10, Chapel Street, SW1X 7BY
Proposal
Erection of a basement extension. Replacement of existing conservatory at rear lower ground floor level with a new single storey lower ground floor extension. Installation of new windows to the rear elevation and installation of sky lights to the main roof.
- Received
- 6 March 2025
- Decided
- 10 July 2025
- Council
- City of Westminster
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.
- ReceivedSubmitted6 Mar
- ValidatedValidated
- Consult.Consultation
- TargetTarget Date
- DecidedDecided10 Jul
Decided in 126 days (council typically 49)
This is a planning application for a conservatory at 10, Chapel Street, SW1X 7BY. Westminster has handled 754 applications of this type and approves 84% of them, typically deciding them in 55 days. This one was decided in 126 days, 10 weeks longer than Westminster's median. The site is in the Belgravia conservation area, with 15 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 131 applications across KBW_22. We hold 1,157 applications in total for the SW1X postcode area.
Application Details
Applicant & Agent
Planning Application Dates
Planning Decision
Publicity
Appeal
Additional Information
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Associated applications
- 20261 Sep
Details of a completed Appendix A checklist from the Code of Construction Practice pursuant to Condition 3 of…
ApprovedDischarge of conditions26/05944/ADFULL - 202625 Jun
Detailed drawings (sections and elevations at a scale of 1:5 and 1:10) showing the window at rear third floor…
ApprovedDischarge of conditions26/04209/ADFULL - 202612 May
Details of window at rear third floor above closet wing extension and conservation skylights / new windows…
RefusedDischarge of conditions26/03107/ADFULL - 20256 Mar
Erection of a basement extension. Replacement of existing conservatory at rear lower ground floor level with…
This applicationApprovedFull planning permission25/01535/FULL
Planning constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Belgravia
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
- 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 2026-10-09. 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.
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