1 Sussex Street London SW1V 4RZ

This site has had 4 applications since 2026.

• 26/04924/FULL Decided

  1 Sussex Street London SW1V 4RZ

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

  Submitted 23 Jul 2026 Full applications
• 26/02525/FULL Awaiting decision

  1 Sussex Street London SW1V 4RZ

  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.

  Submitted 16 Apr 2026 Full applications
• 26/02494/FULL Awaiting decision

  1 Sussex Street London SW1V 4RZ

  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.

  Submitted 15 Apr 2026 Full applications

1. 23 Jul 2026

   Received by Westminster

2. 1 Aug 2026

   Added to PlanIndex

3. 11 Sep 2026

   Status changed to Decided

   Previously Pending.

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. 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.

• 1 Sussex Street London SW1V 4RZ

  26/04924/FULL Submitted 23 Jul 2026 0m 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

  26/02525/FULL Submitted 16 Apr 2026 0m 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

• 31 Winchester Street London SW1V 4NZ

  26/05977/FULL Submitted 2 Sep 2026 35m away

  87% historically approved · decision due ~4 Nov

  Replacement of front and rear windows with double glazed timber framed sash and casement windows; replacement of a door with a double glazed timber framed door; and associated works.

  Awaiting decision Full applications Windows or glazing

• 4 Sussex Street London SW1V 4RS

  26/05978/FULL Submitted 2 Sep 2026 37m away

  87% historically approved · decision due ~4 Nov

  Replacement of existing single glazed timber framed sash windows to front and side elevations with double glazed timber framed sash windows. Replacement of existing single glazed timber framed sash and casement windows with double glazed timber framed sash and casement windows. Replacement of existing single glazed timber framed door with a double glazed timber framed door.

  Awaiting decision Full applications Windows or glazing

• 1 Sussex Street London SW1V 4RZ

  26/02494/FULL Submitted 15 Apr 2026 40m 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

• Basement Flat A 103 Alderney Street London SW1V 4HE

  26/01903/TCA Submitted 24 Mar 2026 42m 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

• 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