39 Westminster Mansions Great Smith Street London SW1P 3BP

1. 3 Jul 2026

   Received by Westminster

2. 20 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. 11 Sep 2026

   Status changed to Decided

   Previously Pending.

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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.

• Hope House 45 Great Peter Street London SW1P 3LT

  26/01999/TELNOT Submitted 3 Mar 2026 50 yards away

  The removal and replacement of 3no. antennas and associated ancillary equipment thereto.

  Decided Telecoms 3 docs

• Flat 10 Tufton Court 41 - 51 Tufton Street London SW1P 3QH

  26/01462/FULL Submitted 6 Mar 2026 100 yards away

  88% historically approved · decision due ~1 May

  Replacement of sash windows to front elevation, with integral glazing bar. Existing window frames to be retained.

  Awaiting decision Full applications Windows or glazing 10 docs

• 1 Barton Street London SW1P 3NG

  26/05942/FULL Submitted 1 Sep 2026 100 yards away

  88% historically approved · decision due ~27 Oct

  Change of use from Class C3 Residential to Class F1(a) Education and external alterations. (Linked with listed building consent 26/05943/LBC and part of a land use package with planning application 26/05938/FULL for 24 Vincent Square)

  Awaiting decision Full applications

• 1 Barton Street London SW1P 3NG

  26/05943/LBC Submitted 1 Sep 2026 100 yards away

  90% historically approved · decision due ~27 Oct

  Internal and external alterations, associated with use of the building as Class F1(a) Education. (Linked with planning application 26/05942/FULL)

  Awaiting decision Heritage and listed buildings

• Church House Conference Centre Dean's Yard London SW1P 3NZ

  25/06523/LBC Submitted 11 Sep 2025 100 yards away

  Installation of air handling unit at roof level and associated internal works.

  Granted Heritage and listed buildings 17 docs

• Church House Conference Centre Dean's Yard London SW1P 3NZ

  25/06522/FULL Submitted 11 Sep 2025 100 yards away

  Installation of air handling unit at roof level.

  Granted Full applications 19 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