Ground Floor 23 Wimpole Street London W1G 8GP

This site has had 3 applications since 2026.

• 26/03236/LBC Awaiting decision

  Ground Floor 23 Wimpole Street London W1G 8GP

  Internal alterations to lower ground floor flat.

  Submitted 15 May 2026 Heritage and listed buildings
• 26/00833/LBC Awaiting decision

  Ground Floor 23 Wimpole Street London W1G 8GP

  Replacement windows, doors and lantern roof and internal alterations (Linked to 26/00832/FULL)

  Submitted 11 Feb 2026 Heritage and listed buildings

1. 11 Feb 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 8 April 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 66 days over the applications it decided in the last year.

• 26/00833/LBC Awaiting decision

  Ground Floor 23 Wimpole Street London W1G 8GP

  Replacement windows, doors and lantern roof and internal alterations (Linked to 26/00832/FULL)

  Submitted 11 Feb 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/00833/LBC Awaiting decision

  Ground Floor 23 Wimpole Street London W1G 8GP

  Replacement windows, doors and lantern roof and internal alterations (Linked to 26/00832/FULL)

  Submitted 11 Feb 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 91 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.

• Ground Floor 23 Wimpole Street London W1G 8GP

  26/00833/LBC Submitted 11 Feb 2026 50 yards away

  90% historically approved · decision due ~8 Apr

  Replacement windows, doors and lantern roof and internal alterations (Linked to 26/00832/FULL)

  Awaiting decision Heritage and listed buildings Windows or glazing 15 docs

• 30B Wimpole Street London W1G 8YB

  26/03135/FULL Submitted 12 May 2026 50 yards away

  87% historically approved · decision due ~7 Jul

  Use of Basement, Ground, First and Second Floors for Medical Purposes (Use Class E (e)) for a temporary period of 20 years.

  Awaiting decision Full applications 13 docs

• Ground Floor 23 Wimpole Street London W1G 8GP

  26/03236/LBC Submitted 15 May 2026 50 yards away

  90% historically approved · decision due ~10 Jul

  Internal alterations to lower ground floor flat.

  Awaiting decision Heritage and listed buildings 10 docs

• 64 Wimpole Street London W1G 8YS

  26/01740/FULL Submitted 18 Mar 2026 50 yards away

  87% historically approved · decision due ~13 May

  Erection of a new roof terrace and green roof area at rear 2nd floor level; installation of plant and photovoltaic panels at main roof level and new mansard roof extension and installation of plant on the mews roof level; alterations at ground floor front elevation; Internal and external alterations throughout the building in connection with a rear elevation extension from first to fourth floor levels and the reconfiguration of the existing fifth floor level, installation of new double glazed windows throughout all in connection with a change of use to Class E (e) medical use.

  Awaiting decision Full applications Extension Loft or dormer +2 88 docs

• Flat 2 New Cavendish Mansions 48 New Cavendish Street London W1G 8TG

  26/00872/FULL Submitted 12 Feb 2026 50 yards away

  87% historically approved · decision due ~9 Apr

  Retrofit of existing windows, including insertion of slimline double-glazing windowpanes to front facade.

  Awaiting decision Full applications Windows or glazing 13 docs

• 45 New Cavendish Street London W1G 9TJ

  25/07902/LBC Submitted 31 Oct 2025 50 yards away

  Internal alterations at ground and lower ground level including reinstatement of staircase. (Linked with 25/07901/FULL)

  Granted Heritage and listed buildings 11 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