1 Marylebone High Street London W1U 4DL

This site has had 5 applications since 2025: 2 approved, 0 refused.

• 26/05334/FULL Awaiting decision

  1 Marylebone High Street London W1U 4DL

  Removal of existing Luxcrete panelled pavement and replacement with York stone paving slabs outside 1 Marylebone High Street; and addition of textured porcelain tiles to office entrance step.

  Submitted 6 Aug 2026 Full applications
• 26/00431/NMA Awaiting decision

  1 Marylebone High Street London W1U 4DL

  Amendments to planning permission dated 18 June 2025 (RN: 24/08179/FULL) for the: Rear extension to existing building, formation of new roof terrace including rooftop pavilion, new external plant, replacement of existing windows with double glazing and minor alterations to building facade including new entrance. Namely, to allow the removal of existing entrance step with a ramp; removal of existing smoke vents and pavement lights with concrete to match existing; and changes in window arrangement on rear and north elevation of the building.

  Submitted 26 Jan 2026 Amendments
• 25/08905/FULL Awaiting decision

  1 Marylebone High Street London W1U 4DL

  Use of the 1st and 2nd floor maisonette from residential use (Class C3) to office use (Class E). This application forms part of a land use swap with 38 Portland Place (inc. 9 Cavendish Mews North) and Moxon House

  Submitted 8 Dec 2025 Full applications
• 25/06757/ADFULL Granted

  1 Marylebone High Street London W1U 4DL

  Detailed samples of the cladding for the rooftop pavilion pursuant to condition 4 of planning permission dated 18th June 2025 (RN: 24/08179).

  Decided 7 Oct 2025 Full applications

1. 1 Aug 2025

   Received by Westminster

2. 6 Oct 2025

   Decision issued: Application Permitted

3. 21 Jul 2026

   Added to PlanIndex

Westminster granted permission on 6 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.

• 1 Marylebone High Street London W1U 4DL

  25/06757/ADFULL Submitted 19 Sep 2025 50 yards away

  Detailed samples of the cladding for the rooftop pavilion pursuant to condition 4 of planning permission dated 18th June 2025 (RN: 24/08179).

  Granted Full applications 8 docs

• 1 Marylebone High Street London W1U 4DL

  26/05334/FULL Submitted 6 Aug 2026 50 yards away

  87% historically approved · decision due ~1 Oct

  Removal of existing Luxcrete panelled pavement and replacement with York stone paving slabs outside 1 Marylebone High Street; and addition of textured porcelain tiles to office entrance step.

  Awaiting decision Full applications

• 1 Marylebone High Street London W1U 4DL

  26/00431/NMA Submitted 26 Jan 2026 50 yards away

  93% historically approved · decision due ~25 May

  Amendments to planning permission dated 18 June 2025 (RN: 24/08179/FULL) for the: Rear extension to existing building, formation of new roof terrace including rooftop pavilion, new external plant, replacement of existing windows with double glazing and minor alterations to building facade including new entrance. Namely, to allow the removal of existing entrance step with a ramp; removal of existing smoke vents and pavement lights with concrete to match existing; and changes in window arrangement on rear and north elevation of the building.

  Awaiting decision Amendments Extension Roofing +1 18 docs

• 1 Marylebone High Street London W1U 4DL

  25/08905/FULL Submitted 8 Dec 2025 50 yards away

  87% historically approved · decision due ~2 Feb

  Use of the 1st and 2nd floor maisonette from residential use (Class C3) to office use (Class E). This application forms part of a land use swap with 38 Portland Place (inc. 9 Cavendish Mews North) and Moxon House

  Awaiting decision Full applications 14 docs

• 3 Marylebone High Street London W1U 4NG

  26/00410/ADV Submitted 23 Jan 2026 50 yards away

  Display of an internally illuminated (letters only) fascia sign measuring 2.61m x 0.235m.

  Granted Advertising 10 docs

• 120 Marylebone Lane London W1U 2QG

  05/06121/ADFULL Submitted 29 Jul 2005 50 yards away

  Details of bevelled glass pursuant to Condition 2 of planning permission dated 30 June 2005 (RN: 05/03306).

  Granted Full applications 2 docs

• 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