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Planning application

46 Eaton Place London SW1X 8AL

Granted Westminster 25/04440/LBC Listed Building Consent Application

Works: Extension Loft or dormer

Relates to 25/04439/FULL

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Erection of extensions at rear lower-ground, ground, first and second floor levels with roof terrace at rear first floor level; replacement mansard roof and facade alterations to mews building; basement extension; roof terrace, plant enclosure and lift overrun at main roof level; and associated internal alterations including to plan form and provision of lift (Site includes 20 Eaton Mews North). (Linked with 25/04439/FULL)

As published by the council, reference 25/04440/LBC

Application record

Reference
25/04440/LBC
Type
Listed Building Consent Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
27 Jun 2025
Validated
27 Jun 2025
Decided
17 Mar 2026
Ward
Knightsbridge & Belgravia
Decision by
Complex Delegated Decision
Postcode
SW1X 8AL

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2025: 3 approved, 0 refused.

  • 26/06751/ADFULL Awaiting decision

    46 Eaton Place London SW1X 8AL

    Details of Remediation Strategy pursuant to partial discharge of Condition 5 (Phase 3) of planning permission dated 17th March 2026 (RN: 25/04439/FULL)

    Submitted 2 Oct 2026
  • 25/09311/CLOPUD Granted

    46 Eaton Place London SW1X 8AL

    Confirmation that the planning permission dated 26th April 2023 (RN: 22/05260/FULL) for the 'Use of existing buildings as two separate dwellings with associated alterations and extensions, including new rear courtyard with green living wall at lower ground and ground floor levels, creation of roof terraces at rear upper ground floor and main roof levels, alterations to terrace at first floor level, replacement rear closet wing extension at first and second floor levels, replacement of mansard roof, and replacement of windows and doors on all elevations (site includes 20 Eaton Mews North)' was lawfully implemented prior to the expiration date and that it is lawful to complete the outstanding works.

    Decided 23 Feb 2026 Lawful development
  • 25/04439/FULL Granted

    46 Eaton Place London SW1X 8AL

    Erection of extensions at rear lower-ground, ground, first and second floor levels with roof terrace at rear first floor level; replacement mansard roof and facade alterations to mews building; basement extension; roof terrace, plant enclosure and lift overrun at main roof level. Change of use from embassy to two dwellings (Site includes 20 Eaton Mews North).

    Decided 17 Mar 2026 Full applications

Timeline

Dates from the published record

  1. 27 Jun 2025

    Received by Westminster

  2. 17 Mar 2026

    Decision issued: Application Permitted

  3. 30 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/04439/FULL Granted

    46 Eaton Place London SW1X 8AL

    Erection of extensions at rear lower-ground, ground, first and second floor levels with roof terrace at rear first floor level; replacement mansard roof and facade alterations to mews building; basement extension; roof terrace, plant enclosure and lift overrun at main roof level. Change of use from embassy to two dwellings (Site includes 20 Eaton Mews North).

    Decided 17 Mar 2026 Full applications

Who's behind it

Company information only, from the register and Companies House

Montagu Evans LLP Agent, registered in London

Active · incorporated 2005 · London

1,330 applications on PlanIndex · across 128 councils · 97% granted

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

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Documents

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

122 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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What this grant of permission means

Westminster granted permission on 17 March 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About heritage and listed building applications

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 46 Eaton Place London SW1X 8AL

    25/04439/FULL Submitted 27 Jun 2025 50 yards away

    Erection of extensions at rear lower-ground, ground, first and second floor levels with roof terrace at rear first floor level; replacement mansard roof and facade alterations to mews building; basement extension; roof terrace, plant enclosure and lift overrun at main roof level. Change of use from embassy to two dwellings (Site includes 20 Eaton Mews North).

    Granted Full applications Extension Loft or dormer 144 docs
    Several homes

  • 46 Eaton Place London SW1X 8AL

    25/09311/CLOPUD Submitted 23 Dec 2025 50 yards away

    Confirmation that the planning permission dated 26th April 2023 (RN: 22/05260/FULL) for the 'Use of existing buildings as two separate dwellings with associated alterations and extensions, including new rear courtyard with green living wall at lower ground and ground floor levels, creation of roof terraces at rear upper ground floor and main roof levels, alterations to terrace at first floor level, replacement rear closet wing extension at first and second floor levels, replacement of mansard roof, and replacement of windows and doors on all elevations (site includes 20 Eaton Mews North)' was lawfully implemented prior to the expiration date and that it is lawful to complete the outstanding works.

    Granted Lawful development Extension Loft or dormer +1 13 docs

  • 52 Eaton Place London SW1X 8AL

    26/02230/ADLBC Submitted 2 Apr 2026 50 yards away

    89% historically approved · decision due ~28 May

    Detailed elevations and section of the front door and its surrounds, pursuant to condition 4 of Listed Building Consent dated 25th September 2025 (25/05109/LBC)

    Awaiting decision Conditions 4 docs

  • 52 Eaton Place London SW1X 8AL

    25/08102/ADFULL Submitted 6 Nov 2025 50 yards away

    Details of the front door pursuant to Condition 4 of planning permission dated 25th September 2025 (RN: 25/05108/FULL).

    Refused Full applications 8 docs

  • 52 Eaton Place London SW1X 8AL

    26/07131/LBC Submitted 19 Oct 2026 50 yards away

    90% historically approved · decision due ~16 Dec

    Replacement of the approved second-floor rear sash window with painted timber French doors. (Linked with 26/05674/NMA)

    Awaiting decision Heritage and listed buildings Windows or glazing

  • 52 Eaton Place London SW1X 8AL

    26/05674/NMA Submitted 19 Aug 2026 50 yards away

    93% historically approved · decision due ~14 Oct

    Amendments to planning permission dated 25 September 2025 (25/05108/FULL) for: Alterations to rear extension at first floor level including creation of rear roof terrace at second floor level; replacement of first and second floor level front windows with double glazed timber sash windows; replacement of front door; reinstatement of period windows and doors, namely to allow replacement of second floor rear full height sash window with set of French doors.

    Decided Amendments Extension Windows or glazing

In Westminster

  • 26/07202/LBC Awaiting decision

    Basement East And Ground Floor And First Floor 33 Weymouth Street London W1G 7BY

    Replacement of 13 doorsets with fire doors.

    Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings
  • 26/07183/LBC Awaiting decision

    306 - 308 Regent Street London W1B 3AT

    Installation of a manually operated retractable fabric awning to the existing shopfront at 308 Regent Street, comprising an orange fabric canopy with discreet printed lettering to the front valance, together with associated supporting framework, mounting brackets and fixings to the existing fa?ade.

    Received 21 Oct, published by the council 22 Oct 2026 Heritage and listed buildings
  • 26/07191/LBC Awaiting decision

    6 Wilton Place London SW1X 8RH

    Layout alterations and replacement of internal doors.

    Received 21 Oct, published by the council 22 Oct 2026 Heritage and listed buildings
  • 26/07199/LBC Awaiting decision

    49 Queen's Gardens London W2 3AA

    Erection of a mansard roof extension incorporating rooflights and a rear balcony; installation of Juliet balconies at ground and first floor levels to the rear; demolition of the existing courtyard extension and erection of a single-storey infill extension; extension of the rear wing at first floor (mezzanine) and second floor levels; fenestration alterations including the installation of new windows; stucco repairs and partial rebuilding of the rear extensions; and associated internal alterations at all levels. (Linked to 26/07198/FULL)

    Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings
  • 26/07192/LBC Awaiting decision

    119 Warwick Way London SW1V 4HS

    Conversion and internal alterations to the ground floor flat (Retrospective)

    Received 21 Oct, published by the council 23 Oct 2026 Heritage and listed buildings