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Planning application

5 Buckingham Mews London SW1E 6NR

Awaiting decision Westminster 26/02964/FULL Full Planning Permission Application

Works: Extension Loft or dormer Windows or glazing

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

Erection of mansard roof extension, external alterations, replacement windows, and conversion of garage to study room.

As published by the council, reference 26/02964/FULL

Application record

Reference
26/02964/FULL
Type
Full Planning Permission Application
Status
Pending
Received
6 May 2026
Validated
12 May 2026
Ward
St James's
Postcode
SW1E 6NR

Timeline

Dates from the published record

  1. 6 May 2026

    Received by Westminster

  2. 12 May 2026

    Validated

    Checked as complete and ready for consideration.

  3. 21 Jul 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 7 July 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 66 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

Ruddlesdin Design Agent, a design practice

13 applications on PlanIndex · across 5 councils · 80% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

See their track record

Documents

Plans, drawings, consultee responses and the officer's report

17 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 documents

What happens while it is decided

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 91 days. More in our guide to how long planning decisions take.

About full applications

A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 3 Buckingham Mews London SW1E 6NR

    26/02298/PASPV Submitted 7 Apr 2026 50 yards away

    89% historically approved · decision due ~2 Jun

    Installation of solar panels to existing loft roof.

    Awaiting decision 15 docs

  • 4 Buckingham Mews London SW1E 6NR

    26/05833/FULL Submitted 25 Aug 2026 50 yards away

    87% historically approved · decision due ~30 Oct

    Erection of a mansard roof extension.

    Awaiting decision Full applications Extension Loft or dormer 16 docs

  • 3 Buckingham Mews London SW1E 6NR

    26/00159/CLOPUD Submitted 13 Jan 2026 50 yards away

    Installation of solar panels to existing loft roof.

    Withdrawn Lawful development 12 docs

  • 21 Stafford Place London SW1E 6NP

    26/06268/FULL Submitted 14 Sep 2026 50 yards away

    87% historically approved · decision due ~9 Nov

    Variation of Condition 1 of planning permission dated 17 April 2026 (RN 25/08897/FULL) for: Erection of mansard roof extension namely, to allow the insertion of 7 additional rooflights within the flat roof.

    Awaiting decision Full applications Extension Loft or dormer

  • 21 Stafford Place London SW1E 6NP

    25/08897/FULL Submitted 8 Dec 2025 50 yards away

    Erection of mansard roof extension.

    Granted Full applications Extension Loft or dormer 33 docs

  • Flat 8 16 Catherine Place London SW1E 6HF

    25/07745/NMA Submitted 27 Oct 2025 50 yards away

    Amendments to planning permission dated 24 January 2023 (RN:22/07667/FULL) for: Replacement of existing roof access structure with new roof structure (Flat 8). Namely, removal of one rooflight and installation of one side casement window.

    Granted Amendments Loft or dormer Roofing +1 28 docs

In Westminster

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    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications