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Planning application

2A Lyall Mews London SW1X 8DJ

Awaiting decision Westminster 26/01406/FULL Full Planning Permission Application

Works: 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

External alterations including: lowering of window openings at first floor on the front elevation and introduction of Juliet balconies, replacement of garage door, new rooflight, upgrades to the fenestration to front and rear and rebuilding of front entrance steps.

As published by the council, reference 26/01406/FULL

Application record

Reference
26/01406/FULL
Type
Full Planning Permission Application
Status
Pending
Received
5 Mar 2026
Validated
11 Mar 2026
Ward
Knightsbridge & Belgravia
Postcode
SW1X 8DJ

Site history

Applications at this address on the Westminster register

This site has had 2 applications since 2026.

  • 26/06136/ADFULL Decided

    2A Lyall Mews London SW1X 8DJ

    Detailed drawings showing amended proposals for the first floor front elevation's fenestration, and detailed drawings of the replacement garage door, rooflight, windows other than the first-floor front elevation fenestration, Juliet balconies and associated metalwork and rebuilt front entrance steps, pursuant to condition 4 and 5 of planning permission dated 16 April 2026 (RN:26/01406/FULL)

    Submitted 8 Sep 2026

Timeline

Dates from the published record

  1. 5 Mar 2026

    Received by Westminster

  2. 11 Mar 2026

    Validated

    Checked as complete and ready for consideration.

  3. 21 Jul 2026

    Added to PlanIndex

  4. Decision

    Awaiting decision

    Decision expected by 6 May 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 91 days over the applications it decided in the last year.

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/06136/ADFULL Decided

    2A Lyall Mews London SW1X 8DJ

    Detailed drawings showing amended proposals for the first floor front elevation's fenestration, and detailed drawings of the replacement garage door, rooflight, windows other than the first-floor front elevation fenestration, Juliet balconies and associated metalwork and rebuilt front entrance steps, pursuant to condition 4 and 5 of planning permission dated 16 April 2026 (RN:26/01406/FULL)

    Submitted 8 Sep 2026

Who's behind it

Company information only, from the register and Companies House

Guy Stansfeld Architecture Agent, an architecture practice registered in London

Active · incorporated 2024 · London

4 applications on PlanIndex · across 2 councils

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

28 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.

Watch members (£5 a month) open the document list from here.

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 119 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

  • 2A Lyall Mews London SW1X 8DJ

    26/06136/ADFULL Submitted 8 Sep 2026 50 yards away

    89% historically approved · decision due ~3 Nov

    Detailed drawings showing amended proposals for the first floor front elevation's fenestration, and detailed drawings of the replacement garage door, rooflight, windows other than the first-floor front elevation fenestration, Juliet balconies and associated metalwork and rebuilt front entrance steps, pursuant to condition 4 and 5 of planning permission dated 16 April 2026 (RN:26/01406/FULL)

    Decided Loft or dormer Windows or glazing

  • Basement And Ground Floor Maisonette 53 Eaton Place London SW1X 8DE

    20/05723/NMA Submitted 11 Sep 2020 50 yards away

    Amendments to planning permission dated 31 July 2019 (RN: 19/02607) for Amalgamation of the lower ground and ground floor flat. Excavation of a single storey basement beneath closet wing and part of rear courtyard. Lowering of the floor in front basement vault. Erection of two storey rear infill extension. Erection of mechanical plant and enclosure in rear courtyard. Alterations to rear elevation including new window openings and replacement windows and works of repair and refurbishment; Namely, minor amendments including repositioning of boiler flue and airbricks on rear ground floor elevation, installation of plant bed within lightwell paving at rear lower ground floor level and installation of green wall on party wall in rear lightwell.

    Granted Amendments Extension Windows or glazing 64 docs
    Small domestic

  • Third Floor And Fourth Floor Maisonette 49 Eaton Place London SW1X 8DE

    26/01352/LBC Submitted 3 Mar 2026 50 yards away

    90% historically approved · decision due ~28 Apr

    Installation of air conditioning system with external condenser at roof level; new roof light; internal alterations and refurbishment works.

    Awaiting decision Heritage and listed buildings Loft or dormer Roofing 13 docs

  • Third Floor And Fourth Floor Maisonette 49 Eaton Place London SW1X 8DE

    26/01351/FULL Submitted 3 Mar 2026 50 yards away

    88% historically approved · decision due ~28 Apr

    Installation of air conditioning condenser unit at roof level and new roof light for maintenance access.

    Awaiting decision Full applications Loft or dormer Roofing 18 docs

  • Third Floor And Fourth Floor Maisonette 49 Eaton Place London SW1X 8DE

    26/03623/ADLBC Submitted 3 Jun 2026 50 yards away

    89% historically approved · decision due ~29 Jul

    Details of new doors pursuant to condition 7 of listed building consent dated 28th April 2026 (RN:26/01352).

    Awaiting decision Conditions 5 docs

  • 59 Eaton Place London SW1X 8DF

    25/08951/FULL Submitted 9 Dec 2025 50 yards away

    Replacement of windows; installation of air conditioning condenser units and acoustic screen at rear lower ground floor level; formation of new door openings at lower ground floor rear elevation; installation of external spiral stair within rear courtyard; and associated external alterations.

    Granted Full applications Windows or glazing 37 docs

In Westminster

  • 26/07528/FULL Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

    Received 5 Nov, published by the council 6 Nov 2026 Full applications
  • 26/05200/FULL Decided

    1 The Court House 165 Seymour Place London W1H 4PU

    Installation of waterproofing system to the existing lead flat roofs

    Received 3 Aug, published by the council 28 Aug 2026 Full applications
  • 26/07521/FULL Awaiting decision

    Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

    Installation of one external condenser unit

    Received 4 Nov, published by the council 6 Nov 2026 Full applications
  • 26/07508/FULL Awaiting decision

    Buckingham Palace The Mall London SW1A 1AA

    Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

    Received 4 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07472/FULL Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

    Received 3 Nov, published by the council 6 Nov 2026 Full applications