18, Dartmouth Street, London, SW1H 9BL

25/05068/FULLHouseholder planning permissionPermitted

Householder

Proposal

Rear infill of courtyard to create larger basement (no excavation required), installation of French window on the ground floor, installation of 4 no. conservation roof lights

Received: 22 July 2025
Decided: 11 September 2025
Council: City of Westminster

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.

ReceivedSubmitted22 Jul
ValidatedValidated
Consult.Consultation
TargetTarget Date
DecidedDecided11 Sep

Decided in 51 days (council typically 49)

7 weeks typical decision time in Westminster77% of householder planning permission applications approved

This is a planning application for window replacement at 18, Dartmouth Street, London, SW1H 9BL. Westminster has handled 216 applications of this type and approves 77% of them, typically deciding them in 55 days. This one was decided in 51 days, 4 days quicker than Westminster's median. The site is in the Broadway and Christchurch Gardens conservation area, with 9 listed buildings nearby. There are no previous applications recorded at this address. In the past year there have been 190 applications across SJW_22. We hold 408 applications in total for the SW1H postcode area.

Application Details

Reference

25/05068/FULL

Address

18, Dartmouth Street, London, SW1H 9BL

Postcode

SW1H 9BL

Local Authority

Westminster

Application Type

Householder planning permission

Decision Status

Permitted

Applicant & Agent

Planning Application Dates

Date Decided

11 September 2025

Date Submitted

22 July 2025

Planning Decision

Publicity

Appeal

Additional Information

Coordinates

51.499954, -0.132366

Enriching application data

2/3

Council recordsAppealsFlood risk

Source: Westminster

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

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Planning history at this site

2 other applications at this property, newest first.

Planning constraints

Designations that overlap or adjoin the site outline.

Flood zone 3: High probability (rivers and sea)
Conservation area: Broadway And Christchurch Gardens
Article 4 direction: Article 4 Basement Development Permitted Rights Removed

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.

© 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 2026-10-09. The most publicly available up to date Historic England GIS Data can be obtained from HistoricEngland.org.uk.

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