Skip to content
PlanIndex Get alerts
Menu

Planning application

1 Marylebone High Street London W1U 4DL

Awaiting decision Westminster 25/08905/FULL Full Planning Permission Application

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 25/08905/FULL

Application record

Reference
25/08905/FULL
Type
Full Planning Permission Application
Status
Pending
Received
8 Dec 2025
Validated
8 Dec 2025
Ward
Marylebone
Postcode
W1U 4DL

Site history

Applications at this address on the Westminster register

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
  • 25/06757/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
  • 25/05396/ADFULL Granted

    1 Marylebone High Street London W1U 4DL

    Details of shopfront, new windows, new glazed entrance door, refuse & recycling storage, all flood resilient and resistant measures, elevation and floor plans showing privacy measures to prevent occupants of the terrace overlooking the roof terrace, pre-demolition audit and secure cycle storage for the ground floor retail units (two spaces) pursuant to conditions 8, 11, 15, 17, 20 and 21 of planning permission dated 18th June 2025 (RN:24/08179).

    Decided 6 Oct 2025 Full applications

Timeline

Dates from the published record

  1. 8 Dec 2025

    Received by Westminster

  2. 20 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 2 February 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 91 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Howard de Walden Estates Limited Agent, a developer registered in London

Active · incorporated 1963 · London

37 applications on PlanIndex · 91% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

14 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

About full applications

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.

Nearby applications

Within 0.3 miles

  • 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

    25/05396/ADFULL Submitted 1 Aug 2025 50 yards away

    Details of shopfront, new windows, new glazed entrance door, refuse & recycling storage, all flood resilient and resistant measures, elevation and floor plans showing privacy measures to prevent occupants of the terrace overlooking the roof terrace, pre-demolition audit and secure cycle storage for the ground floor retail units (two spaces) pursuant to conditions 8, 11, 15, 17, 20 and 21 of planning permission dated 18th June 2025 (RN:24/08179).

    Granted Full applications Demolition Windows or glazing 24 docs

  • 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

    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

  • 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

  • Basement And Ground Floor 79 Marylebone Lane London W1U 2PX

    26/06774/ADV Submitted 5 Oct 2026 50 yards away

    82% historically approved · decision due ~30 Nov

    Display of a non-illuminated fascia sign measuring 0.70m x 1.99m.

    Decided Advertising

In Westminster

  • 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