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Halcyon London International School 33 Seymour Place London W1H 5AP

26/03579/ADVRefused

Refused on 21 September 2026

Site boundary (council red line)

Proposal

Display of one non illuminated fascia sign measuring 1.25m x 5.5m and one non illuminated projecting sign meauring 5m x 0.75m.

Submitted
1 June 2026
  1. Received1 Jun
  2. Validated
  3. Consult.
  4. Target
  5. Decided21 Sep

Decided in 112 days

About this application

This is a planning application for signage at Halcyon London International School 33 Seymour Place London W1H 5AP. Westminster has handled 27,108 applications of this type. This one was decided in 112 days, 9 weeks longer than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 13 listed buildings nearby. There has been 1 other application at this address. We hold 896 applications in total for the W1H postcode area.

Application details

Postcode
W1H 5AP

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Portman Estate
  • Listed building: Grade II: 29 and 30, Upper Berkeley Street W1On or next to this site · +2 more
  • Article 4 direction: Article 4 Basement Development Permitted Rights Removed
  • Brownfield land register: 33 Seymour Place London W1H 5APRegister 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.

Source: Westminster

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

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