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41 Upper Grosvenor Street London W1K 2NH

25/07262/FULLFull Planning Permission ApplicationApproved
Full

Approved on 5 March 2026

Site boundary (council red line)

Proposal

External alterations including rooftop and rear extension; and reconfiguration and amalgamation of existing residential accommodation (comprising 2 x 2bed and 1 x 1 bed) to provide 3 homes (1 x 2 bed and 2 x 3 bed) (Class C3) at 41 Reeves Mews; external alterations including rooftop and rear extension and terrace, loft conversion and new dormers and enlargement of basement at 41 Reeves Mews; and change of use of existing commercial use (Use Class E) to residential (Use Class C3) at lower ground of 41 Reeves Mews to facilitate shared cycle storage, refuse and plant facilities to serve both 41 Upper Grosvenor Street and 41 Reeves Mews; and associated landscaping across the site. [SITE INCLUDES 41 REEVES MEWS]

Received
8 October 2025
Ward
West End
Agent
hgh Consulting
  1. Received8 Oct
  2. Validated22 Oct
  3. Consult.
  4. Target17 Dec
  5. Decided5 Mar

Decided in 134 days (council typically 49)

About this application

This is a full planning application for a loft conversion at 41 Upper Grosvenor Street London W1K 2NH. Westminster has handled 4,484 applications of this type. This one was decided in 148 days, 14 weeks longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 16 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 478 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 2NH
Application type
Full Planning Permission Application
Scale / size
Small

Planning application dates

Date validated
22 October 2025
Target decision date
17 December 2025

Applicant and agent

Agent
hgh Consulting
Agent address
30 Newman Street London W1T 1PT United Kingdom

Planning decision

Statutory period
56 days

Additional information

Planning Portal ID
PP-14297191
Comments
0
Documents
40

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Mayfair
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (22)

flood storage areas, listed buildings, 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 2026-11-03. 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.

Source: Westminster

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

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