21 - 22 Great Castle Street London W1G 0HY

1. 5 Jan 2026

   Received by Westminster

2. 26 Feb 2026

   Decision issued: Application Permitted

3. 20 Jul 2026

   Added to PlanIndex

Westminster granted permission on 26 February 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.

Advertisement consent is judged on two things only: amenity and public safety, not competition or other planning considerations. More in our guide to planning application types.

• Roxburghe House 273 - 287 Regent Street London W1B 2HA

  26/05748/FULL Submitted 21 Aug 2026 50 yards away

  87% historically approved · decision due ~16 Oct

  Refurbishment and extension of Roxburghe House and 39 and 40 Margaret Street, including new stair and lift core extension, UKPN substation and the introduction of a rooftop terrace, pavilion and plant enclosure to each building; replacement of windows, shopfronts and new office entrance from Margaret Street and associated ancillary works; and associated works with the use of the buildings as Class E(g) at part basement, part ground floor and upper floors and Class E(a)(b)(c) at part ground and part basement levels. (Linked with 26/05749/LBC)

  Awaiting decision Full applications Extension Windows or glazing

• Roxburghe House 273 - 287 Regent Street London W1B 2HA

  26/05749/LBC Submitted 21 Aug 2026 50 yards away

  90% historically approved · decision due ~16 Oct

  Refurbishment and extension of Roxburghe House and (unlisted) 39 and 40 Margaret Street, including new stair and lift core extension, UKPN substation and creation of localised openings in party walls to link the buildings; replacement of windows; internal and external improvements to upgrade the existing building fabric and introduction of core extension and plant enclosures at roof level of the buildings; facade cleaning; and associated ancillary works. At Roxburghe House: creation of rooftop terrace and pavilion; alterations to entrances; and lowering of some roof level windows. At Margaret Street (unlisted): replacement of ground floor slab, upward extension of the building and chimneys to provide an additional floor, plus creation of a roof terrace and pavilion at level 05; a new office entrance with glazed frontage, extension behind rear façade; and associated ancillary works. (Linked with 26/05748/FULL)

  Awaiting decision Heritage and listed buildings Extension Windows or glazing

• 37 Cavendish Square London W1G 0PP

  25/07190/FULL Submitted 6 Oct 2025 50 yards away

  Variation of condition 5 of planning permission dated 16th November 2023 (RN:23/06887/FULL) for, 'Use of the public highway for placing 1) two tables, four chairs and two barriers in an area measuring 4.3m x 1.3m; and 2) two tables and four chairs in an area measuring 3.9m x 1.0m. Namely, to allow the continued use of the two areas for a further extended period for 24 months until 31 October 2027 (Application under Section 73 of the Act).

  Granted Full applications 13 docs

• Walmar House 296 Regent Street London W1B 3AP

  26/00056/FULL Submitted 6 Jan 2026 50 yards away

  87% historically approved · decision due ~3 Mar

  Installation of new rotating entrance door and accessible door; removal of existing sliding entrance doors and internal lobby doors; installation of air curtain, new flooring, new lighting fixtures and new security gate. [Linked to 26/00057/LBC]

  Awaiting decision Full applications 22 docs

• 33 Margaret Street London W1G 0JD

  26/00479/LBC Submitted 27 Jan 2026 50 yards away

  90% historically approved · decision due ~24 Mar

  Cleaning of the elevations fronting onto Regent Street and Margaret Street using facade gommage.

  Awaiting decision Heritage and listed buildings 14 docs

• Walmar House 296 Regent Street London W1B 3AP

  26/00057/LBC Submitted 6 Jan 2026 50 yards away

  90% historically approved · decision due ~3 Mar

  Installation of new rotating entrance door and accessible door; removal of existing sliding entrance doors and internal lobby doors; installation of air curtain, new flooring, new lighting fixtures and new security gate. [Linked to 26/00056/FULL]

  Awaiting decision Heritage and listed buildings 22 docs

• 26/06444/ADV Awaiting decision

  107 Long Acre London WC2E 9NT

  Display of an internally illuminated (backlit letters only) projecting sign measuring 0.60m x 0.77m on the Neal Street elevation. [Split decision].

  21 Sep 2026 Advertising
• 26/06296/ADV Awaiting decision

  15 Warwick Way London SW1V 1QT

  Display of Individual soft halo externally illuminated individual brass letters on fascia. Display of externally illuminated hanging sign measuring 40mm x 40mm, including Gilded vinyl decal.

  Received 15 Sep, published by the council 17 Sep 2026 Advertising
• 26/06070/ADV Granted

  36 Shepherd Market London W1J 7QR

  Display of non-illuminated screen-printed signage to the fabric and valance of retractable canvas awning.

  Received 7 Sep, published by the council 11 Sep 2026 Advertising
• 26/06304/ADV Awaiting decision

  10 Piccadilly London W1J 0DD

  Display of an externally illuminated advertising area measuring 7.4m x 10.1m and a 1:1 printed image of the building for a temporary period of 15 months.

  Received 15 Sep, published by the council 22 Sep 2026 Advertising
• 26/05573/ADV Decided

  1 The Piazza Covent Garden London WC2E 8HB

  Display of two platforms measuring 13.6m x 3.6m x 2.263m and 14.61m x 3.6m x 2.263m each featuring three internally illuminated sculptures for a temporary period from 16 October 2026 to 6 January 2027.

  Received 17 Aug, published by the council 22 Aug 2026 Advertising