128, Mount Street, W1K 3NU

25/02922/ADLBCApproval of details reserved by a condition (discharge)Approved

Discharge / amendments

Approved on 16 May 2025

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.

Proposal

Details of staircase and provision of a jib door on the original party wall with treatment to match the rooms on either side pursuant to Condition 4E and 6B of Listed Building Consent dated 07 January 2025 (RN 24/06687/LBC)

Submitted: 28 April 2025
Council: City of Westminster

ReceivedSubmitted28 Apr
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided16 May

Decided in 18 days (council typically 49)

About this application

This is a planning application at 128, Mount Street, W1K 3NU. Westminster has handled 1,733 applications of this type. This one was decided in 18 days, 4 weeks quicker than Westminster's typical decision time. The site is in the Mayfair conservation area, with 13 listed buildings nearby. There have been 6 other applications at this address. In the past year there have been 469 applications across WEW_22. We hold 886 applications in total for the W1K postcode area.

89% of approval of details reserved by a condition (discharge) applications at City of Westminster were approved. Across all application types, the council typically decides in about 7 weeks (median).

Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street

Application details

Postcode: W1K 3NU
Application type: Approval of details reserved by a condition (discharge)

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Mayfair
Listed building: Grade II: 125-9, Mount Street W1On this site · +2 more
Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
Brownfield land register: 21 - 23 Farm Street London W1J 5RGRegister site at or near this address
Flood zone 1: Low probability (rivers and sea)

Also checked, none recorded (20)

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 and heritage coasts.

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.

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

2025
2 May
Registering new address details for unit , St. Anslem Development Co Ltd, 128 Mount Street, London, W1K 3NU…
ApprovedAll OtherFiled alongsideSNN25/00030
2025
28 Apr
Details of staircase and provision of a jib door on the original party wall with treatment to match the rooms…
This applicationApprovedListed building consent25/02922/ADLBC
2025
22 Apr
Detailed drawings at 1:5 and 1:20 of the secondary glazing, all new internal wall insulation, showing…
ApprovedDischarge of conditionsFiled alongside25/02765/ADLBC

Planning history at this site

8 other applications at this property, newest first.

Source: Westminster

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

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