31 Winchester Street London SW1V 4NZ

1. 2 Sep 2026

   Received by Westminster

2. 9 Sep 2026

   Validated

   Checked as complete and ready for consideration.

3. 15 Sep 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 4 November 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.

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.

• 1 Sussex Street London SW1V 4RZ

  26/02525/FULL Submitted 16 Apr 2026 34m away

  87% historically approved · decision due ~11 Jun

  Variation of condition 1 of planning permission dated 3rd June 2024 (RN:24/01644/FULL) for the Erection of mansard roof extension including new conservation rooflight; raising existing parapet at rear elevation, associated works. Namely, side window being moved to not clash with new stairs as much, and replaced with larger window to match existing adjacent window (cill dropped) and to be clear slimlite glazed painted timber framed sash window with integral glazing bars, white internal spacers and no trickle vents.

  Awaiting decision Full applications Extension Loft or dormer +1 19 docs

• 1 Sussex Street London SW1V 4RZ

  26/04924/FULL Submitted 23 Jul 2026 35m away

  87% historically approved · decision due ~17 Sep

  Erection of mansard extension and new side window at second floor level.

  Decided Full applications Extension Loft or dormer +1

• 1 Sussex Street London SW1V 4RZ

  26/04925/FULL Submitted 23 Jul 2026 35m away

  87% historically approved · decision due ~17 Sep

  Erection of a side infill at raised ground floor level and terrace over at first floor level, with replacement window to single door.

  Decided Full applications Extension Windows or glazing

• Basement Flat A 103 Alderney Street London SW1V 4HE

  26/01903/TCA Submitted 24 Mar 2026 51m away

  1 x bay tree (rear): reduce height by 2m to 3m; to no more than previous reduction points; retaining shortened growth for furnishing. Reduce sides to match (by approximately 1m to 1.5m). Thin crown by 20%. 1 x Cotoneaster (rear): reduce low lateral branch over neighbours garden back to the upwards growing lateral branch about 1m from the main trunk union, reduce remaining crown by 2-3m all round to shape and balance ensuring retention of fine branch structure across the entire canopy area for crown continuity.

  Granted Trees 7 docs

• 1 Sussex Street London SW1V 4RZ

  26/02494/FULL Submitted 15 Apr 2026 60m away

  87% historically approved · decision due ~3 Jul

  Erection of a single-storey side infill extension over the existing side balcony at ground floor level and roof light to flat roof in front lightwell.

  Awaiting decision Full applications Extension Loft or dormer 24 docs
  Small domestic

• Ground Floor Flat 118 Cambridge Street London SW1V 4QF

  26/05847/ADFULL Submitted 25 Aug 2026 69m away

  89% historically approved · decision due ~20 Oct

  Detailed drawings at a scale of no less than 1:10 (with larger scale details where necessary) of the proposed floor build-up and detailed drawings at an appropriate scale of the proposed new opening and double doors within the front room wall pursuant to condition 5 and 6 of listed building dated 9th June 2026 (RN:26/01633/LBC)

  Awaiting decision

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  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 repolacement window and installation of double opening door.

  Received 15 Sep, published by the council 17 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))

  Received 11 Sep, published by the council 18 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)

  Received 11 Sep, published by the council 18 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)

  Received 1 Jun, published by the council 11 Sep 2026 Full applications