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Planning application

46 Chester Square London SW1W 9EA

Awaiting decision Westminster 25/05494/FULL Full Planning Permission Application

Works: Extension Demolition Windows or glazing

Relates to 25/05497/LBC

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

Proposal

External alterations including installation of new windows; erection of rebuilt extension at rear ground floor level between main house and the mews; erection of rear first floor level rebuilt balcony; lightwell extension, partial demolition and rebuilding of the mews building with excavation of basement extension and roof level plant equipment. (Linked RN: 25/05497/LBC)

As published by the council, reference 25/05494/FULL

Application record

Reference
25/05494/FULL
Type
Full Planning Permission Application
Status
Pending
Received
1 Aug 2025
Validated
1 Aug 2025
Ward
Knightsbridge & Belgravia
Postcode
SW1W 9EA

Site history

Applications at this address on the Westminster register

This site has had 5 applications since 2025: 1 approved, 0 refused.

  • 25/07578/CLEUD Granted

    46 Chester Square London SW1W 9EA

    Use of 46 Chester Square and 46 Ebury Mews together as a single dwelling (Use Class C3).

    Decided 5 Nov 2025 Lawful development
  • 25/05498/FULL Withdrawn

    46 Chester Square London SW1W 9EA

    Erection of rear first floor orangery extension. (Linked RN: 25/05499/LBC)

    Decided 25 Sep 2025 Full applications
  • 25/05497/LBC Awaiting decision

    46 Chester Square London SW1W 9EA

    Internal and external alterations including refurbishment; replacement of ornamental scheme throughout; installation of new windows; erection of rebuilt extension at rear ground floor level between main house and the mews; erection of rear first floor level rebuilt balcony; lightwell extension; partial demolition and rebuilding of the mews building with evacuation of basement extension and roof level plant equipment. (Linked RN: 25/05494/FULL)

    Submitted 1 Aug 2025 Heritage and listed buildings
  • 25/05499/LBC Withdrawn

    46 Chester Square London SW1W 9EA

    Erection of rear first floor orangery extension. (Linked RN: 25/05498/FULL)

    Decided 25 Sep 2025 Heritage and listed buildings

Timeline

Dates from the published record

  1. 1 Aug 2025

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 26 September 2025, 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 65 days over the applications it decided in the last year.

Cases linked to this one on the register

  • 25/05497/LBC Awaiting decision

    46 Chester Square London SW1W 9EA

    Internal and external alterations including refurbishment; replacement of ornamental scheme throughout; installation of new windows; erection of rebuilt extension at rear ground floor level between main house and the mews; erection of rear first floor level rebuilt balcony; lightwell extension; partial demolition and rebuilding of the mews building with evacuation of basement extension and roof level plant equipment. (Linked RN: 25/05494/FULL)

    Submitted 1 Aug 2025 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/05497/LBC Awaiting decision

    46 Chester Square London SW1W 9EA

    Internal and external alterations including refurbishment; replacement of ornamental scheme throughout; installation of new windows; erection of rebuilt extension at rear ground floor level between main house and the mews; erection of rear first floor level rebuilt balcony; lightwell extension; partial demolition and rebuilding of the mews building with evacuation of basement extension and roof level plant equipment. (Linked RN: 25/05494/FULL)

    Submitted 1 Aug 2025 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

hgh Consulting Ltd Agent

356 applications on PlanIndex · across 37 councils · 88% 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

50 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 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

  • 46 Chester Square London SW1W 9EA

    25/05498/FULL Submitted 1 Aug 2025 50 yards away

    Erection of rear first floor orangery extension. (Linked RN: 25/05499/LBC)

    Withdrawn Full applications Extension 22 docs

  • 46 Chester Square London SW1W 9EA

    25/05497/LBC Submitted 1 Aug 2025 50 yards away

    90% historically approved · decision due ~26 Sep

    Internal and external alterations including refurbishment; replacement of ornamental scheme throughout; installation of new windows; erection of rebuilt extension at rear ground floor level between main house and the mews; erection of rear first floor level rebuilt balcony; lightwell extension; partial demolition and rebuilding of the mews building with evacuation of basement extension and roof level plant equipment. (Linked RN: 25/05494/FULL)

    Awaiting decision Heritage and listed buildings Extension Demolition +1 39 docs

  • 46 Chester Square London SW1W 9EA

    25/05499/LBC Submitted 1 Aug 2025 50 yards away

    Erection of rear first floor orangery extension. (Linked RN: 25/05498/FULL)

    Withdrawn Heritage and listed buildings Extension 18 docs

  • 47 Chester Square London SW1W 9EA

    25/08223/FULL Submitted 11 Nov 2025 50 yards away

    87% historically approved · decision due ~6 Jan

    Variation of Condition 1 of planning permssion dated 10th September 2025 (RN:24/05375/FULL) for the Demolition of No 47 Ebury Mews and the erection of a two-storey replacement mews building with new basement level. Alterations and refurbishment to No. 47 Chester Square including demolition of modern rear additions, reinstatement of lower ground floor lightwell to the rear and extension of existing lower ground floor. Construction of ground floor link from 47 Chester Square to 47 Ebury Mews, consolidation of amenity courtyard at ground floor level, other internal and external works of refurbishment to 47 Chester Square namely, to allow rebuilding of the rear of the top floor mansard roof to the main house with new dormer windows and new monopitch rooflight to the stairwell below; awning removed to the closet wing; downpipes re-routed to rear elevation of main house; revisions to detailed design of glazed link; front door to Ebury Mews entrance enlarged and addition of flues above roof to the mews house. (Linked with 25/08226/LBC)

    Awaiting decision Full applications Extension Loft or dormer +2 49 docs

  • 47 Chester Square London SW1W 9EA

    25/08226/LBC Submitted 11 Nov 2025 50 yards away

    90% historically approved · decision due ~6 Jan

    Internal alterations. (Linked with 25/08223/FULL)

    Awaiting decision Heritage and listed buildings 45 docs

  • 47 Chester Square London SW1W 9EA

    25/08383/ADFULL Submitted 17 Nov 2025 50 yards away

    87% historically approved · decision due ~12 Jan

    Details of Site Waste Management Plan, pursuant to condition 5 of planning permission dated 10 September 2025 (RN 24/05375/FULL)

    Awaiting decision Full applications 3 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront.

    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 repolacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06234/FULL Awaiting decision

    40 Grosvenor Place London SW1X 7HJ

    Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

    Received 11 Sep, published by the council 18 Sep 2026 Full applications
  • 26/06249/FULL Awaiting decision

    53 Wimpole Street London W1G 8YH

    Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

    Received 11 Sep, published by the council 18 Sep 2026 Full applications
  • 26/03576/FULL Decided

    15A Devonshire Terrace London W2 3DW

    Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

    Received 1 Jun, published by the council 11 Sep 2026 Full applications