20 Air Street London W1B 5AN

This site has had 5 applications since 2026: 3 approved, 0 refused.

• 26/06387/LBC Awaiting decision

  20 Air Street London W1B 5AN

  Installation of a ventilation louvre within an existing third-floor window opening and associated mechanical ventilation equipment; internal alterations to reconfigure the Level 3 lounge, including new partitions, bar fit-out and associated building services. (Linked with 26/06386/FULL)

  Submitted 17 Sep 2026 Heritage and listed buildings
• 26/00274/LBC Granted

  20 Air Street London W1B 5AN

  Installation of two rooftop condenser units.

  Decided 17 Apr 2026 Heritage and listed buildings
• 26/00273/FULL Granted

  20 Air Street London W1B 5AN

  Installation of two rooftop condenser units.

  Decided 17 Apr 2026 Full applications
• 26/00013/FULL Granted

  20 Air Street London W1B 5AN

  Installation of new plant on the main roof of the building.

  Decided 10 Apr 2026 Full applications

1. 17 Sep 2026

   Received by Westminster

2. 25 Sep 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 12 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.

• 26/06387/LBC Awaiting decision

  20 Air Street London W1B 5AN

  Installation of a ventilation louvre within an existing third-floor window opening and associated mechanical ventilation equipment; internal alterations to reconfigure the Level 3 lounge, including new partitions, bar fit-out and associated building services. (Linked with 26/06386/FULL)

  Submitted 17 Sep 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/06387/LBC Awaiting decision

  20 Air Street London W1B 5AN

  Installation of a ventilation louvre within an existing third-floor window opening and associated mechanical ventilation equipment; internal alterations to reconfigure the Level 3 lounge, including new partitions, bar fit-out and associated building services. (Linked with 26/06386/FULL)

  Submitted 17 Sep 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.

• 20 Air Street London W1B 5AN

  26/06387/LBC Submitted 17 Sep 2026 50 yards away

  90% historically approved · decision due ~20 Nov

  Installation of a ventilation louvre within an existing third-floor window opening and associated mechanical ventilation equipment; internal alterations to reconfigure the Level 3 lounge, including new partitions, bar fit-out and associated building services. (Linked with 26/06386/FULL)

  Awaiting decision Heritage and listed buildings Windows or glazing

• 20 Air Street London W1B 5AN

  26/00274/LBC Submitted 19 Jan 2026 50 yards away

  Installation of two rooftop condenser units.

  Granted Heritage and listed buildings 19 docs

• First Floor 17 Air Street London W1B 5AF

  26/06722/AD7 Submitted 1 Oct 2026 50 yards away

  89% historically approved · decision due ~26 Nov

  Display for a temporary period of six months of a non-illuminated 'to let' board located on the face of the building at a height of between 3m and 4.6m above pavement level and measuring 1.2m x 0.9m.

  Decided

• Ground Floor 17 Air Street London W1B 5AF

  26/05138/FULL Submitted 30 Jul 2026 50 yards away

  88% historically approved · decision due ~30 Sep

  Installation of a new inward-opening painted timber-framed glazed entrance door within the existing ground-floor shopfront.

  Decided Full applications Windows or glazing

• Ground Floor 17 Air Street London W1B 5AF

  26/04977/ADV Submitted 24 Jul 2026 50 yards away

  82% historically approved · decision due ~29 Oct

  Display of externally illuminated projecting sign measuring 0.8m X 0.7m and externally illuminated fascia sign measuring 4.7m X 0.7m

  Withdrawn Advertising 10 docs

• 20 Air Street London W1B 5AN

  26/00013/FULL Submitted 5 Jan 2026 50 yards away

  Installation of new plant on the main roof of the building.

  Granted Full applications 23 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