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Planning application

1 Sussex Street London SW1V 4RZ

Awaiting decision Westminster 26/02525/FULL Full Planning Permission Application

Works: Extension Loft or dormer Windows or glazing

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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.

As published by the council, reference 26/02525/FULL

Application record

Reference
26/02525/FULL
Type
Full Planning Permission Application
Status
Pending
Received
16 Apr 2026
Validated
16 Apr 2026
Ward
Pimlico North
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
  • 26/04925/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
  • 26/02494/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. 16 Apr 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 11 June 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.

Who's behind it

Company information only, from the register and Companies House

Peek Architecture Ltd Agent, an architecture practice

78 applications on PlanIndex · across 6 councils · 72% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

19 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

Watch members (£5 a month) open the document list from here.

Open the documents

What happens while it is decided

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 119 days. More in our guide to how long planning decisions take.

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

    26/04925/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

  • 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