23 Grafton Street London W1S 4EY
Proposal
Phased development including retention of rear basement roof slab (previously proposed for demolition and replacement), infilling of void creating an internal lightwell and the 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.
- Received
- 30 January 2026
- Council
- City of Westminster
- ReceivedSubmitted30 Jan
- ValidatedValidated30 Jan
- Consult.Consultation
- TargetTarget Date
- DecidedDecided
This is a planning application for demolition at 23 Grafton Street London W1S 4EY. Westminster has handled 26,489 applications of this type and approves 88% of them, typically deciding them in 54 days. It was submitted on 30 January 2026 and is still awaiting a decision. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There have been 5 other applications at this address. We hold 773 applications in total for the W1S postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
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
- 202630 Jan
Phased development including retention of rear basement roof slab (previously proposed for demolition and…
This applicationPendingListed building consent26/00554/LBC - 202630 Jan
Amendments to planning permission dated 17 June 2025 (RN: 25/01604/FULL
ApprovedNon-material amendmentFiled alongside26/00555/NMA
Planning history at this site
10 other applications at this property, newest first.
- 202610 Sep
Details of all new windows and doors; pursuant to condition 10(B) of planning permission dated 17th June 2026…
ApprovedApplication26/06193/ADFULL - 202613 Mar
Detailed drawings of All new windows and doors pursuant to part conditions 4b of listed building consent…
PendingListed building consent26/01669/ADLBC - 202613 Mar
Detailed drawings of the alterations to party walls and buttress pursuant to part conditions 10a of planning…
ApprovedDischarge of conditions26/01670/ADFULL - 202618 Feb
23 Grafton Street - Rooflight Details
ApprovedDischarge of conditions26/01033/ADFULL - 202617 Feb
23 Grafton Street - Condition 4(B) Rooflight Details
ApprovedDischarge of conditions26/01025/ADLBC - 202610 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 - 202515 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 - 202510 Mar
Phased development including replacement of rear basement roof slab and creation of a rear extension at…
ApprovedListed building consent25/01605/LBC - 202510 Mar
Phased development including replacement of rear basement roof slab and creation of a rear extension at…
ApprovedListed building consent25/01604/FULL - 20259 Jan
Confirmation of the lawful implementation of planning permission dated 26 April 2021 (Ref: 19/05567/FULL
ApprovedLawful development: Existing use25/00117/CLEUD
Planning constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Mayfair
- 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.
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 2026-10-09. 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.
Before the decision
You may need a heritage statement. Heritage & archaeology consultants near this site
A listed building is on or next to this site.
- 0.3 miLondonRTPI
- 0.4 miLondonRTPIRICS Regulated
- 0.8 miLondonRTPI
Nearest first, within 25 miles of the site. Every firm is listed free.
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