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1 Parliament Street London SW1A 2NE

26/06875/FULLAwaiting decision
Site boundary (council red line)

Proposal

Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures within the Colonnade arches, relocation of the frontage to the Colonnade line, associated internal alterations, stone repair and cleaning works, and associated ancillary works. (Linked with 26/06876/LBC)

Submitted
8 October 2026
  1. Received8 Oct
  2. Validated
  3. Consult.
  4. Target
  5. Decided

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About this application

This is a planning application at 1 Parliament Street London SW1A 2NE. Westminster has handled 27,078 applications of this type. It has been with the council since 8 October 2026 and is still awaiting a decision. The site is in the Whitehall conservation area, with 19 listed buildings nearby. There have been 3 other applications at this address. We hold 1,261 applications in total for the SW1A postcode area.

Application details

Postcode
SW1A 2NE

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: Whitehall
  • Listed building: Grade II: 37, Parliament Street Sw1On this site · +6 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.

Associated applications

  1. 2026
    8 Oct

    Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures…

    This applicationPendingApplication26/06875/FULL
  2. 2026
    8 Oct

    Alterations to the existing Colonnade at 1 Parliament Street, including installation of infill structures…

    PendingListed building consentPart of26/06876/LBC

Source: Westminster

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

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Before the decision

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The site is in flood zone 3 (Environment Agency).

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