Planning application
1 Sussex Street London SW1V 4RZ
Works: Extension Loft or dormer Small domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
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.
As published by the council, reference 26/02494/FULL
Application record
- Reference
- 26/02494/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 15 Apr 2026
- Validated
- 8 May 2026
- Ward
- Pimlico North
- Postcode
- SW1V 4RZ
Site history
Applications at this address on the Westminster register
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.
-
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.
-
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.
Timeline
Dates from the published record
-
15 Apr 2026
Received by Westminster
-
8 May 2026
Validated
Checked as complete and ready for consideration.
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 3 July 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.
Who's behind it
Company information only, from the register and Companies House
Peek Architecture Ltd Agent, an architecture practice
70 applications on PlanIndex · across 6 councils · 76% 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 recordDocuments
Plans, drawings, consultee responses and the officer's report
24 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.
Trade members open them from here.
Open the documentsWhat 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 89 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 500 metres
-
Basement Flat A 103 Alderney Street London SW1V 4HE
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 -
110 Cambridge Street London SW1V 4QF
1 x whitebeam: remove four small branches as identified in the submitted photo.
Granted Trees 8 docs -
2 Sussex Street London SW1V 4RU
87% historically approved · decision due ~10 Jun
Infill extension to front/side lightwell at lower ground floor level, excavation beneath four existing vaults, creation of new windows and door and installation of new stairs to front basement lightwell
Awaiting decision Full applications Extension Windows or glazing 20 docs -
106G Cambridge Street London SW1V 4QG
Installation of replacement double glazed windows at fourth floor level.
Granted Full applications Windows or glazing 19 docs -
1 Sussex Street London SW1V 4RZ
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
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
Other full applications
In Westminster
-
26/06295/FULL Awaiting decision
15 Warwick Way London SW1V 1QT
Installation of a new shopfront.
-
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.
-
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))
-
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)
-
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)