Planning application
25/05354/LBC
Chatham House 10 St James's Square London SW1Y 4LE
Proposal
Remedial structural works to the lightwell and basement vault.
As published by the council, reference 25/05354/LBC
Timeline
Dates from the published record
-
31 Jul 2025
Received by Westminster
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12 Aug 2025
Validated
Checked as complete and ready for consideration.
-
26 Sep 2025
Decision issued: Application Permitted
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21 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 heritage and listed buildings applications
How this application type works
Heritage applications concern listed buildings and conservation areas. Listed building consent is needed for works, inside or out, that affect the special interest of a listed building, and carrying out such works without consent is a criminal offence. The council weighs harm to the heritage asset against any public benefit of the proposal.
More on heritage and listed buildings applications in our guide
Nearby applications
Within 500 metres
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26/03269/LBC Awaiting decision
Chatham House 10 St James's Square London SW1Y 4LE
Removal of internal partition wall in the office spaces at the second floor.
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25/09400/FULL Awaiting decision
11 - 12 St James's Square London SW1Y 4LB
External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09401/LBC)
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25/09401/LBC Awaiting decision
11 - 12 St James's Square London SW1Y 4LB
External and internal alterations, including the partial removal of non-heritage additions and the remodelling of the 1980s rear extension, provision of terraces and roof garden and associated works. (Linked to 25/09400/FULL)
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26/04577/ADFULL Awaiting decision
7 St James's Square London SW1Y 4JU
Details of precise location of each external item; product specifications, finishes and dimensions; sections and fixing details; and cable routes, penetrations and any making good of historic fabric pursuant to condition 4 of planning permission dated 19 March 2026 (RN: 25/07345/FULL).
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26/00842/FULL Awaiting decision
13 Mason's Yard London SW1Y 6BU
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25/05118/ADFULL Granted
103 - 105 Jermyn Street London SW1Y 6EE
Details of signed Appendix A pursuant to condition 21 of planning permission dated 22 August 2024 (RN: 24/02152/FULL).
Other heritage and listed buildings applications
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26/04979/LBC Awaiting decision
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26/04987/LBC Awaiting decision
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26/04995/LBC Awaiting decision
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