54 Chester Square London SW1W 9EA

26/01216/FULLRefused

Proposal

Removal of two existing air-conditioning units from front lightwell and roof level, installation of two new air-conditioning units at roof level within an acoustic enclosure, and removal and replacement of external CCTV cameras. Associated minor internal works using existing service routes.

Received: 2 April 2026
Decided: 3 July 2026
Council: City of Westminster

Site boundary (council red line)

ReceivedSubmitted2 Apr
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided3 Jul

Decided in 92 days

This is a planning application at 54 Chester Square London SW1W 9EA. Westminster has handled 26,489 applications of this type and approves 88% of them, typically deciding them in 54 days. This one was decided in 92 days, 5 weeks longer than Westminster's median. The site is in the Belgravia conservation area, with 8 listed buildings nearby. There have been 5 other applications at this address. We hold 1,432 applications in total for the SW1W postcode area.

Application Details

Reference

26/01216/FULL

Address

54 Chester Square London SW1W 9EA

Postcode

SW1W 9EA

Local Authority

Westminster

Decision Status

Rejected

Applicant & Agent

Planning Application Dates

Date Decided

3 July 2026

Date Submitted

2 April 2026

Planning Decision

Publicity

Appeal

Additional Information

Coordinates

51.494637, -0.149936

Enriching application data

2/3

Council recordsAppealsFlood risk

Source: Westminster

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

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Associated applications

2026
2 Apr
Removal of two existing air-conditioning units from front lightwell and roof level, installation of two new…
This applicationRefusedApplication26/01216/FULL
2026
2 Apr
Removal of two existing air-conditioning units from front lightwell and roof level, installation of two new…
RefusedListed building consentFiled alongside26/01217/LBC

Planning history at this site

4 other applications at this property, newest first.

Planning constraints

Designations that overlap or adjoin the site outline.

Conservation area: Belgravia
Listed building: Grade II: 46-63 Chester Square Including No. 39 Eccleston StreetOn or next to this site
Article 4 direction: Article 4 Basement Development Permitted Rights Removed
Flood zone 1: Low probability (rivers and sea)

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.

© 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 2026-10-09. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

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