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128 Piccadilly London W1J 7PY

26/04489/FULLFullApproved

Approved on 3 September 2026

Site boundary (council red line)

Proposal

Erection of a single storey extension at 4th floor level facilitating link between existing bedrooms and internal alterations to door openings and alterations to existing structure to incorporate extension. (Linked with 26/04490/LBC)

Received
6 July 2026
  1. Received6 Jul
  2. Validated10 Jul
  3. Consult.
  4. Target
  5. Decided3 Sep

Decided in 55 days (council typically 49)

About this application

This is a full planning application for an extension at 128 Piccadilly London W1J 7PY. Westminster has handled 4,484 applications of this type. This one was decided in 55 days, 6 days longer than Westminster's typical decision time. The site is in the Mayfair conservation area, with 9 listed buildings nearby. There have been 2 other applications at this address. In the past year there have been 478 applications across West End. We hold 940 applications in total for the W1J 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
W1J 7PY
Application type
Full
Scale / size
Small

Planning application dates

Date validated
10 July 2026

Applicant and agent

Architect profile
SPACELABUK LIMITED

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: Royal Air Force ClubOn this site · +2 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • 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 2026-11-03. 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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