4 Marylebone Mews London W1G 8PY

This site has had 2 applications since 2026.

• 26/04440/LBC Awaiting decision

  4 Marylebone Mews London W1G 8PY

  Internal refurbishment including replacement of glazing to windows, clerestory, rooflights, entrance door and sidelights and minor external alterations. [Linked to 26/04439/FULL]

  Submitted 3 Jul 2026 Heritage and listed buildings

1. 3 Jul 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 28 August 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.

• 26/04440/LBC Awaiting decision

  4 Marylebone Mews London W1G 8PY

  Internal refurbishment including replacement of glazing to windows, clerestory, rooflights, entrance door and sidelights and minor external alterations. [Linked to 26/04439/FULL]

  Submitted 3 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/04440/LBC Awaiting decision

  4 Marylebone Mews London W1G 8PY

  Internal refurbishment including replacement of glazing to windows, clerestory, rooflights, entrance door and sidelights and minor external alterations. [Linked to 26/04439/FULL]

  Submitted 3 Jul 2026 Heritage and listed buildings

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 89 days. More in our guide to how long planning decisions take.

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.

• 4 Marylebone Mews London W1G 8PY

  26/04440/LBC Submitted 3 Jul 2026 0m away

  90% historically approved · decision due ~28 Aug

  Internal refurbishment including replacement of glazing to windows, clerestory, rooflights, entrance door and sidelights and minor external alterations. [Linked to 26/04439/FULL]

  Awaiting decision Heritage and listed buildings Loft or dormer Windows or glazing

• 2 Marylebone Mews London W1G 8PU

  12/10824/ADFULL Submitted 30 Oct 2012 16m away

  Approval of details pursuant to Conditions 5 and 6 of planning permission dated 3 November 2011; namely for a sample of obscure glazing, detailed drawings of glass screen for windows and second floor terrace and detailed drawings of new windows and doors

  Granted Full applications Windows or glazing 5 docs

• Hahnemann House 32 Welbeck Street London W1G 8EU

  26/03230/LBC Submitted 15 May 2026 18m away

  90% historically approved · decision due ~10 Jul

  Alteration and improvement of existing heating and cooling to the Chapel through reinstatement of a working fan to dome, installation of fan coil units and an associated air source heat pump, removal of existing wall heating panels, and opening of fixed windows. (Linked to 26/03229/FULL)

  Awaiting decision Heritage and listed buildings Windows or glazing 12 docs

• Hahnemann House 32 Welbeck Street London W1G 8EU

  26/03229/FULL Submitted 15 May 2026 18m away

  87% historically approved · decision due ~10 Jul

  Alteration and improvement of existing heating and cooling to the Chapel through reinstatement of a working fan to dome, installation of fan coil units and an associated air source heat pump, removal of existing wall heating panels, and opening of fixed windows. (Linked to 26/03230/LBC)

  Awaiting decision Full applications Windows or glazing 12 docs

• Hahnemann House 32 Welbeck Street London W1G 8EU

  25/06097/FULL Submitted 27 Aug 2025 21m away

  87% historically approved · decision due ~22 Oct

  Installation of CCTV to front entrance and rear emergency exit. (Retrospective) Linked with 25/06098/LBC

  Awaiting decision Full applications 15 docs

• Hahnemann House 32 Welbeck Street London W1G 8EU

  25/06098/LBC Submitted 27 Aug 2025 21m away

  90% historically approved · decision due ~22 Oct

  Installation of CCTV to front entrance and rear emergency exit. (Retropsective) Linked with 25/06097/FULL

  Awaiting decision Heritage and listed buildings 11 docs

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  15 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.

  15 Sep 2026 Full applications
• 26/06234/FULL Awaiting decision

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  11 Sep 2026 Full applications
• 26/06249/FULL Awaiting decision

  53 Wimpole Street London W1G 8YH

  Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

  11 Sep 2026 Full applications
• 26/03576/FULL Decided

  15A Devonshire Terrace London W2 3DW

  Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

  1 Jun 2026 Full applications