20 Air Street London W1B 5AN

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

• 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. 19 Jan 2026

   Received by Westminster

2. 11 Feb 2026

   Validated

   Checked as complete and ready for consideration.

3. 17 Apr 2026

   Decision issued: Application Permitted

4. 21 Jul 2026

   Added to PlanIndex

Westminster granted permission on 17 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.

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.

• Ground Floor 17 Air Street London W1B 5AF

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

  87% historically approved · decision due ~30 Sep

  Installation of a new entrance door within the existing shopfront at ground floor level; a new door opening within the existing glazed shopfront and fitting a single, inward-opening, painted timber framed glazed entrance door.

  Awaiting decision Full applications Windows or glazing

• Ground Floor 17 Air Street London W1B 5AF

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

  84% 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  Withdrawn Advertising 10 docs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

• First Floor To Third Floor 1 Lower John Street London W1F 9DT

  25/05957/FULL Submitted 21 Aug 2025 50 yards away

  Variation of condition 1 of planning permission dated 14th May 2025 (RN:24/08966/FULL) for the Erection of new mansard roof extension to building in connection with change of use of upper levels from restaurant (Use Class E(b)) to 2x1-bed flats and 1x2-bed maisonette (Use Class C3). Alterations to facade including replacement of single glazed windows with timber-framed slimline double-glazed windows at 1 Lower John Street. Increase height of chimney stack to boundary shared with 1 Lower John Street at 2 Lower John Street. Namely, amendments to the elevations to include air bricks and to retain the single soil vent to facilitate internal services arrangements (Application under section 73 of the Act)

  Granted Full applications New dwelling Extension +2 13 docs

• 1 Lower John Street London W1F 9DT

  25/05899/ADV Submitted 20 Aug 2025 50 yards away

  Display of a non illuminated scaffold shroud of a 1:1 replica facade measuring 15.50m height x 23.03m length across both Lower John Street and Brewer Street with a non-illuminated advertisement panel measuring 3.7m x 10.4m for a temporary period of six months.

  Refused Advertising 16 docs

• The Glass Blower 42 Glasshouse Street London W1B 5DW

  26/03426/ADV Submitted 26 May 2026 50 yards away

  84% historically approved · decision due ~21 Jul

  Display of two externally illuminated hanging signs each measuring 1.20m x 0.90; two internally illuminated menu cases each measuring 0.50m x 0.38m; two house name letters each measuring 1.80m x 0.56m; two door plaque each measuring 0.25m x 0.25m; two sets of sign written letters each measuring 0.78m x 0.10m; 1x set of individual house number measuring 0.76m x 0.10m; two amenity boards each measuring 1.00m x 0.60m; and two chalkboards each measuring 1.00m x 0.60m.

  Awaiting decision Advertising 4 docs
  Several homes

• 26/04878/LBC Decided

  34 Grosvenor Street London W1K 4QU

  Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

  Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
• 26/06299/LBC Awaiting decision

  Apartment 33 24 Park Crescent London W1B 1AA

  Alterations to internal partitions, door openings, doors and floor finishes.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06305/LBC Awaiting decision

  33A Dean Street London W1D 4PP

  Installation of new concrete slab with drainage channels at basement level and new fire surround in B.01.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06318/LBC Awaiting decision

  124 Hamilton Terrace London NW8 9UT

  Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06317/FULL)

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/04141/LBC Decided

  80E Randolph Avenue London W9 1BG

  Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

  Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings