Skip to content
PlanIndex Get alerts
Menu

Planning application

46 Eaton Place London SW1X 8AL

Granted Westminster 25/04439/FULL Full Planning Permission Application

Works: Extension Loft or dormer Several homes

Read from the description, not a valuation. How we read the register

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. Change of use from embassy to two dwellings (Site includes 20 Eaton Mews North).

As published by the council, reference 25/04439/FULL

Application record

Reference
25/04439/FULL
Type
Full Planning Permission 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
  • 25/04440/LBC 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; and associated internal alterations including to plan form and provision of lift (Site includes 20 Eaton Mews North). (Linked with 25/04439/FULL)

    Decided 17 Mar 2026 Heritage and listed buildings

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

2 later applications on the register refer to this one:

  • 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
  • 25/04440/LBC 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; and associated internal alterations including to plan form and provision of lift (Site includes 20 Eaton Mews North). (Linked with 25/04439/FULL)

    Decided 17 Mar 2026 Heritage and listed buildings

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.

See their track record

Documents

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

144 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 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 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 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

  • 46 Eaton Place London SW1X 8AL

    25/04440/LBC 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; and associated internal alterations including to plan form and provision of lift (Site includes 20 Eaton Mews North). (Linked with 25/04439/FULL)

    Granted Heritage and listed buildings Extension Loft or dormer 122 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

  • 26/05984/FULL Decided

    41 Sutherland Street London SW1V 4JX

    Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

    Received 2 Sep, published by the council 11 Sep 2026 Full applications
  • 26/06134/FULL Decided

    Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

    Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

    Received 8 Sep, published by the council 15 Sep 2026 Full applications
  • 26/07258/FULL Awaiting decision

    16A Croxley Road London W9 3HL

    Installation of air to air heat pumps to offices and bedrooms.

    Received 22 Oct, published by the council 23 Oct 2026 Full applications
  • 26/07193/FULL Awaiting decision

    98 Victoria Street London SW1E 5JL

    Shopfront alterations. (Linked with 26/07194/ADV)

    Received 21 Oct, published by the council 22 Oct 2026 Full applications
  • 26/07187/FULL Awaiting decision

    Ground Floor Flat 151 Portnall Road London W9 3BN

    Erection of a single storey rear extension.

    Received 21 Oct, published by the council 22 Oct 2026 Full applications