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Academy House 26 - 28 Sackville Street London W1S 3EJ

26/03991/NMANon-material amendmentsApproved
Discharge / amendments

Approved on 2 July 2026

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

Amendments to planning permission dated 28 January 2020 (RN: 19/07298/FULL) for, 'Use of part of the basement, ground floor and first floors to provide a retail unit (Class A1). Internal alterations to the office (Class B1) reception and provision of refuse stores at ground floor. External alterations to form new entrance doors and associated changes to shopfronts, new gate to the access ramp, plant and terrace at first floor and associated works'; NAMELY to amend windows, doors and vent positions, and adjustments to roof terrace layout.

Received
17 June 2026
Ward
West End
  1. Received17 Jun
  2. Validated17 Jun
  3. Consult.
  4. Target15 Jul
  5. Decided2 Jul

Decided in 15 days (council typically 49)

About this application

This is an application to amend a permission at Academy House 26 - 28 Sackville Street London W1S 3EJ. Westminster has handled 604 applications of this type. This one was decided in 15 days, 5 weeks quicker than Westminster's typical decision time. The site is in the Mayfair conservation area, with 15 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 484 applications across West End. We hold 791 applications in total for the W1S postcode area.

88% of amendment 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
W1S 3EJ
Application type
Non-material amendments
Scale / size
Small

Planning application dates

Date validated
17 June 2026
Target decision date
15 July 2026

Applicant and agent

Agent
DP9
Agent address
100 Pall Mall London SW1Y 5NQ GB

Planning decision

Statutory period
28 days

Additional information

Planning Portal ID
PP-14995295
Comments
0
Documents
9

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*: 29, Sackville Street W1On or next to this site · +3 more
  • 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 2026-11-03. 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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