1 Sussex Street London SW1V 4RZ

This site has had 7 applications since 2026.

• 26/07386/ADFULL Awaiting decision

  1 Sussex Street London SW1V 4RZ

  Details of Window, including section drawings showing the glazing bars; Door, including section drawings showing the glazing bars; Awning; pursuant to condition 3 (a, b, and c) of planning permission dated 4th September 2026 (26/04925/FULL)

  Submitted 29 Oct 2026
• 26/07388/ADFULL Awaiting decision

  1 Sussex Street London SW1V 4RZ

  Detailed drawings of all new windows and external doors; pursuant to condition 4 of planning permission dated 23rd July 2026 (26/02493/FULL)

  Submitted 29 Oct 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
• 26/04925/FULL Decided

  1 Sussex Street London SW1V 4RZ

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

  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. 29 Oct 2026

   Received by Westminster

2. 3 Nov 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 24 December 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 91 days over the applications it decided in the last year.

• 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

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster's median decision took 91 days. More in our guide to how long planning decisions take.

The published feed does not state which type of application this is; the register entry on Westminster's portal will say. Our guide explains the common types.

• 1 Sussex Street London SW1V 4RZ

  26/04924/FULL Submitted 23 Jul 2026 50 yards away

  88% 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

  26/07386/ADFULL Submitted 29 Oct 2026 50 yards away

  89% historically approved · decision due ~24 Dec

  Details of Window, including section drawings showing the glazing bars; Door, including section drawings showing the glazing bars; Awning; pursuant to condition 3 (a, b, and c) of planning permission dated 4th September 2026 (26/04925/FULL)

  Awaiting decision Windows or glazing

• 1 Sussex Street London SW1V 4RZ

  26/04925/FULL Submitted 23 Jul 2026 50 yards away

  88% 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

• 1 Sussex Street London SW1V 4RZ

  26/07388/ADFULL Submitted 29 Oct 2026 50 yards away

  89% historically approved · decision due ~24 Dec

  Detailed drawings of all new windows and external doors; pursuant to condition 4 of planning permission dated 23rd July 2026 (26/02493/FULL)

  Awaiting decision Windows or glazing

• 1 Sussex Street London SW1V 4RZ

  26/02525/FULL Submitted 16 Apr 2026 50 yards away

  88% 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 50 yards away

  88% historically approved · decision due ~4 Nov

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

  Decided Full applications Windows or glazing