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

This site has had 5 applications since 2005: 2 approved, 2 refused.

• 26/04985/FULL Awaiting decision

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

  Replacement of entrance door.

  Submitted 24 Jul 2026 Full applications
• 26/00984/NMA Granted

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

  Amendments to planning permission dated 12th November 2024 (RN: 24/06018/FULL) for Alterations to the entrance at ground floor level and installation of plant with screening and associated equipment at roof level. Namely, omission of previously approved GRP housing at roof level, relocation of 1no 175mm x 450mm louvre integrated into the head of existing WC window; and introduction of 6no 500mmx500mm ventilation louvres to south west elevation.

  Decided 15 Apr 2026 Amendments
• 07/05158/FULL Refused

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

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

  Decided 14 Sep 2007 Full applications
• 06/01678/FULL Refused

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

  Retention of four air conditioning condenser units on rear first floor flat roof.

  Decided 11 Sep 2006 Full applications

1. 21 Feb 2005

   Received by Westminster

2. 15 Mar 2005

   Validated

   Checked as complete and ready for consideration.

3. 9 May 2005

   Decision issued: Application Permitted

4. 30 Aug 2026

   Added to PlanIndex

Westminster granted permission on 9 May 2005, 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.

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

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

  07/05158/FULL Submitted 12 Jun 2007 0m away

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

  Refused Full applications 12 docs

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

  06/01678/FULL Submitted 6 Mar 2006 0m away

  Retention of four air conditioning condenser units on rear first floor flat roof.

  Refused Full applications 7 docs

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

  26/04985/FULL Submitted 24 Jul 2026 0m away

  87% historically approved · decision due ~18 Sep

  Replacement of entrance door.

  Awaiting decision Full applications

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

  26/00984/NMA Submitted 17 Feb 2026 4m away

  Amendments to planning permission dated 12th November 2024 (RN: 24/06018/FULL) for Alterations to the entrance at ground floor level and installation of plant with screening and associated equipment at roof level. Namely, omission of previously approved GRP housing at roof level, relocation of 1no 175mm x 450mm louvre integrated into the head of existing WC window; and introduction of 6no 500mmx500mm ventilation louvres to south west elevation.

  Granted Amendments Windows or glazing 14 docs

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

  26/01148/FULL Submitted 24 Feb 2026 4m 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

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

  25/04301/FULL Submitted 24 Jun 2025 12m 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

• 26/05871/CLEUD Awaiting decision

  32 Cambridge Street London SW1V 4QH

  Confirmation of the lawful implementation of planning permission dated 13 August 2021 (RN: 21/04143/FULL) has commenced before the expiry of the three year time period and may, therefore, lawfully be carried out and completed.

  27 Aug 2026 Lawful development
• 26/05816/CLOPUD Awaiting decision

  124 - 126 Wardour Street London W1F 0TY

  Use of flats 1, 2 and 4 as three single dwellinghouses (Class C3).

  25 Aug 2026 Lawful development
• 26/05786/CLOPUD Awaiting decision

  6 Grosvenor Street London W1K 4DJ

  Confirmation that the planning permission dated 31 July 2024 (RN: 23/08374/FULL) for the: Refurbishment and extension of existing Class E building to include the extension of the fifth floor, partial demolition and reconstruction of the sixth floor, erection of a new seventh floor with external terrace, alterations to the Avery Row and Grosvenor Street elevations to include new shopfronts, entrances and replacement windows, installation of green roof and photovoltaic panels at main roof level and installation of screened plant at seventh floor level. (SITE INCLUDES 4 GROSVENOR STREET), was lawfully implemented prior to the expiration date and that it is lawful to complete the outstanding works.

  24 Aug 2026 Lawful development
• 26/05724/CLEUD Awaiting decision

  The Sky Bar Trocadero 13 Coventry Street London W1D 7DH

  Confirmation of the lawful implementation of planning permission dated 31 August 2023 (RN: 22/06174/FULL) has commenced before the expiry of the three year time period and may, therefore, lawfully be carried out and completed.

  20 Aug 2026 Lawful development
• 26/05560/CLOPUD Awaiting decision

  3 Northumberland Place London W2 5BS

  Painting of the front facade of the building.

  14 Aug 2026 Lawful development