), reinstatement of lightwells and railings, installation of replacement shopfront, fenestration, new external metal stair, and associated alterations.

  Granted Full applications Windows or glazing 62 docs

• 76 Gloucester Street London SW1V 4EF

  25/08920/FULL Submitted 8 Dec 2025 50 yards away

  88% historically approved · decision due ~2 Feb

  Erection of mansard roof above the single storey infill to enlarge first floor flat, erection of a mansard roof to main roof to enlarge existing HMO accommodation, alterations to fenestration, works to lightwell steps and other associated works.

  Awaiting decision Full applications Extension Loft or dormer +1 34 docs
  Small domestic

• 137 Lupus Street London SW1V 3HE

  25/07237/COGADF Submitted 7 Oct 2025 50 yards away

  Details of aluminium overcladding to the timber columns pursuant to Condition 4 of planning permission dated 25 April 2025 (RN: 24/07993/COFUL).

  Granted Full applications 7 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