Planning application
4 Buckingham Mews London SW1E 6NR
Works: Extension Loft or dormer
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Erection of a mansard roof dormer extension at second floor level.
As published by the council, reference 26/05833/FULL
Application record
- Reference
- 26/05833/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 25 Aug 2026
- Validated
- Date not published
- Ward
- St James's
- Postcode
- SW1E 6NR
Timeline
Dates from the published record
-
25 Aug 2026
Received by Westminster
-
4 Sep 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 20 October 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 61 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
Agent on file, an architecture practice registered in Borehamwood
20 applications on PlanIndex · across 6 councils
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
16 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.
Trade members open them from here.
Open the documentsWhat happens while it is decided
The process from here
This application is with Westminster for determination. The council publicises it, consults neighbours and technical bodies where required, and weighs the responses against local and national planning policy.
The statutory target is eight weeks for most applications and thirteen for major development, though extensions of time are common. Comments carry most weight while the case is undecided, so check the council portal for the deadline if you want to respond.
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
-
21 Stafford Place London SW1E 6NP
Erection of mansard roof extension.
Granted Full applications Extension Loft or dormer 33 docs -
5 Buckingham Mews London SW1E 6NR
87% historically approved · decision due ~7 Jul
Erection of mansard roof extension, external alterations, replacement windows, and conversion of garage to study room.
Awaiting decision Full applications Extension Loft or dormer +1 17 docs -
3 Buckingham Mews London SW1E 6NR
Installation of solar panels to existing loft roof.
Withdrawn Lawful development 12 docs -
3 Buckingham Mews London SW1E 6NR
89% historically approved · decision due ~2 Jun
Installation of solar panels to existing loft roof.
Awaiting decision 15 docs -
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).
Granted Conditions 33 docs -
4 - 5 Buckingham Gate London SW1E 6JP
Details of flagpoles and fixings, and signage and fixings pursuant to Condition 5 (parts iv and v) of listed building consent dated 20 January 2025 (RN: 24/06735/LBC)
Granted Conditions 2 docs
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