17 William Mews London SW1X 9HF
Refused on 4 June 2026
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 all flood resilient and resistant measures (including finished floor levels) pursuant to condition 4 of planning permission dated 17th June 2025 (RN: 24/07507/FULL).
- Received
- 7 April 2026
- Council
- City of Westminster
- Ward
- Knightsbridge & Belgravia
- ReceivedReceived7 Apr
- ValidatedValidated7 Apr
- Consult.Consultation
- TargetTarget Date2 Jun
- DecidedDecided4 Jun
Decided in 58 days (council typically 49)
About this application
This is an application to discharge conditions at 17 William Mews London SW1X 9HF. Westminster has handled 3,063 applications of this type. This one was decided in 58 days, 9 days longer than Westminster's typical decision time. The site is in 3 listed buildings nearby. There have been 3 other applications at this address. In the past year there have been 383 applications across Knightsbridge & Belgravia. We hold 1,285 applications in total for the SW1X postcode area.
92% of conditions 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
- SW1X 9HF
- Application type
- Approval of Details (Full PP)
- Scale / size
- Small
Planning application dates
- Date validated
- 7 April 2026
- Target decision date
- 2 June 2026
Applicant and agent
- Agent
- Savills
- Agent address
- 33 Margaret Street London W1G 0JD United Kingdom
Planning decision
- Statutory period
- 56 days
Site constraints
Designations that overlap or adjoin the site outline.
- Article 4 direction: Article 4 Basement Development Permitted Rights Removed
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (23)
flood storage areas, conservation 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.
© 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.
Planning history at this site
3 other applications at this property, newest first.
- 202623 Sep
Details Code of Construction Practice pursuant to condition 3 of planning permission dated 17 June 2025…
ApprovedApplication25/09184/ADFULL - 20267 Jul
Variation of Condition 1 of planning permission dated 12 June 2025 (RN: 24/07507/FULL
ApprovedVariation of conditions (s73)26/04409/FULL - 20265 May
Amendments to planning permission dated 12 June 2025 (RN: 24/07507/FULL
RefusedNon-material amendment26/02952/NMA
Source: Westminster
Contains public sector information from the Planning London Datahub, licensed under the Open Government Licence v3.0.
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Around this site
Nearby applications
- 17 William Mews London SW1X 9HF26/02952/NMA · AmendmentRefused0.0 mi
- 25 Kinnerton Street London SW1X 8EA26/02928/FULL · FullAwaiting decision0.0 mi
- First Floor And Second Floor Maisonette 11 - 12 Lowndes Square London SW1X 9HB24/07799/LBC · HeritageAwaiting decision0.0 mi
- Kinnerton Yard London25/04347/TCA · TreesApproved0.0 mi
- First Floor And Second Floor Maisonette 11 - 12 Lowndes Square London SW1X 9HB24/07798/FULL · FullAwaiting decision0.0 mi
For applicants and trades
Consultants on this application
- Savills (UK) Ltd · Agent for this application
Contractors near this project
- Avent Roofing ServicesVerifiedWestminsterRoofing0.9 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman1.8 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering4.4 mi
- Orient Construction Consultancy LimitedVerifiedLondon4.9 mi
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