20 Chesham Mews London SW1X 8HS

This site has had 2 applications since 2025: 1 approved, 1 refused.

• 25/08508/ADFULL Refused

  20 Chesham Mews London SW1X 8HS

  Details of new glazing bars and mouldings pursuant to condition 5 of planning permission dated 30 May 2025 (RN: 25/01883/FULL)

  Decided 20 Jan 2026 Full applications

1. 28 Jan 2026

   Received by Westminster

2. 16 Mar 2026

   Decision issued: Application Permitted

3. 21 Jul 2026

   Added to PlanIndex

Westminster granted permission on 16 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.

• 4A Belgrave Mews West London SW1X 8HT

  25/05632/CLOPUD Submitted 12 Aug 2025 50 yards away

  Installation of an air source heat pump at roof level.

  Refused Lawful development 13 docs

• 6 Lowndes Street London SW1X 9ET

  20/06100/ADLBC Submitted 16 Sep 2020 50 yards away

  Details of any ventilation grilles or similar associated with the internal fan coil units; the proposed grilles; where existing original floorboards or floor structure is in place and where underfloor heating is proposed; and revised consistent drawings of chimneypiece and fireplaces pursuant to Condition 4 of listed building consent dated 11 January 2019 (RN: 18/05729/LBC).

  Refused Conditions 7 docs

• 20 Chesham Mews London SW1X 8HS

  25/08508/ADFULL Submitted 20 Nov 2025 50 yards away

  Details of new glazing bars and mouldings pursuant to condition 5 of planning permission dated 30 May 2025 (RN: 25/01883/FULL)

  Refused Full applications Windows or glazing 3 docs

• 15 Chesham Mews London SW1X 8HS

  26/06478/FULL Submitted 22 Sep 2026 50 yards away

  88% historically approved · decision due ~25 Nov

  Erection of a single-storey conservatory at ground floor level incorporating a retractable louvred roof and glazed sliding doors.

  Awaiting decision Full applications Extension Windows or glazing
  Small domestic

• Flat 5 6 West Halkin Street London SW1X 8JA

  25/08069/FULL Submitted 5 Nov 2025 50 yards away

  Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.

  Granted Full applications Windows or glazing 33 docs

• Flat 5 6 West Halkin Street London SW1X 8JA

  25/08070/LBC Submitted 5 Nov 2025 50 yards away

  Alterations to existing flat roof at rear third floor level to form a roof terrace, raising of the parapet, installation of decking and replacement of window with a door at rear third floor level.

  Granted Heritage and listed buildings Windows or glazing 28 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