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Development Site At 18A Curzon Street And 4, 5 And 6 Stanhope Gate London W1K 1LQ

23/00071/FULLFull Planning Permission ApplicationApproved
Full

Approved on 6 October 2023

Council decision: Application PermittedDelegated (officer decision)

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

Erection of a glazed extension (for residential use) to the existing winter garden at the flat on roof level (level 7).

Received
6 January 2023
Decision level
Delegated (officer decision)
Public comments
2
Ward
West End
  1. Received6 Jan
  2. Validated13 Jan
  3. Consult.
  4. Target10 Mar
  5. Decided6 Oct

Decided in 266 days (council typically 49)

About this application

This is a full planning application for an extension at Development Site At 18A Curzon Street And 4, 5 And 6 Stanhope Gate London W1K 1LQ. Westminster has handled 4,484 applications of this type. This one was decided in 273 days, 32 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 20 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 484 applications across West End. We hold 886 applications in total for the W1K postcode area.

86% of full 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 1LQ
Application type
Full Planning Permission Application
Scale / size
Small

Planning application dates

Date validated
13 January 2023
Consultation expiry
15 February 2023
Target decision date
10 March 2023

Applicant and agent

Agent
DP9
Agent address
100 Pall Mall St. James's London SW1Y 5NQ

Planning decision

Statutory period
56 days

Publicity

Last advertised
25 January 2023
Advertisement expiry
15 February 2023
Site notice start
17 January 2023
Site notice end
7 February 2023

Additional information

Planning Portal ID
PP-11680037
Documents
66

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: 5, Stanhope Gate W1On this site · +1 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • Brownfield land register: 4 Stanhope Gate London W1J 7FYRegister 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.

© 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. 2023
    6 Jan

    Erection of a glazed extension (for residential use) to the existing winter garden at the flat on roof level…

    This applicationApprovedFull23/00071/FULL
  2. 2023
    6 Jan

    Erection of a glazed extension (for residential use) to the existing winter garden at the flat on roof level…

    ApprovedListed building consentFiled alongside23/00072/LBC

Source: Westminster

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

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