Flat 1 109 Eaton Square London SW1W 9AA

This site has had 2 applications since 2026.

• 26/05891/LBC Awaiting decision

  Flat 1 109 Eaton Square London SW1W 9AA

  External and internal works, including replacement of existing vault doors with acoustic louvred doors associated with plant, replacement of existing security grilles to LGF front windows, demolition and rebuilding of existing closet wing infill extension at GF rear, replacement of external doors and windows and blocking up window opening to side of closet wing at GF level, opening up works for the purposes of investigation, demolition of and installation of partitions and suspended ceilings, replacement of internal doors, replacement of existing staircase, reinstatement and replacement of internal architectural features, installation of lighting, installation of new service routes associated with the plant and MEP and structural works. (Linked with 26/05890/FULL)

  Submitted 27 Aug 2026 Heritage and listed buildings

1. 27 Aug 2026

   Received by Westminster

2. 4 Sep 2026

   Added to PlanIndex

3. 24 Sep 2026

   Validated

   Checked as complete and ready for consideration.

4. Decision

   Awaiting decision

   Decision expected by 19 November 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 86 days over the applications it decided in the last year.

• 26/05891/LBC Awaiting decision

  Flat 1 109 Eaton Square London SW1W 9AA

  External and internal works, including replacement of existing vault doors with acoustic louvred doors associated with plant, replacement of existing security grilles to LGF front windows, demolition and rebuilding of existing closet wing infill extension at GF rear, replacement of external doors and windows and blocking up window opening to side of closet wing at GF level, opening up works for the purposes of investigation, demolition of and installation of partitions and suspended ceilings, replacement of internal doors, replacement of existing staircase, reinstatement and replacement of internal architectural features, installation of lighting, installation of new service routes associated with the plant and MEP and structural works. (Linked with 26/05890/FULL)

  Submitted 27 Aug 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/05891/LBC Awaiting decision

  Flat 1 109 Eaton Square London SW1W 9AA

  External and internal works, including replacement of existing vault doors with acoustic louvred doors associated with plant, replacement of existing security grilles to LGF front windows, demolition and rebuilding of existing closet wing infill extension at GF rear, replacement of external doors and windows and blocking up window opening to side of closet wing at GF level, opening up works for the purposes of investigation, demolition of and installation of partitions and suspended ceilings, replacement of internal doors, replacement of existing staircase, reinstatement and replacement of internal architectural features, installation of lighting, installation of new service routes associated with the plant and MEP and structural works. (Linked with 26/05890/FULL)

  Submitted 27 Aug 2026 Heritage and listed buildings

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.

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.

• 105 Eaton Square London SW1W 9AA

  26/06566/FULL Submitted 23 Sep 2026 50 yards away

  88% historically approved · decision due ~18 Nov

  Removal of brick pier between two garage openings and introduction of new fanlights on rear elevation (105 Eccleston Mews) (Linked to 26/06567/LBC)

  Awaiting decision Full applications

• 105 Eaton Square London SW1W 9AA

  26/06567/LBC Submitted 23 Sep 2026 50 yards away

  90% historically approved · decision due ~18 Nov

  Removal of brick pier between two garage openings and introduction of new fanlights on rear elevation (105 Eccleston Mews) (LInked to 26/06566/FULL)

  Awaiting decision Heritage and listed buildings

• Flat 1 109 Eaton Square London SW1W 9AA

  26/05891/LBC Submitted 27 Aug 2026 50 yards away

  90% historically approved · decision due ~19 Nov

  External and internal works, including replacement of existing vault doors with acoustic louvred doors associated with plant, replacement of existing security grilles to LGF front windows, demolition and rebuilding of existing closet wing infill extension at GF rear, replacement of external doors and windows and blocking up window opening to side of closet wing at GF level, opening up works for the purposes of investigation, demolition of and installation of partitions and suspended ceilings, replacement of internal doors, replacement of existing staircase, reinstatement and replacement of internal architectural features, installation of lighting, installation of new service routes associated with the plant and MEP and structural works. (Linked with 26/05890/FULL)

  Awaiting decision Heritage and listed buildings Extension Demolition +1 1 doc

• First Floor And Second Floor Maisonette 114 Eaton Square London SW1W 9AA

  26/04478/LBC Submitted 6 Jul 2026 50 yards away

  90% historically approved · decision due ~31 Aug

  Installation of a new tiled balcony finish using a reversible pedestal system and repair and redecoration of existing cast-iron railings.

  Decided Heritage and listed buildings 1 doc

• 113 Eaton Square London SW1W 9AA

  26/02444/NMA Submitted 14 Apr 2026 50 yards away

  93% historically approved · decision due ~9 Jun

  Amendments to planning permission dated 6th November 2025 (RN 25/06283/FULL) for the External alterations including infill of the rear lightwell at lower ground floor level, addition of rooflights, replacement windows and doors including replacing garage doors and use of the garage as habitable space at 113 Eccleston Mews. NAMELY, Front windows of mews house changed from casement to timber, double glazed sash windows.

  Awaiting decision Amendments Extension Loft or dormer +1 7 docs

• 113 Eaton Square London SW1W 9AA

  26/00076/ADFULL Submitted 7 Jan 2026 50 yards away

  Details confirming omission of rendered finish to front elevation, revised rear rooflight, revised window detail, rooflights showing relationship to finished roof pitch and external doors pursuant to condition 4 and 5 of planning permission dated 6th November 2025 (RN:25/06283/FULL).

  Granted Full applications Loft or dormer Windows or glazing 16 docs

• 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