Flat 45 2 Mansfield Street London W1G 9NF

This site has had 2 applications since 2026.

• 26/02044/FULL Awaiting decision

  Flat 45 2 Mansfield Street London W1G 9NF

  Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)

  Submitted 27 Mar 2026 Full applications

1. 27 Mar 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 22 May 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.

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 45 2 Mansfield Street London W1G 9NF

  26/02044/FULL Submitted 27 Mar 2026 50 yards away

  87% historically approved · decision due ~22 May

  Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)

  Awaiting decision Full applications Extension Loft or dormer +1 12 docs

• Flat 16 2 Mansfield Street London W1G 9NF

  22/01316/LBC Submitted 24 Feb 2022 50 yards away

  Replacement windows and door to the rear elevation.

  Granted Heritage and listed buildings Windows or glazing 12 docs

• Flat 43 2 Mansfield Street London W1G 9NF

  26/00589/FULL Submitted 2 Feb 2026 50 yards away

  87% historically approved · decision due ~12 May

  Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00590/LBC)

  Awaiting decision Full applications 22 docs

• Flat 43 2 Mansfield Street London W1G 9NF

  26/00590/LBC Submitted 2 Feb 2026 50 yards away

  90% historically approved · decision due ~12 May

  Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00589/FULL)

  Awaiting decision Heritage and listed buildings 2 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

• 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

• 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