Planning application
CL/25/04775
25-39 Thurloe Street, London, SW7 2LQ
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)
As published by the council, reference CL/25/04775
Timeline
Dates from the published record
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1 Aug 2025
Received by Kensington and Chelsea
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26 Sep 2025
Decision issued: Grant Planning Permission/Consent
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20 Jul 2026
Added to PlanIndex
What a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
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PP/24/06082 Granted
Basement and Ground Floor, 10-12 Exhibition Road, London, SW7 2HE
Replacement of windows at ground floor shopfront
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CA/26/01683 Granted
45 Thurloe Street, London, SW7 2LQ
Installation of 2no. sets of non-illuminated fascia signage (letters reading BLANK STREET) to Thurloe Street and Cromwell Street elevations.
-
PP/26/02210 Granted
Basement and Ground Floor, 8 Exhibition Road, London, SW7 2HF
Installation of 2no. AC units to rear ground floor level
-
PP/26/01576 Withdrawn
Second Floor, 23-26 Cromwell Place, London, SW7 2LD
Installation of AC condenser to rear of building fitted under staircase (Retrospective Application)
-
ARB/26/03144 Granted
2 Thurloe Street, London, SW7 2ST
Prune 4x Large London Plane (t 1- t 4) in rear garden
-
CL/25/05536 Withdrawn
Basement and Ground Floor Flat, 14 Thurloe Street, London, SW7 2ST
***WITHDRAWN***Confirmation that the current and historical use of the Basement and Ground Floor flats (since approx. 2010) is as a holiday and short term letting business (Class C5). (Certificate of Lawful Existing Use)
Other lawful development applications
In Kensington and Chelsea
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CL/26/01267 Granted
1 Bray Place, London, SW3 3LL
Confirmation that the existing structure at no. 27 Coulson Street / 1 Bray Place was built in the early 1970s as a single development over three floors (basement to first floor) after the demolition of a previous infill building in 1971 (Certificate of Lawful Existing Use)
-
CL/26/02700 Granted
27 Lansdowne Road, London, W11 3AG
Provision of lead flashing to parapet/cornice lines and painting of windows and existing painted areas of the building in soft white (Certificate of Proposed Use/Development).
-
CL/26/02515 Granted
Flats A and C, 61 Holland Park, London, W11 3SJ
Reconfiguration of the accommodation at Flat A and Flat C to create one four-bed dwelling and one one-bed dwelling (Certificate of Lawful Proposed Development / Use)
-
CL/26/03998 Awaiting decision
87 Addison Road, London, W14 8ED
Confirmation that the existing A/C Units & Screening to the north and south sides on the flat roofs at ground and first floor levels are lawful (Certificate of Lawful Existing Use/Development)
-
CL/26/04000 Awaiting decision
191 Freston Road, London, W10 6TH
Confirmation that the use of the property as Class F1(a) (Education) is lawful (Certificate of Lawful Existing Use/Development)