23, Grafton Street, W1S 4EY

25/01604/FULLFull planning & listed building consentPermitted

Full

Proposal

Phased development including replacement of rear basement roof slab and creation of a rear extension at ground floor. Removal of rear ground floor toilet block and external fire escape stairs. Demolition of existing, altered mansard roof and construction of a new mansard roof with dormer windows and concealed plant enclosure. Extension of existing lift to serve fourth floor. Replacement of third floor rear windows with double glazed sash windows. Minor internal reconfigurations. Continued use of ground floor as retail (Use Class E(a)) and basement, first, second, third and fourth as office (Use Class E(g)).

Received: 10 March 2025
Decided: 17 June 2025
Council: City of Westminster

Approximate site (title boundary)

Boundary © HM Land Registry, © Ordnance Survey · details

This information is subject to Crown copyright and database rights 2026 and is reproduced with the permission of HM Land Registry. The polygons (including the associated geometry, namely x, y co-ordinates) are subject to Crown copyright and database rights 2026 Ordnance Survey AC0000851063. Conditions of use.

ReceivedSubmitted10 Mar
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided17 Jun

Decided in 99 days (council typically 49)

7 weeks typical decision time in Westminster88% of full planning & listed building consent applications approved

This is a planning application for demolition at 23, Grafton Street, W1S 4EY. Westminster has handled 661 applications of this type and approves 88% of them, typically deciding them in 56 days. This one was decided in 99 days, 6 weeks longer than Westminster's median. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There have been 3 other applications at this address. In the past year there have been 369 applications across WEW_22. We hold 773 applications in total for the W1S postcode area.

Application Details

Reference

25/01604/FULL

Address

23, Grafton Street, W1S 4EY

Postcode

W1S 4EY

Local Authority

Westminster

Application Type

Full planning & listed building consent

Decision Status

Permitted

Applicant & Agent

Planning Application Dates

Date Decided

17 June 2025

Date Submitted

10 March 2025

Planning Decision

Publicity

Appeal

Additional Information

Coordinates

51.509540, -0.143085

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
10 Sep
Details of all new windows and doors; pursuant to condition 10(B) of planning permission dated 17th June 2026…
ApprovedApplicationRelated26/06193/ADFULL
2026
13 Mar
Detailed drawings of the alterations to party walls and buttress pursuant to part conditions 10a of planning…
ApprovedDischarge of conditions26/01670/ADFULL
2026
10 Feb
Variation of Conditions 7 and 8 of planning permission dated 17 June 2025 (RN: 25/01604/FULL
ApprovedVariation of conditions (s73)26/00782/FULL
2026
30 Jan
Amendments to planning permission dated 17 June 2025 (RN: 25/01604/FULL
ApprovedNon-material amendmentAmendment26/00555/NMA
2025
15 Dec
Details of waste storage pursuant to condition 11 of planning permission dated 17 June 2025 (RN: 25/01604/FULL
ApprovedDischarge of conditions25/09056/ADFULL
2025
10 Mar
Phased development including replacement of rear basement roof slab and creation of a rear extension at…
This applicationApprovedListed building consent25/01604/FULL
2025
10 Mar
Phased development including replacement of rear basement roof slab and creation of a rear extension at…
ApprovedListed building consentFiled alongside25/01605/LBC

Planning history at this site

5 other applications at this property, newest first.

Planning constraints

Designations that overlap or adjoin the site outline.

Conservation area: Mayfair
Listed building: Grade II: 21-23, Grafton Street W1On this site
Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
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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