18 Seymour Street London W1H 7HU

26/05010/LBCApproved

Approved on 15 September 2026

Site boundary (council red line)

Proposal

Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and proximity reader within the reveal of the entrance doorway. (Linked with 26/05009/FULL)

Submitted: 27 July 2026
Council: City of Westminster

ReceivedSubmitted27 Jul
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided15 Sep

Decided in 50 days

About this application

This is a planning application at 18 Seymour Street London W1H 7HU. Westminster has handled 27,108 applications of this type. This one was decided in 50 days. The site is in the Portman Estate conservation area, with 13 listed buildings nearby. There have been 6 other applications at this address. We hold 896 applications in total for the W1H postcode area.

Application details

Postcode: W1H 7HU

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: 1, New Quebec Street W1On this site · +2 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.

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.

Associated applications

2026
30 Jul
Details of new vault doors pursuant to condition 3 of listed building consent dated 01 April 2026 (RN…
ApprovedListed building consentFiled alongside26/05164/ADLBC
2026
27 Jul
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and…
ApprovedApplicationPart of26/05009/FULL
2026
27 Jul
Installation of external lighting to the front entrance and front basement lightwell, entry touch panel and…
This applicationApprovedListed building consent26/05010/LBC

Planning history at this site

12 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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