Hallam House 56 - 60 Hallam Street London W1W 6JL

This site has had 4 applications since 2025: 1 approved, 0 refused.

• 26/01015/FULL Awaiting decision

  Hallam House 56 - 60 Hallam Street London W1W 6JL

  Change of use of existing building to form 6 residential flats (Class C3), alterations to rear fenestration pattern, erection of single storey lower ground floor extension within rear lightwell to provide additional residential floorspace (Class C3) and replacement of an existing window with a door at front ground floor level.

  Submitted 17 Feb 2026 Full applications
• 26/00825/ADFULL Awaiting decision

  Hallam House 56 - 60 Hallam Street London W1W 6JL

  Details of appropriate arrangements to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site pursuant to condition 4 of prior approval dated 11 March 2025 (RN: 25/00247/P3JPA).

  Submitted 11 Feb 2026 Full applications
• 25/04301/FULL Granted

  Hallam House 56 - 60 Hallam Street London W1W 6JL

  Demolition of existing roof plant room and erection of a single floor roof extension to provide one residential unit (Class C3). Erection of replacement plant room, and provision of an external terrace, landscaping and green roof. Alterations to rear fenestration pattern. Erection of single storey lower ground floor extension within rear lightwell to provide additional office floorspace (Class E) and replacement of a window with a door at front ground floor level.

  Decided 11 Nov 2025 Full applications

1. 11 Feb 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 8 April 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 65 days over the applications it decided in the last year.

• 25/04301/FULL Granted

  Hallam House 56 - 60 Hallam Street London W1W 6JL

  Demolition of existing roof plant room and erection of a single floor roof extension to provide one residential unit (Class C3). Erection of replacement plant room, and provision of an external terrace, landscaping and green roof. Alterations to rear fenestration pattern. Erection of single storey lower ground floor extension within rear lightwell to provide additional office floorspace (Class E) and replacement of a window with a door at front ground floor level.

  Decided 11 Nov 2025 Full applications

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 89 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.

• Hallam House 56 - 60 Hallam Street London W1W 6JL

  26/00825/ADFULL Submitted 11 Feb 2026 0m away

  87% historically approved · decision due ~8 Apr

  Details of appropriate arrangements to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site pursuant to condition 4 of prior approval dated 11 March 2025 (RN: 25/00247/P3JPA).

  Awaiting decision Full applications 5 docs

• Hallam House 56 - 60 Hallam Street London W1W 6JL

  26/01015/FULL Submitted 17 Feb 2026 3m away

  87% historically approved · decision due ~14 Apr

  Change of use of existing building to form 6 residential flats (Class C3), alterations to rear fenestration pattern, erection of single storey lower ground floor extension within rear lightwell to provide additional residential floorspace (Class C3) and replacement of an existing window with a door at front ground floor level.

  Awaiting decision Full applications New dwelling Extension +1 34 docs
  Small domestic

• Hallam House 56 - 60 Hallam Street London W1W 6JL

  25/04301/FULL Submitted 24 Jun 2025 4m away

  Demolition of existing roof plant room and erection of a single floor roof extension to provide one residential unit (Class C3). Erection of replacement plant room, and provision of an external terrace, landscaping and green roof. Alterations to rear fenestration pattern. Erection of single storey lower ground floor extension within rear lightwell to provide additional office floorspace (Class E) and replacement of a window with a door at front ground floor level.

  Granted Full applications Extension Roofing +2 124 docs
  Small domestic

• Basement And Ground Floor Northumberland House 155 - 157 Great Portland Street London W1W 6QP

  26/01148/FULL Submitted 24 Feb 2026 16m away

  Dual alternative use of the ground and basement floors as showroom (sui generis) or MRI medical centre (Class E)

  Granted Full applications 17 docs

• Northumberland House 155 - 157 Great Portland Street London W1W 6QP

  05/01357/CLEUD Submitted 21 Feb 2005 16m away

  Installation of two air conditioning units in rear lightwell.

  Granted Lawful development 5 docs

• Northumberland House 155-157 Great Portland Street London W1W 6QP

  07/05158/FULL Submitted 12 Jun 2007 16m away

  Relocation of air conditioning units onto the main roof within a new enclosure.

  Refused Full applications 12 docs

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  15 Sep 2026 Full applications
• 26/06297/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Alterations to rear elevation at basement level comprising repolacement window and installation of double opening door.

  15 Sep 2026 Full applications
• 26/06234/FULL Awaiting decision

  40 Grosvenor Place London SW1X 7HJ

  Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

  11 Sep 2026 Full applications
• 26/06249/FULL Awaiting decision

  53 Wimpole Street London W1G 8YH

  Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

  11 Sep 2026 Full applications
• 26/03576/FULL Decided

  15A Devonshire Terrace London W2 3DW

  Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

  1 Jun 2026 Full applications