1 Seymour Street London W1H 7JW

26/05275/FULLAwaiting decision

Site boundary (council red line)

Proposal

Installation of louvres to front elevation. (Site include 1-9 Seymour Street)

Received: 4 August 2026
Council: City of Westminster

ReceivedReceived4 Aug
ValidatedValidated20 Aug
Consult.Consultation
TargetTarget Date
DecidedDecided

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About this application

This is a planning application at 1 Seymour Street London W1H 7JW. Westminster has handled 27,108 applications of this type. It has been with the council since 20 August 2026 and is still awaiting a decision. The site is in the Portman Estate conservation area, with 6 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 7JW

Planning application dates

Date validated: 20 August 2026

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Portman Estate
Article 4 direction: Article 4 Basement Development Permitted Rights Removed+1 more
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.

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.

Planning history at this site

7 other applications at this property, newest first.

Source: Westminster

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

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