Flat 10 2 Mansfield Street London W1G 9NF

This site has had 2 applications since 2026.

• 26/01151/FULL Awaiting decision

  Flat 10 2 Mansfield Street London W1G 9NF

  Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC

  Submitted 24 Feb 2026 Full applications

1. 24 Feb 2026

   Received by Westminster

2. 13 Apr 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 8 June 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 66 days over the applications it decided in the last year.

• 26/01151/FULL Awaiting decision

  Flat 10 2 Mansfield Street London W1G 9NF

  Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC

  Submitted 24 Feb 2026 Full applications

1 later application on the register refers to this one:

• 26/01151/FULL Awaiting decision

  Flat 10 2 Mansfield Street London W1G 9NF

  Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC

  Submitted 24 Feb 2026 Full applications

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 94 days. More in our guide to how long planning decisions take.

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.

• Flat 10 2 Mansfield Street London W1G 9NF

  26/01151/FULL Submitted 24 Feb 2026 50 yards away

  87% historically approved · decision due ~8 Jun

  Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01152/LBC

  Awaiting decision Full applications 17 docs

• 4 Queen Anne Street London W1G 9LQ

  25/07282/FULL Submitted 8 Oct 2025 50 yards away

  Variaiton of Conditon 1 of planning permission dated 18 November 2024 (RN: 24/05063/FULL) for, 'Installation of two air conditioning units at main roof level with associated pipework on the rear elevation, installation of two grilles on the rear wall in the lightwell at lower ground floor level and internal alterations at lower ground and ground floor levels'; Namely, to amend the location of the two items of plant on the roof in addition to amending the specification of the anti-vibration mounts. (Linked with 25/07252/LBC) (Application under Section 73 of the Act).

  Granted Full applications 26 docs

• 4 Queen Anne Street London W1G 9LQ

  25/07255/FULL Submitted 7 Oct 2025 50 yards away

  Variation of Condition 1 of planning permission dated 22nd November 2024 (RN: 24/05074/FULL) for, 'Installation of one air conditioning unit at main roof level and two grilles within the window in the rear lightwell at ground floor level with associated pipework and internal alterations'; Namely, to allow for repositioning of the plant unit on the roof in addition to providing new higher performance anti-vibration mounts. (Linked with 25/07251/LBC) (Application under Section 73 of the Act).

  Granted Full applications Windows or glazing 29 docs

• 4 Queen Anne Street London W1G 9LQ

  25/07251/LBC Submitted 7 Oct 2025 50 yards away

  Installation of one air conditioning unit at main roof level and two grilles within the window in the rear lightwell at ground floor level with associated pipework and internal alterations. (Linked with 25/07255/FULL)

  Granted Heritage and listed buildings Windows or glazing 24 docs

• Flat 49 2 Mansfield Street London W1G 9NF

  26/01207/LBC Submitted 25 Feb 2026 50 yards away

  90% historically approved · decision due ~29 Jul

  Replacement of seven windows.

  Awaiting decision Heritage and listed buildings Windows or glazing 15 docs

• 4 Queen Anne Street London W1G 9LQ

  25/07252/LBC Submitted 7 Oct 2025 50 yards away

  Installation of two air conditioning units at main roof level with associated pipework on the rear elevation, installation of two grilles on the rear wall in the lightwell at lower ground floor level and internal alterations at lower ground and ground floor levels. (Linked with 25/07282/FULL)

  Granted Heritage and listed buildings 22 docs

• 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