35 Hay's Mews London W1J 5PY

1. 6 Aug 2026

   Received by Westminster

2. 11 Aug 2026

   Validated

   Checked as complete and ready for consideration.

3. 12 Aug 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 6 October 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.

• 21 Charles Street London W1J 5DT

  25/06733/NMA Submitted 18 Sep 2025 50 yards away

  Amendments to planning permission dated 22nd September 2011 (RN:11/07285/FULL) for Extension of time for the commencement of development granted planning permission on 24 December 2008 (extant permission: RN: 08/06804); namely, external alterations to existing dwelling at 21 Charles St and 21 Hays Mews including demolition and redevelopment of the mews building (retaining the front facade) to create sub basement, lower basement, ground to second floors including a mansard roof in connection with the use of the building for residential purposes (Class C3). Creation of link at ground floor level and terrace at first floor level within courtyard area. Installation of plant at roof level of No. 21 Charles Street. Namely; to relocate the listed approved drawings and documents so they are a condition on the planning permission.

  Granted Amendments Loft or dormer Demolition 19 docs
  Domestic

• The Lodge Chesterfield Hill London W1J 5BS

  12/00413/NMA Submitted 13 Jan 2012 50 yards away

  Amendments to planning permission dated 14 August 2008 (RN:08/04924), namely to replace the front door with a panelled door; replace one garage door with a window; to incorporate timber louvers on another door and to make all garage doors boarded.

  Refused Amendments Windows or glazing 5 docs

• The Lodge Chesterfield Hill London W1J 5BS

  23/08508/ADFULL Submitted 7 Dec 2023 50 yards away

  88% historically approved · decision due ~1 Feb

  Detailed site investigation to find out if the building or land are contaminated with Radon pursuant to Condition 15 of planning permission dated 13th February 2023 (RN:22/08253/FULL)

  Awaiting decision Full applications 6 docs

• The Lodge Chesterfield Hill London W1J 5BS

  23/06396/ADFULL Submitted 15 Sep 2023 50 yards away

  88% historically approved · decision due ~10 Nov

  Details of Code of Construction Practice pursuant to Condition 9 of planning permission dated 13 February 2023 (RN:l22/08253/FULL)

  Awaiting decision Full applications 3 docs

• The Lodge Chesterfield Hill London W1J 5BS

  23/05601/ADFULL Submitted 11 Aug 2023 50 yards away

  Details to identify adjacent LU structures and tunnels and provide ground movement impact assessment due to load changes, heave and settlement both temporary and permanent which may affect adjacent LU structures and tunnels; mitigate the effects of noise and vibration from construction; mitigate the effects of noise and vibration arising from operation within the railway structures and tunnels and; provide details to ensure no future claims to be made against TfL or London Underground pursuant to Condition 8 of planning permission dated 13 February 2023 (RN: 22/08253/FULL)

  Refused Full applications 10 docs

• The Lodge Chesterfield Hill London W1J 5BS

  07/05989/FULL Submitted 9 Jul 2007 50 yards away

  Demolition and rebuilding behind retained front facade to provide a five-storey (including basement) single family dwelling with new mansard roof and rear roof terrace. [Site includes 31 Hay's Mews]

  Withdrawn Full applications Loft or dormer Demolition 23 docs
  Domestic

• 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