3 Chester Square Mews London SW1W 9DS

This site has had 2 applications since 2026.

• 26/03240/ADLBC Awaiting decision

  3 Chester Square Mews London SW1W 9DS

  Detailed drawings of construction and window details of the new dormers to the mews; new garage doors; and New window and door to the ground floor mews elevation pursuant to conditon 4, a, b, c of listed building consent dated 22nd January 2025 (RN 24/08101/LBC)

  Submitted 18 May 2026 Conditions

1. 18 May 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 13 July 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.

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.

• 3 Chester Square Mews London SW1W 9DS

  26/03240/ADLBC Submitted 18 May 2026 50 yards away

  89% historically approved · decision due ~13 Jul

  Detailed drawings of construction and window details of the new dormers to the mews; new garage doors; and New window and door to the ground floor mews elevation pursuant to conditon 4, a, b, c of listed building consent dated 22nd January 2025 (RN 24/08101/LBC)

  Awaiting decision Conditions Loft or dormer Windows or glazing 10 docs

• 9 Chester Square Mews London SW1W 9DS

  23/03323/FULL Submitted 18 May 2023 50 yards away

  Alterations to the ground floor front elevation, including replacement of windows and a door set, removal of a window/increase in the associated opening and application of rendered details.

  Withdrawn Full applications Windows or glazing 20 docs

• 81 Chester Square London SW1W 9DP

  23/04554/CLOPUD Submitted 4 Jul 2023 50 yards away

  Re-routing soil pipe within lower ground floor ceiling; creation of a new bulkhead to contain soil pipe and ventilation pipes internally; and new opening in the facade for soil pipe to exit the building.

  Granted Lawful development 11 docs

• 79 Chester Square London SW1W 9DU

  26/02993/ADFULL Submitted 7 May 2026 50 yards away

  88% historically approved · decision due ~2 Jul

  Details of new interior, which must be appropriate to the period of the building and their location; pursuant to condition 5 (part iii) of planning permission dated 5th January 2023 (RN 22/05927/FULL)

  Awaiting decision Full applications 4 docs

• 33 Lower Belgrave Street London SW1W 0LS

  26/04617/FULL Submitted 10 Jul 2026 50 yards away

  88% historically approved · decision due ~4 Sep

  Replacement front, rear and side elevation windows with double glazed timber sashes and main entrance door with solid timber door with double glazed fan light.

  Decided Full applications Windows or glazing

• 33 Lower Belgrave Street London SW1W 0LS

  25/07453/FULL Submitted 15 Oct 2025 50 yards away

  Removal of a rear window between ground and first floor level. (Retrospective)

  Granted Full applications Windows or glazing 27 docs

• 26/06234/FULL Decided

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  Received 11 Sep, published by the council 18 Sep 2026 Full applications
• 26/06015/FULL Decided

  129 Saltram Crescent London W9 3JT

  Erection of a two-storey rear extension.

  Received 3 Sep, published by the council 11 Sep 2026 Full applications
• 26/07382/FULL Awaiting decision

  90 Gloucester Place London W1U 6HS

  Use of the building as an embassy (sui generis)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07363/FULL Awaiting decision

  36 Kilravock Street London W10 4HX

  Demolition of existing rear/side extension and construction of a new extension together with new glazing and doors, and changing the existing rooflights to the rear roof slope with new rooflights.

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07371/FULL Awaiting decision

  8A Randolph Road London W9 1AN

  Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07372/LBC)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications