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Planning application

1 Sussex Street London SW1V 4RZ

Decided Westminster 26/04925/FULL Full applications

Works: Extension Windows or glazing

Decided. The decision notice on the council portal carries the outcome in full, including any conditions.

Proposal

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

As published by the council, reference 26/04925/FULL

Application record

Reference
26/04925/FULL
Category
Full applications
Status
Decided
Received
23 Jul 2026
Validated
23 Jul 2026
Postcode
SW1V 4RZ

Site history

Applications at this address on the Westminster register

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
  • 26/07387/ADFULL Awaiting decision

    1 Sussex Street London SW1V 4RZ

    Samples of the facing materials, including detailed drawings of the dormers, and windows including section drawings showing the glazing bars; pursuant to condition 3 and 4 of planning permission dated 4th September 2026 (26/04924/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
  • 26/02525/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

Timeline

Dates from the published record

  1. 23 Jul 2026

    Received by Westminster

  2. 1 Aug 2026

    Added to PlanIndex

  3. 11 Sep 2026

    Status changed to Decided

    Previously Pending.

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 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

After the decision

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.

About full applications

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.

Nearby applications

Within 0.3 miles

  • 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

    26/07387/ADFULL Submitted 29 Oct 2026 50 yards away

    89% historically approved · decision due ~24 Dec

    Samples of the facing materials, including detailed drawings of the dormers, and windows including section drawings showing the glazing bars; pursuant to condition 3 and 4 of planning permission dated 4th September 2026 (26/04924/FULL)

    Awaiting decision Loft or dormer 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

In Westminster

  • 26/06234/FULL Decided

    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
  • 26/07403/FULL Awaiting decision

    Basement Floor And Ground Floor Queen Annes House 34 Queen Anne's Gate London SW1H 9AB

    Refurbishment and enhancement of the building to facilitate its continued use as offices with ancillary residential accommodation, together with associated conservation, restoration, accessibility improvements, building services upgrades, landscaping and ancillary works. Internal and external alterations associated with the repair. (Linked with 26/07404/LBC)

    Received 30 Oct, published by the council 3 Nov 2026 Full applications
  • 26/07415/FULL Awaiting decision

    39 Montagu Square London W1H 2LL

    Amalgamation of Flats 3 and 4 (Use Class C3) to form one single dwelling (Use Class C3) including associated internal reconfiguration and refurbishments, alterations to access arrangements and improvements to the existing terrace and private amenity spaces and other associated works. (Linked with 26/07416/LBC)

    Received 30 Oct, published by the council 3 Nov 2026 Full applications
  • 26/06015/FULL Decided

    129 Saltram Crescent London W9 3JT

    Erection of a two-storey rear extension.

    Received 3 Sep, published by the council 11 Sep 2026 Full applications
  • 26/07382/FULL Awaiting decision

    90 Gloucester Place London W1U 6HS

    Use of the building as an embassy (sui generis)

    Received 28 Oct, published by the council 2 Nov 2026 Full applications