Basement To First Floor Flat, 75 Onslow Square, London, SW7 3LS
Approved on 17 November 2025
Council decision: Grant Planning Permission/Consent4 conditions
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
Replacement of windows and doors with slimline glazing to front, side and rear elevations to match existing. New traditional sash windows and doors to rear terrace. Internal alterations at lower ground, ground and first floor levels. Replacement of non-original internal doors. Removal of non-original finish to floors and stairs. New paving to rear garden and terrace.
- Received
- 8 September 2025
- Ward
- Courtfield
- ReceivedReceived8 Sep
- ValidatedValidated
- Consult.Consultation17 Oct
- TargetTarget Date17 Nov
- DecidedDecided17 Nov
Decided in 70 days (council typically 56)
About this application
This is a full planning application for window replacement at Basement To First Floor Flat, 75 Onslow Square, London, SW7 3LS. Kensington has handled 5,404 applications of this type. This one was decided in 70 days, 2 weeks longer than Kensington's typical decision time. The site is in a conservation area, with 4 listed buildings nearby. There has been 1 other application at this address. In the past year there have been 191 applications across Courtfield. We hold 1,522 applications in total for the SW7 postcode area.
92% of full applications at Royal Borough of Kensington and Chelsea were approved. Across all application types, the council typically decides in about 8 weeks (median).
Based on decided applications received in the last 3 years.Planning something similar? See what gets approved on your street
Application details
- Postcode
- SW7 3LS
- Application type
- Planning Permission
- Scale / size
- Medium
- Parish
- 06
- District
- Thurloe and Smith's Charity
Planning application dates
- Validated
- 8 September 2025
- Consultation expiry
- 17 October 2025
- Consultation end
- 17 October 2025
- Target decision date
- 17 November 2025
Planning decision
- Statutory period
- 70 days
Additional information
- Documents
- 56
Site constraints
Designations that overlap or adjoin the site outline.
- Conservation area: Thurloe/Smith's Charity
- Article 4 direction: Article 4 - No 100
- Tree Preservation OrderCovers the site
- Flood zone 1: Low probability (rivers and sea)
Also checked, none recorded (20)
flood storage areas, 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.
Associated applications
- 20258 Sep
Replacement of windows and doors with slimline glazing to front, side and rear elevations to match existing…
ApprovedListed building consentFiled alongsideLB/25/05427 - 20258 Sep
Replacement of windows and doors with slimline glazing to front, side and rear elevations to match existing…
This applicationApprovedFullPP/25/05426
Planning history at this site
1 other application at this property, newest first.
Source: Kensington
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
- Basement To First Floor Flat, 75 Onslow Square, London, SW7 3LSLB/25/05427 · HeritageApproved0.0 mi
- 23 Sumner Place, London, SW7 3EGLB/25/06077 · HeritageApproved0.0 mi
- 23 Sumner Place, London, SW7 3EGPP/25/06076 · FullApproved0.0 mi
- 4 Sumner Place, London, SW7 3EELB/25/06350 · HeritageApproved0.0 mi
- 7 Sumner Place, LONDON, SW7 3EEARB/23/06168 · TreesApproved0.0 mi
For applicants and trades
Contractors near this project
Find contractors for renovations & refurbishments near this site- Avent Roofing ServicesVerifiedWestminsterRoofing1.9 mi
- Atlas South Technical Service LimitedVerifiedLondonProperty MaintenanceHandyman2.6 mi
- Nova Coat & PlasterVerifiedStreatham, LondonRenovations & RefurbishmentsPlastering4.2 mi
- Orient Construction Consultancy LimitedVerifiedLondon5.8 mi
Planning something similar?
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