20 Manchester Square London W1U 3PZ

This site has had 4 applications since 2022: 4 approved, 0 refused.

• 25/08754/NMA Granted

  20 Manchester Square London W1U 3PZ

  Amendments to planning permission dated 04 September 2020 (RN: 20/03854/FULL) for, 'Demolition and replacement of existing fourth floor, demolition of existing plant room, and erection of a single storey roof extension at fifth floor and rear extension at second to fifth floor levels in connection with existing office (Class B1) use, provision of new main office entrance, flexible use of part ground and basement floor for either retail or office use (Class A1/B1), creation of roof terrace at fifth floor level, provision of cycle parking spaces and facilities, roof plant and associated external alterations, including replacement windows'; NAMELY, to reconfigure the basement level shower and cycle parking facilities.

  Decided 13 Jan 2026 Amendments
• 23/01041/ADFULL Granted

  20 Manchester Square London W1U 3PZ

  Detailed design of roof level flues pursuant to Condition 8 of planning permission dated 4 September 2020 (RN:20/03854/FULL)

  Decided 24 Feb 2023 Full applications
• 22/04020/ADFULL Granted

  20 Manchester Square London W1U 3PZ

  Details of pruning works required to the Council's own trees pursuant to condition 23 of planning permission dated 4th September 2020 (RN: 20/03854/FULL)

  Decided 16 Sep 2022 Full applications

1. 16 Aug 2023

   Received by Westminster

2. 31 Aug 2023

   Decision issued: Application Permitted

3. 14 Sep 2026

   Added to PlanIndex

Westminster granted permission on 31 August 2023, 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.

• 20 Manchester Square London W1U 3PZ

  25/08754/NMA Submitted 2 Dec 2025 50 yards away

  Amendments to planning permission dated 04 September 2020 (RN: 20/03854/FULL) for, 'Demolition and replacement of existing fourth floor, demolition of existing plant room, and erection of a single storey roof extension at fifth floor and rear extension at second to fifth floor levels in connection with existing office (Class B1) use, provision of new main office entrance, flexible use of part ground and basement floor for either retail or office use (Class A1/B1), creation of roof terrace at fifth floor level, provision of cycle parking spaces and facilities, roof plant and associated external alterations, including replacement windows'; NAMELY, to reconfigure the basement level shower and cycle parking facilities.

  Granted Amendments Extension Demolition +1 3 docs
  Small domestic

• 26 Manchester Square London W1U 3PZ

  08/04138/AD7 Submitted 8 May 2008 50 yards away

  Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6m x 0.45m.

  Granted Advertising 3 docs

• 26 Manchester Square London W1U 3PZ

  07/01843/LBC Submitted 26 Feb 2007 50 yards away

  Removal of internal partitions and addition of new lightweight partitions and doors. (Site includes No. 1 Manchester Square)

  Granted Heritage and listed buildings 11 docs

• 20 Manchester Square London W1U 3PZ

  23/01041/ADFULL Submitted 17 Feb 2023 50 yards away

  Detailed design of roof level flues pursuant to Condition 8 of planning permission dated 4 September 2020 (RN:20/03854/FULL)

  Granted Full applications 14 docs

• 20 Manchester Square London W1U 3PZ

  22/04020/ADFULL Submitted 20 Jun 2022 50 yards away

  Details of pruning works required to the Council's own trees pursuant to condition 23 of planning permission dated 4th September 2020 (RN: 20/03854/FULL)

  Granted Full applications Trees 12 docs

• 1 Manchester Square London W1U 3PZ

  21/02392/AD7 Submitted 12 Apr 2021 50 yards away

  Display for a temporary period of six months of a non-illuminated sign attached to the railings in front of the building at street level and measuring 0.6m x 0.45m.

  Granted Advertising 6 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