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Sanctuary Buildings 20 Great Smith Street London SW1P 3BT

25/06581/LBCApproved

Approved on 19 February 2026

Site boundary (council red line)

Proposal

Installation of external pipework between the first and second floors on the south elevation.

Submitted
15 October 2025
  1. Received15 Oct
  2. Validated
  3. Consult.
  4. Target
  5. Decided19 Feb

Decided in 127 days

About this application

This is a planning application at Sanctuary Buildings 20 Great Smith Street London SW1P 3BT. Westminster has handled 27,078 applications of this type. This one was decided in 127 days, 11 weeks longer than Westminster's typical decision time. The site is in the Westminster Abbey and Parliament Square conservation area, with 9 listed buildings nearby. There have been 9 other applications at this address. We hold 1,247 applications in total for the SW1P postcode area.

Application details

Postcode
SW1P 3BT

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: Westminster Abbey And Parliament Square
  • Listed building: Grade II: Orchard HouseOn this site · +2 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
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.

Planning history at this site

9 other applications at this property, newest first.

  1. 2026
    30 Oct

    Installation of Automatic Opening Vents as part of essential fire strategy

    PendingFull planning permission26/07412/FULL
  2. 2026
    27 Apr

    Installation of automatic opening vents to window openings at levels 00, 01, 02 and 03 on east and west…

    ApprovedFull Planning Permission Application26/02778/FULL
  3. 2026
    13 Mar

    Detailed proof that all the necessary licenses under the Highways Act have been secured/approved for the…

    ApprovedDischarge of conditions26/01716/ADFULL
  4. 2025
    15 Dec

    Replacement of defective lintels above three windows on the sixth floor.

    ApprovedListed building consent25/09049/LBC
  5. 2025
    6 Oct

    Temporary modification and subsequent reinstatement of a single section of curtain walling spanning between…

    ApprovedApplication25/07203/FULL
  6. 2025
    20 Aug

    Replacement of raised modern floors at a higher level and installation of internal fall protection at first…

    ApprovedListed building consent25/05903/LBC

Source: Westminster

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

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