Planning application
CL/26/02249
1 Holbein Mews, London, SW1W 8NW
Proposal
Alterations to provide new windows, doors and rooflights (Certificate of Lawful Proposed Use/Development)
As published by the council, reference CL/26/02249
Timeline
Dates from the published record
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20 Apr 2026
Received by Kensington and Chelsea
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16 Jun 2026
Decision issued: Grant Planning Permission/Consent
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20 Jul 2026
Added to PlanIndex
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1 Aug 2026
Status changed to Decided
Previously Pre-Determination Stage.
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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CL/26/02236 Granted
1 Holbein Mews, London, SW1W 8NW
Removal of chimney (Certificate of Lawful Proposed Use/Development)
-
ARB/26/01017 Granted
Flat 61, Holbein House, Holbein Place, London, SW1W 8PW
Prune (as specified)
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26/03345/FULL Awaiting decision
19 Passmore Street London SW1W 8HR
Variation of condition 1 of planning permission dated 24th June 2024 (RN:24/01203/FULL) for the Variation of Conditions 1 and 12 of planning permission dated 7th February 2024 (RN 22/07967/FULL) for the alterations to front fenestration, the provision of a new basement, mansard roof, extensions at rear ground and first floor level and installation of air source heat pump in rear basement lightwell, to allow rebuilding of party walls and approval of reclamation audit. NAMELY, to allow materials associated with the flat roof of the mansard level, ground floor lightwell guarding and fenestration to the rear. Introduction of a rear lower ground floor stair to the lightwell; To amend the previously approved rear elevation and roof plan in accordance with the revised drawings submitted as part of this application.
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25/05154/FULL Awaiting decision
74A Pimlico Road London SW1W 8LS
Replace existing single-glazed windows with double or triple glazed windows and replace front door.
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26/03083/ADFULL Awaiting decision
19 Passmore Street London SW1W 8HR
Detailed drawings and a bio-diversity management plan in relation to the green and blue roofs to include construction method, layout, species and maintenance regime pursuant to discharge of condition 16 of planning permission dated 24th June 2024 (RN: : 24/01203/FULL).
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26/03078/ADFULL Awaiting decision
9 Passmore Street London SW1W 8HR
Details of windows, dormer window details, rooflights and PV panels and detailed drawings and a bio-diversity management plan in relation to the green and blue roofs to include construction method, layout, species and maintenance regime pursuant to conditions 6 and 16 of planning permission dated 7th February 2024 (RN: 24/01197/FULL).
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)
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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)