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25-39 Thurloe Street, London, SW7 2LQ

CL/25/04775Certificates Lawful Existing Use or Dev.Approved
Lawful development certificate

Approved on 26 September 2025

Council decision: Grant Planning Permission/Consent

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

Confirmation that the works (namely, the installation of 4no padstones and 2no steel beams) have been lawfully implemented in accordance with planning permission PP/22/03263 for demolition of mansard extensions and all roof structures to 25-39 Thurloe Street, erection of single storey mansard extension across terrace to provide additional Class B1 office floorspace and a change of use of the second floor of 29 Thurloe Street from Class B1 office to Class C3 residential, and associated works (Certificate of Lawful Existing Use/Operation)

Received
1 August 2025
Ward
Brompton and Hans Town
  1. Received1 Aug
  2. Validated
  3. Consult.5 Sep
  4. Target26 Sep
  5. Decided26 Sep

Decided in 56 days (council typically 56)

About this application

This is an application to amend a permission at 25-39 Thurloe Street, London, SW7 2LQ. Kensington has handled 290 applications of this type. This one was decided in 56 days. The site is in the Thurloe Estate and Smith's Charity conservation area, with 9 listed buildings nearby. There has been 1 other application at this address. We hold 1,522 applications in total for the SW7 postcode area.

86% of amendment 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 2LQ
Application type
Certificates Lawful Existing Use or Dev.
Scale / size
Small
Parish
02
District
Thurloe and Smith's Charity

Planning application dates

Validated
1 August 2025
Consultation expiry
5 September 2025
Consultation end
5 September 2025
Target decision date
26 September 2025

Planning decision

Statutory period
56 days

Additional information

Documents
26

Site constraints

Checking the site
2/3
Council recordsAppealsFlood risk

Designations that overlap or adjoin the site outline.

  • Conservation area: Thurloe/Smith's Charity
  • Listed building: Grade II: South Kensington SubwayOn or next to this site
  • Article 4 direction: Article 4 - No 100+1 more
  • 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.

Source: Kensington

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

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