12 Thornton Place London W1H 1WB

This site has had 2 applications since 2006: 1 approved, 0 refused.

• 07/01109/CLOPUD Granted

  12 Thornton Place London W1H 1WB

  Alterations to the rear elevation to include new sliding/folding doors and replacement of two windows with new doors with balconies.

  Decided 15 Feb 2007 Lawful development

1. 2 Nov 2006

   Received by Westminster

2. 22 Nov 2006

   Validated

   Checked as complete and ready for consideration.

3. 17 Jan 2007

   Decision issued: Application Withdrawn

4. 18 Sep 2026

   Added to PlanIndex

The applicant withdrew this application before Westminster decided it, and is free to submit a revised scheme at any time. 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.

• 12 Thornton Place London W1H 1WB

  07/01109/CLOPUD Submitted 2 Feb 2007 50 yards away

  Alterations to the rear elevation to include new sliding/folding doors and replacement of two windows with new doors with balconies.

  Granted Lawful development Windows or glazing 5 docs

• 11 Thornton Place London W1H 1FG

  26/01208/FULL Submitted 25 Feb 2026 50 yards away

  Installation of air conditioning condenser and associated acoustic enclosure to existing roof.

  Granted Full applications 16 docs

• 13 Salisbury Place London W1H 1FJ

  25/07187/ADFULL Submitted 6 Oct 2025 50 yards away

  Details of secure by design accreditation pursuant to Condition 10 of planning permission dated 27th March 2025 (RN: 23/08920/FULL).

  Granted Full applications 4 docs

• 56 Upper Montagu Street London W1H 1SN

  25/09343/LBC Submitted 24 Dec 2025 50 yards away

  90% historically approved · decision due ~18 Feb

  Use of ground floor and mezzanine levels to rear as residential (Class C3) use; deconversion of ground floor and mezzanine levels to rear together with two studio flats and one one-bedroom flat to form one three-bedroom maisonette; creation of reconfigured office unit in basement; replacement of all but one window with slimline timber double glazed units installation of secondary glazing to one window; renovation of shopfront; reinstatement of glazed fanlight with opening vent, new solid panel door, and awning; new glazed doors to south elevation of mezzanine garden room; new metal balustrading across rear boundary and raised terrace surface level with walk-on roof lights; replacement of concrete roof tiles with slate and new glazed roof light/ roof access; creation of green roof above mezzanine garden room; removal of modern partition walls and reinstatement of historical plan form as far as possible; reinstatement of historic period features all in connection with the use of building as office at part basement level with the remainder of the building being used as a single residential unit (Class C3) and associated internal alterations. (Linked to 25/09342/FULL)

  Awaiting decision Heritage and listed buildings New dwelling Loft or dormer +2 21 docs

• 56 Upper Montagu Street London W1H 1SN

  25/09342/FULL Submitted 24 Dec 2025 50 yards away

  87% historically approved · decision due ~18 Feb

  Use of ground floor and mezzanine levels to rear as residential (Class C3) use; deconversion of ground floor and mezzanine levels to rear together with two studio flats and one one-bedroom flat to form one three-bedroom maisonette; creation of reconfigured office unit in basement; replacement of all but one window with slimline timber double glazed units installation of secondary glazing to one window; renovation of shopfront; reinstatement of glazed fanlight with opening vent, new solid panel door, and awning; new glazed doors to south elevation of mezzanine garden room; new metal balustrading across rear boundary and raised terrace surface level with walk-on roof lights; replacement of concrete roof tiles with slate and new glazed roof light/ roof access; creation of green roof above mezzanine garden room; removal of modern partition walls and reinstatement of historical plan form as far as possible; reinstatement of historic period features all in connection with the use of building as office at part basement level with the remainder of the building being used as a single residential unit (Class C3) and associated internal alterations. (Linked to 25/09343/LBC)

  Awaiting decision Full applications New dwelling Loft or dormer +2 24 docs

• 45 York Street London W1H 1PW

  25/09312/LBC Submitted 23 Dec 2025 50 yards away

  Installation of cavity membrane system to the walls and soffit of the vault.

  Granted Heritage and listed buildings 12 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