12C Warrington Crescent London W9 1EL

This site has had 4 applications since 2025: 3 approved, 1 refused.

• 25/07986/LBC Granted

  12C Warrington Crescent London W9 1EL

  Replacement of front facade window glazing within existing timber frames with slim line double-glazing (installing new putty). Internal alterations including demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; and introduction of fire stopping measures to the doors, walls, ceilings. (Linked with 25/07985/FULL)

  Decided 12 Feb 2026 Heritage and listed buildings
• 25/05672/LBC Refused

  12C Warrington Crescent London W9 1EL

  Demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; demolition and reinstatement of existing decorative features, such as timber and plaster mouldings; using the existing timber frames of the external doors and windows, replace the single glazing with slim line double-glazing; introduce, currently absent, fire stopping measures to the doors, walls, ceilings and floor; and introduction of a small brick vent in the rear facade to allow for mechanical ventilation of the bathroom. (Linked with 25/05671/FULL)

  Decided 7 Oct 2025 Heritage and listed buildings
• 25/05671/FULL Granted

  12C Warrington Crescent London W9 1EL

  Replace the single glazing with slim line double-glazing; and introduction of a small brick vent in the rear facade to allow for mechanical ventilation of the bathroom. (Linked with 25/05672/LBC)

  Decided 7 Oct 2025 Full applications

1. 4 Nov 2025

   Received by Westminster

2. 6 Nov 2025

   Validated

   Checked as complete and ready for consideration.

3. 12 Feb 2026

   Decision issued: Application Permitted

4. 21 Jul 2026

   Added to PlanIndex

• 25/07986/LBC Granted

  12C Warrington Crescent London W9 1EL

  Replacement of front facade window glazing within existing timber frames with slim line double-glazing (installing new putty). Internal alterations including demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; and introduction of fire stopping measures to the doors, walls, ceilings. (Linked with 25/07985/FULL)

  Decided 12 Feb 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 25/07986/LBC Granted

  12C Warrington Crescent London W9 1EL

  Replacement of front facade window glazing within existing timber frames with slim line double-glazing (installing new putty). Internal alterations including demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; and introduction of fire stopping measures to the doors, walls, ceilings. (Linked with 25/07985/FULL)

  Decided 12 Feb 2026 Heritage and listed buildings

Westminster granted permission on 12 February 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.

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.

• 12C Warrington Crescent London W9 1EL

  25/07986/LBC Submitted 4 Nov 2025 50 yards away

  Replacement of front facade window glazing within existing timber frames with slim line double-glazing (installing new putty). Internal alterations including demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; and introduction of fire stopping measures to the doors, walls, ceilings. (Linked with 25/07985/FULL)

  Granted Heritage and listed buildings Demolition Windows or glazing 22 docs

• 12A Warrington Crescent London W9 1EL

  25/06006/LBC Submitted 22 Aug 2025 50 yards away

  Replacement of two front lightwell windows with matching double-glazed sash windows made of white painted timber. (Linked with 25/06005/FULL)

  Granted Heritage and listed buildings Windows or glazing 20 docs

• 12A Warrington Crescent London W9 1EL

  25/06005/FULL Submitted 22 Aug 2025 50 yards away

  Replacement of two front lightwell windows with matching double-glazed sash windows made of white painted timber. (Linked with 25/06006/LBC)

  Granted Full applications Windows or glazing 23 docs

• 12C Warrington Crescent London W9 1EL

  25/05672/LBC Submitted 13 Aug 2025 50 yards away

  Demolition and reconfiguration of internal partitions; demolition and reconfiguration of internal stair connecting to mezzanine; demolition and reconfiguration of Mezzanine; demolition of existing joinery and fittings; demolition and reinstatement of existing decorative features, such as timber and plaster mouldings; using the existing timber frames of the external doors and windows, replace the single glazing with slim line double-glazing; introduce, currently absent, fire stopping measures to the doors, walls, ceilings and floor; and introduction of a small brick vent in the rear facade to allow for mechanical ventilation of the bathroom. (Linked with 25/05671/FULL)

  Refused Heritage and listed buildings Demolition Windows or glazing 24 docs

• 12C Warrington Crescent London W9 1EL

  25/05671/FULL Submitted 13 Aug 2025 50 yards away

  Replace the single glazing with slim line double-glazing; and introduction of a small brick vent in the rear facade to allow for mechanical ventilation of the bathroom. (Linked with 25/05672/LBC)

  Granted Full applications Windows or glazing 21 docs

• 12A Warrington Crescent London W9 1EL

  25/05997/LBC Submitted 22 Aug 2025 50 yards away

  Replacement of two rear elevation windows and doors. Internal works to include waterproofing on all walls up to 1.2m, the removal of all flooring including screed, repair failed waterproofing, reinstate floor with acoustic treatment (to isolate noise from underground trains), underfloor heating and then to reinstate existing skirting; replacement of all joinery will be replaced, works to lighting. (Linked to 25/05996/FULL)

  Granted Heritage and listed buildings Windows or glazing 21 docs

• 26/06015/FULL Decided

  129 Saltram Crescent London W9 3JT

  Erection of a two-storey rear extension.

  Received 3 Sep, published by the council 11 Sep 2026 Full applications
• 26/05689/FULL Decided

  Flat 1 12 Bristol Gardens London W9 2JG

  Demolition of an existing conservatory at the rear at lower ground level and erection of single storey rear extension.

  Received 19 Aug, published by the council 14 Sep 2026 Full applications
• 26/07340/FULL Awaiting decision

  123 Victoria Street London SW1E 6DE

  Installation of a single-leaf glazed entrance door at ground level to the Victoria Street frontage

  Received 27 Oct, published by the council 30 Oct 2026 Full applications
• 26/07315/FULL Awaiting decision

  30 Inverness Terrace London W2 3JA

  Relocation of air conditioning units throughout to the lower ground floor lightwells within aluminium enclosure; replacement of all pipes with cast iron pipes; alteration to balconies including replacement of UPVC door with original door arrangement and replacement railing; reopening of previously infilled windows; replacement marble tiles at hallway of No.32 with Victorian floor tiles; replacement of all doors facing the communal staircase with the correct period style doors; removal of red clay tile leanto roof at first floor rear and the roof made good; removal of link bridges to the rear of the second floor and the rear of the third floor; and reopening of previously infilled windows to the stairs lobby at ground, first and second floor to No.30. (Linked with 26/07316/LBC)

  Received 26 Oct, published by the council 27 Oct 2026 Full applications
• 26/05708/FULL Decided

  Flat 23 Imperial Court 55 - 56 Prince Albert Road London NW8 7PT

  Replacement of existing windows and louvres.

  Received 20 Aug, published by the council 18 Sep 2026 Full applications