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3 West Halkin Street London SW1X 8JJ

26/04465/LBCHeritageApproved
Listed building consent

Approved on 21 August 2026

Council decision: Application Permitted

Site boundary (council red line)

Proposal

Alterations to roof to provide a sunken plant room on the fifth floor attic space.

Received
6 July 2026
  1. Received6 Jul
  2. Validated6 Jul
  3. Consult.
  4. Target
  5. Decided21 Aug

Decided in 46 days (council typically 49)

About this application

This is a heritage application at 3 West Halkin Street London SW1X 8JJ. Westminster has handled 2,677 applications of this type. This one was decided in 46 days, 3 days quicker than Westminster's typical decision time. The site is in the Belgravia conservation area, with 20 listed buildings nearby. There have been 8 other applications at this address. In the past year there have been 380 applications across Knightsbridge & Belgravia. We hold 1,288 applications in total for the SW1X postcode area.

93% of heritage applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode
SW1X 8JJ
Application type
Heritage
Scale / size
Small

Planning application dates

Date validated
6 July 2026
Consultation expiry
5 August 2026

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Also checked, none recorded (21)

flood storage areas, tree preservation orders, 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
    6 Jul

    Alterations to roof to provide a sunken plant room on the fifth floor attic space.

    ApprovedFullFiled alongside26/04464/FULL
  2. 2026
    6 Jul

    Alterations to roof to provide a sunken plant room on the fifth floor attic space.

    This applicationApprovedListed building consent26/04465/LBC

Planning history at this site

8 other applications at this property, newest first.

  1. 2026
    2 Feb

    Internal and external alterations including reconfiguration of partitions/retention of existing partitions…

    ApprovedListed building consent26/00557/LBC
  2. 2026
    2 Feb

    Variation of condition 1 of planning permission dated 16 March 2021 (20/07145/FULL

    ApprovedVariation of conditions (s73)26/00571/FULL
  3. 2025
    28 Feb

    Use of the site as seven residential flats; internal and external alterations including partial demolition of…

    WithdrawnListed building consent25/01362/LBC
  4. 2025
    28 Feb

    Use of the site as seven residential flats; internal and external alterations including concealed plant at…

    WithdrawnFull Planning Permission Application25/01361/FULL
  5. 2023
    17 Oct

    Details of new external doors (first floor only) pursuant to Condition 12.1 (part) of planning permission…

    ApprovedDischarge of conditions23/07219/ADFULL
  6. 2023
    17 Oct

    Details of new external doors (first floor only) pursuant to Condition 4.10 (part) of listed building consent…

    ApprovedListed building consent23/07218/ADLBC

Source: Westminster

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

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