1 Marylebone High Street London W1U 4DL

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

• 26/05334/FULL Decided

  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

  88% 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.

  Decided 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

  88% 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

• 26/07528/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