18, Seymour Street, W1H 7HU

25/04170/ADLBCApproval of details reserved by a condition (discharge)Approved

Discharge / amendments

Approved on 30 June 2025

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

Details of the detail design, size and location of the new fire surrounds, ceiling roses, skirtings and cornices, detailed drawings of the all new windows and detailed design of the re-covering of front entrance steps and replacement stairs to the front lightwell, including retention of the top stone step pursuant to condition 2, 4 and 6 of listed building dated 8th August 2023 (RN:23/02367/LBC)

Submitted: 18 June 2025
Council: City of Westminster

ReceivedSubmitted18 Jun
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided30 Jun

Decided in 12 days (council typically 49)

About this application

This is a planning application for window replacement at 18, Seymour Street, W1H 7HU. Westminster has handled 1,733 applications of this type. This one was decided in 12 days, 5 weeks quicker than Westminster's typical decision time. The site is in the Portman Estate conservation area, with 13 listed buildings nearby. There have been 6 other applications at this address. In the past year there have been 191 applications across MBW_22. We hold 896 applications in total for the W1H postcode area.

89% of approval of details reserved by a condition (discharge) 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.See what's approved near your address

Application details

Postcode: W1H 7HU
Application type: Approval of details reserved by a condition (discharge)

Site constraints

Checking the site

2/3

Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

Conservation area: Portman EstatePart of the site
Listed building: Grade II: 1, New Quebec Street W1On this site · +6 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.

Planning history at this site

13 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.

Track this application

Get email alerts when there is a planning decision or status change.

Get email alerts near W1H

New planning applications delivered to your inbox daily.

Around this site

Nearby applications

Discuss this application on r/PlanningPermissionUK

For applicants and trades

Contractors near this project

Find contractors for windows & doors near this site

View all contractors

What's been approved on your street?

See what the council approved and refused near this address for the project you have in mind, and the rules that apply here.

Get The Signal Report