Planning application
11A Belgrave Square London SW1X 8PH
Works: Demolition
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Internal and external works including demolition of partition walls, fixtures and fittings, and lightwell excavation at lower ground level (Confirmation of lawful implementation of the planning permission dated 21st September 2022 (RN: 22/01791/FULL) for excavation works to lower ground floor and basement to achieve swimming pool depth and new storey; relocation of existing mechanical ventilation plant within the existing roof void with two grilles in roof; new ventilation shaft and metal grating in the front lightwell.
As published by the council, reference 25/09302/CLEUD
Application record
- Reference
- 25/09302/CLEUD
- Type
- Certificate of Lawfulness (existing)
- Status
- Decided
- Decision
- Granted As published: Application Permitted
- Received
- 23 Dec 2025
- Validated
- 23 Dec 2025
- Decided
- 11 Mar 2026
- Ward
- Knightsbridge & Belgravia
- Decision by
- Delegated Decision
- Postcode
- SW1X 8PH
Site history
Applications at this address on the Westminster register
This site has had 3 applications since 2025: 1 approved, 0 refused.
-
26/05045/LBC Decided
11A Belgrave Square London SW1X 8PH
Alteration of the existing roof and layout alterations to the loft level to create a concealed terrace area and additional plant space along with associated internal alterations.
-
26/05044/FULL Decided
11A Belgrave Square London SW1X 8PH
Alteration of the existing roof and layout alterations to the loft level to create a concealed terrace area and additional plant space along with associated internal alterations.
Timeline
Dates from the published record
-
23 Dec 2025
Received by Westminster
-
11 Mar 2026
Decision issued: Application Permitted
-
20 Jul 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Savills Limited Agent, registered in London
Active · incorporated 1987 · London
2,189 applications on PlanIndex · across 186 councils · 92% granted
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Plans, drawings, consultee responses and the officer's report
11 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
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Open the documentsWhat this grant of permission means
Westminster granted permission on 11 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.
About lawful development applications
A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.
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