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Planning application

First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

Granted Westminster 25/09171/LBC Listed Building Consent Application

Works: Windows or glazing

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

Proposal

Internal reconfiguration of Flat B, including new fittings, fixtures, services, and finishes throughout; alterations to staircase landings with replacement balustrades and handrails; installation of new timber-framed slimline double-glazed sash windows in place of modern units; retention of historic window frames with replacement slimline double-glazing; minor internal layout adjustments, including relocation of the powder room and removal of the secondary lift; replacement of modern doors with raised-height openings; installation of new fireplaces in the Drawing Room and Principal Bedroom; introduction of underfloor heating throughout; together with associated internal and external works.

As published by the council, reference 25/09171/LBC

Application record

Reference
25/09171/LBC
Type
Listed Building Consent Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
18 Dec 2025
Validated
18 Dec 2025
Decided
2 Apr 2026
Ward
Knightsbridge & Belgravia
Decision by
Delegated Decision
Postcode
SW1W 9AG

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2025: 1 approved, 0 refused.

  • 26/06043/ADFULL Decided

    First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    Details of the new French doors pursuant to condition 4 of planning permission dated 2nd April 2026 (26/00883/FULL)

    Submitted 3 Sep 2026
  • 26/05999/ADLBC Decided

    First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    Details of new French doors showing traditional joinery pursuant to condition 4 of Listed Building Consent dated 2 April 2026 (25/09171/LBC)

    Submitted 2 Sep 2026
  • 26/00883/FULL Awaiting decision

    First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    Installation of new timber framed slimline double glazed sash windows in place of modern units; and retention of historic window frames with replacement slimline double glazing. (Linked to 25/09171/LBC)

    Submitted 12 Feb 2026 Full applications

Timeline

Dates from the published record

  1. 18 Dec 2025

    Received by Westminster

  2. 2 Apr 2026

    Decision issued: Application Permitted

  3. 20 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

2 later applications on the register refer to this one:

  • 26/05999/ADLBC Decided

    First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    Details of new French doors showing traditional joinery pursuant to condition 4 of Listed Building Consent dated 2 April 2026 (25/09171/LBC)

    Submitted 2 Sep 2026
  • 26/00883/FULL Awaiting decision

    First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    Installation of new timber framed slimline double glazed sash windows in place of modern units; and retention of historic window frames with replacement slimline double glazing. (Linked to 25/09171/LBC)

    Submitted 12 Feb 2026 Full applications

Who's behind it

Company information only, from the register and Companies House

Newmark LLP Agent

927 applications on PlanIndex · across 40 councils · 97% granted

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Documents

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

70 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 2 April 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

  • Flat D 86 Eaton Square London SW1W 9AG

    25/08586/FULL Submitted 24 Nov 2025 50 yards away

    Subdivision of single flat into three flats and installation of rooftop AC condenser.

    Granted Full applications New dwelling 40 docs
    Several homes

  • Flat D 86 Eaton Square London SW1W 9AG

    25/08587/LBC Submitted 24 Nov 2025 50 yards away

    Subdivision of single flat into three flats and installation of rooftop AC condenser.

    Granted Heritage and listed buildings New dwelling 33 docs
    Several homes

  • First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    26/00883/FULL Submitted 12 Feb 2026 50 yards away

    88% historically approved · decision due ~9 Apr

    Installation of new timber framed slimline double glazed sash windows in place of modern units; and retention of historic window frames with replacement slimline double glazing. (Linked to 25/09171/LBC)

    Awaiting decision Full applications Windows or glazing 24 docs

  • 85 - 88 Eaton Square London SW1W 9AG

    26/06718/TCA Submitted 1 Oct 2026 50 yards away

    100% historically approved · decision due ~26 Nov

    T1 - Silver birch - prune away from building to allow 1.5 m clearance for the erection of scaffolding T2 - Magnolia - prune away from building to allow 1.5 m clearance for the erection of scaffolding

    Decided Trees

  • Flat D 86 Eaton Square London SW1W 9AG

    26/04271/ADFULL Submitted 29 Jun 2026 50 yards away

    89% historically approved · decision due ~24 Aug

    Details of residential parking mitigation measures pursuant to condition 8 of planning permission dated 22 May 2026 (RN: 25/08586/FULL).

    Decided 4 docs

  • First Floor And Second Floor Flat 84 Eaton Square London SW1W 9AG

    26/06043/ADFULL Submitted 3 Sep 2026 50 yards away

    89% historically approved · decision due ~29 Oct

    Details of the new French doors pursuant to condition 4 of planning permission dated 2nd April 2026 (26/00883/FULL)

    Decided Windows or glazing

In Westminster

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    29 Oct 2026 Heritage and listed buildings
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    Received 28 Oct, published by the council 2 Nov 2026 Heritage and listed buildings
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    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings
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    Received 27 Oct, published by the council 30 Oct 2026 Heritage and listed buildings