Basement And Ground Floor 39 Marylebone High Street London W1U 4QG

1. 7 Sep 2026

   Received by Westminster

2. 15 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 2 November 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 65 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 advertisement consent applications in a median of 52 days. More in our guide to how long planning decisions take.

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.

• 39 Marylebone High Street London W1U 4QQ

  22/04741/NMA Submitted 15 Jul 2022 50 yards away

  Amendments to planning permission 21st June 2022 (RN: 22/01190/FULL) Erection of a rear mansard style roof extension to enlarge dwelling (Class C3) and installation of new double-glazed windows on front and rear elevations of the building. NAMELY; installation of an additional conservation roof light and the use of lead at new flat roof level.

  Refused Amendments Extension Loft or dormer +1 11 docs
  Domestic

• 36 Marylebone High Street London W1U 4QD

  26/01102/ADV Submitted 23 Feb 2026 50 yards away

  Display of an internally illuminated (letters only) projecting sign measuring 0.25m x 0.5m.

  Granted Advertising 18 docs

• 16 Beaumont Mews London W1G 6EJ

  25/05859/FULL Submitted 19 Aug 2025 50 yards away

  87% historically approved · decision due ~14 Oct

  Variation of conditions 1 and 13 of planning permission 19 February 2025 (RN: 24/03039/FULL) for the: 'Excavation of single storey basement and the demolition and replacement of the mews building with an additional mansard storey to provide additional residential floorspace including the installation of an air source heat pump at roof level (Class C3)'. Namely, to allow openable side hung windows instead of fixed-shut to the rear (Application under S73 of the Act).

  Awaiting decision Full applications Loft or dormer Demolition +1 7 docs
  Small domestic

• 16 Beaumont Mews London W1G 6EJ

  25/07149/FULL Submitted 3 Oct 2025 50 yards away

  Variation of Conditions 1 of planning permission dated 19th February 2025 (RN: 24/03039/FULL) for, 'Excavation of single storey basement and the demolition and replacement of the mews building with an additional mansard storey to provide additional residential floorspace including the installation of an air source heat pump at roof level (Class C3)'; NAMELY, to allow the retention of the garage space together with associated amendments to the internal layout and external openings; omission of approved lightwell from the ground to basement level; alterations to fenestration to the front and rear elevations, and relocation of roof level plant. (Application under Section 73 of the Act).

  Granted Full applications Loft or dormer Demolition +1 27 docs
  Small domestic

• 16 Beaumont Mews London W1G 6EJ

  26/03548/FULL Submitted 29 May 2026 50 yards away

  87% historically approved · decision due ~24 Jul

  Variation of Condition 1 (approved plans) and Condition 2 (Code of Construction Practice) of planning permission 24/03039/FULL dated 19th February 2025 for the 'Excavation of single storey basement and demolition and replacement of the mews building with an additional mansard storey to provide additional residential floorspace including the installation of an air source heat pump at roof level (Class C3)'; namely to allow the development to be carried out in two phases and to secure the submission and approval of the Code of Construction Practice on a phase-specific basis. (Application under Section 73 of the Act).

  Awaiting decision Full applications Loft or dormer Demolition 10 docs
  Small domestic

• 16 Beaumont Mews London W1G 6EJ

  25/07157/NMA Submitted 3 Oct 2025 50 yards away

  Amendments to planning permission dated 19 February 2025 (RN:24/03039/FULL) for excavation of single storey basement and the demolition and replacement of the mews building with an additional mansard storey to provide additional residential floorspace including the installation of an air source heat pump at roof level (Class C3). namely, to allow the addition of a condition to the addtiona of a condition allwoing the development to be carried in two phase. for the approved development to be implemented in two phases, with the basement construction deferred to a later stage.

  Withdrawn Amendments Loft or dormer Demolition 7 docs
  Small domestic

• 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
• 26/05573/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
• 26/06184/ADV Awaiting decision

  Royal Horseguards Hotel 2 Whitehall Court London SW1A 2EL

  Display of two non-illuminated hotel-branded flags measuring 2m X 0.1m mounted on two angled wall-mounted flagpoles on the northern elevation. [Linked to 26/05884/LBC].

  Received 10 Sep, published by the council 17 Sep 2026 Advertising
• 26/06217/ADV Awaiting decision

  208 Regent Street London W1B 5BD

  Display of non illuminared fascia sign measuring 0.702m X 0.25m, 0.845m X 0.3m, externally illuminated hanging sign 0.65m X 0.65m, 0.1m X 1.8m, non illuminated other sign 0.2m X 0.29m, 0.4m X 0.2m, 0.4m X 0.2m

  Received 10 Sep, published by the council 18 Sep 2026 Advertising