Planning application
25/08897/FULL
21 Stafford Place London SW1E 6NP
Proposal
Erection of mansard roof extension.
As published by the council, reference 25/08897/FULL
Timeline
Dates from the published record
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8 Dec 2025
Received by Westminster
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17 Apr 2026
Decision issued: Application Permitted
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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 full applications applications
How this application type works
A full application seeks permission for a complete, detailed proposal in one go: siting, design, access and landscaping are all fixed at this stage. It is the standard route for new buildings, conversions and changes of use. The statutory target is eight weeks for smaller schemes and thirteen weeks for major development, though complex cases often take longer by agreement.
Nearby applications
Within 500 metres
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26/00159/CLOPUD Withdrawn
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26/02964/FULL Awaiting decision
5 Buckingham Mews London SW1E 6NR
Erection of mansard roof extension, external alterations, replacement windows, and conversion of garage to study room.
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26/02298/PASPV Awaiting decision
3 Buckingham Mews London SW1E 6NR
Installation of solar panels to existing loft roof.
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25/05074/ADLBC Granted
1 Palace Street And 1 - 3 Buckingham Gate London SW1E 6JP
Detail of a written, drawn and photographic report following removal of the paint and areas of detached stucco, and any subsequent further investigation of the condition of the remaining render and underlying substrate; including a) a detailed elevation showing (i) the areas of loose or evidently failing render which have been removed in Phase 1; (ii) the areas of render requiring further intrusive restoration, particularly replacement; and (iii) the areas of render in sound condition and/or requiring only like-for-like in-situ repairs; b) a detailed Condition Report, analysing and recording what has been found, and providing the justification for the works; and c). a detailed Conservation Method Statement for the removal of the existing render, the temporary protection of those sections of render and mouldings to be retained, and for the re-rendering, restoration works and re-painting works pursuant to Condition 3 (a, b and c) of listed building consent dated 13 October 2023 (RN: 23/05763/LBC).
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25/06649/ADLBC Granted
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25/07160/ADFULL Awaiting decision
4 - 5 Buckingham Gate London SW1E 6JP
Details of flagpoles and fixings pursuant to Condition 13 (iv) of planning permission dated 20 January 2025 (RN24/06734/FULL)
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26/04989/FULL Awaiting decision
1 Kildare Terrace London W2 5JT
Erection of a mansard roof extending over the main house and side wing, replacement lower ground rear extension with roof terrace above, lowering of lower ground floor slab, installation of an air source heat pump in rear garden, new front boundary treatment, and new second floor window on the north elevation.
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26/04986/FULL Awaiting decision
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