26 Eastcastle Street London W1W 8DF

1. 11 Sep 2025

   Received by Westminster

2. 30 Oct 2025

   Decision issued: Application Permitted

3. 21 Jul 2026

   Added to PlanIndex

Westminster granted permission on 30 October 2025, 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.

• Basement And Ground Floor 23 - 25 Eastcastle Street London W1W 8DF

  26/02585/ADV Submitted 20 Apr 2026 50 yards away

  84% historically approved · decision due ~15 Jun

  Display of two non-illuminated window posters measuring 3.32m x 2.98m and 3.32m x 3m. (Retrospective)

  Awaiting decision Advertising Windows or glazing 10 docs

• 30 Eastcastle Street London W1W 8DJ

  11/11096/EEN Submitted 14 Nov 2011 50 yards away

  Replacement of roof and internal alterations including installation of lift.

  Granted 10 docs

• 82 Margaret Street London W1W 8LH

  26/01972/ADLBC Submitted 25 Mar 2026 50 yards away

  89% historically approved · decision due ~10 Jun

  Detailed drawings of the new windows and roof lights including key junctions with existing or adjoining fabric and details of open ability, new doors, including key junctions with existing or adjoining fabric, railings, including key junctions with existing or adjoining fabric,detailed study of the 'laundry' with detailed drawings of proposals, including key junctions with existing or adjoining fabric and proposed openings, conservation strategy and restoration/conservation details for the chapel including method statements and reports, in consultation with the Victorian Society, floor build ups including key junctions with existing or adjoining fabric and threshold junctions, coordinated and accurately detailed services and distribution including key junctions with existing or adjoining fabric pursuant to condition 6 (1-7) of listed building dated 10th November 2025 (RN: 25/03052/LBC)

  Decided Loft or dormer Windows or glazing 79 docs

• 82 Margaret Street London W1W 8LH

  26/02220/ADFULL Submitted 2 Apr 2026 50 yards away

  89% historically approved · decision due ~2 Sep

  Details of facing materials / new windows and rooflights, external doors, railings, detailed study of the 'laundry' with detailed drawings of proposals and plant screens / plant noise assessment / pursuant to condition 30 19 of planning permission dated 10 November 2025 (RN: 25/02820/FULL).

  Decided Loft or dormer Windows or glazing 31 docs

• 82 Margaret Street London W1W 8LH

  26/05054/ADFULL Submitted 28 Jul 2026 50 yards away

  89% historically approved · decision due ~22 Sep

  Detailed planting scheme and an associated biodiversity management plan; pursuant to Condition 24 of planning permission dated 10th November 2025 (25/02820/FULL)

  Decided

• 82 Margaret Street London W1W 8LH

  26/04725/NMA Submitted 15 Jul 2026 50 yards away

  93% historically approved · decision due ~9 Sep

  Amendments to planning permission dated 10th November (RN 25/02820/FULL) for, 'Alterations including opening of laundry building within the central courtyard at ground floor level; excavation to lower sections of the existing lower ground floor accommodation; erection of an infill extension at lower ground floor level with courtyard above; erection of dummy mansard to the rear of All Saints House to screen new plant; all in connection with the use of part lower ground, part ground and part ground upper floors as 29 units for short to medium stay temporary visitor accommodation (sui generis); use of part lower ground, part ground and part first floor as an event space (Sui Generis); use of part ground floor as lounge/co-working space (Class E); and provision of plant ancillary to the building at basement level'; NAMELY, amendments to the wording of Condition 11, to broaden the function of the ground floor level space beyond its use by occupiers of the visitor accommodation in the building for working, socialising, entertaining, dining or as a co-working space, and to allow for the display or retail sale of goods, other than hot food as permitted by Class E(a).

  Awaiting decision Amendments Extension Loft or dormer
  Major scheme

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront with Medication Dispensing Outlet.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06294/FULL Awaiting decision

  15 Eaton Mews South London SW1W 9HP

  Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06317/FULL Awaiting decision

  124 Hamilton Terrace London NW8 9UT

  Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

  Received 15 Sep, published by the council 22 Sep 2026 Full applications
• 26/06273/FULL Awaiting decision

  9A Grosvenor Square London W1K 5AE

  Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

  Received 14 Sep, published by the council 22 Sep 2026 Full applications