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1 Sussex Street London SW1V 4RZ

26/04924/FULLApproved

Approved on 4 September 2026

Site boundary (council red line)

Proposal

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

Submitted
23 July 2026
  1. Received23 Jul
  2. Validated
  3. Consult.
  4. Target
  5. Decided4 Sep

Decided in 43 days

About this application

This is a planning application for an extension at 1 Sussex Street London SW1V 4RZ. Westminster has handled 27,078 applications of this type. This one was decided in 43 days, 6 days quicker than Westminster's typical decision time. The site is in the Pimlico conservation area, with 6 listed buildings nearby. There have been 4 other applications at this address. We hold 1,119 applications in total for the SW1V postcode area.

Application details

Postcode
SW1V 4RZ

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Flood zone 3: High probability (rivers and sea)
  • Conservation area: Pimlico
  • Listed building: Grade II: 108-138, Cambridge Street Sw1On or next to this site
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • Tree Preservation Order: Ref W43Protected tree on or next to this site
Also checked, none recorded (20)

flood storage areas, green belt, scheduled monuments, World Heritage Sites, World Heritage Site buffer zones, registered parks and gardens, registered battlefields, Heritage at Risk entries, nutrient neutrality catchments, national parks, National Landscapes, SSSIs, Special Areas of Conservation, Special Protection Areas, Ramsar sites, ancient woodland, national nature reserves, local nature reserves, heritage coasts and brownfield registers.

A guide only, from official open data; it is not a planning search. Flood zones cover rivers and sea, not surface water.

Data © Crown copyright and others · sources and licences

Contains public sector information from planning.data.gov.uk (MHCLG and local planning authorities), licensed under the Open Government Licence v3.0. © Crown copyright and database right 2026.

© Historic England 2026. Contains Ordnance Survey data © Crown copyright and database right 2026. The Historic England GIS Data contained in this material was obtained on 2026-11-03. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

© Natural England copyright. Contains Ordnance Survey data © Crown copyright and database right 2026.

© Environment Agency copyright and/or database right 2026. All rights reserved. Flood Map for Planning, Open Government Licence v3.0.

Contains Ordnance Survey data © Crown copyright and database right 2026.

Source: Office for National Statistics licensed under the Open Government Licence v.3.0. Contains OS data © Crown copyright and database right 2026.

Associated applications

  1. 2026
    23 Jul

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

    This applicationApprovedApplication26/04924/FULL
  2. 2026
    23 Jul

    Erection of a side infill at raised ground floor level and terrace over at first floor level, with…

    ApprovedApplicationFiled alongside26/04925/FULL

Source: Westminster

Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.

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