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 Decided

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

  Alterations to entrance including installation of new entrance doors.

  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 50 yards 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 50 yards 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 50 yards away

  88% historically approved · decision due ~18 Sep

  Alterations to entrance including installation of new entrance doors.

  Decided Full applications

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

  26/00984/NMA Submitted 17 Feb 2026 50 yards 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 50 yards 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 50 yards 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

• 26/07221/CLEUD Awaiting decision

  Ground Floor Flat A 31 Fermoy Road London W9 3NH

  Confirmation of the lawful existing Use of Unit A, 31 Fermoy Road as a 4-bedroom HMO (Class C4).

  Received 21 Oct, published by the council 23 Oct 2026 Lawful development
• 26/07134/CLEUD Awaiting decision

  5A Motcomb Street London SW1X 8JU

  Confirmation of the planning consent 24/06560/FULL was lawfully implemented within the 3 year time limit period and as such the remainder of the works can be lawfully implemented.

  Received 16 Oct, published by the council 21 Oct 2026 Lawful development
• 26/06979/CLOPUD Awaiting decision

  15 Bridgewater House Hallfield Estate London W2 6EE

  Use as a private hire chauffeur business (administrative and booking management activities of AGR Chauffeurs Limited).

  Received 13 Oct, published by the council 18 Oct 2026 Lawful development
• 26/06991/CLOPUD Awaiting decision

  11 Grittleton Road London W9 2DD

  Installation of an external spiral staircase connecting these existing levels (the ground level terrace to the lower-ground level garden).

  Received 13 Oct, published by the council 15 Oct 2026 Lawful development
• 26/06932/CLOPUD Awaiting decision

  157 Oliphant Street London W10 4EA

  Installation of solar panels.

  Received 12 Oct, published by the council 13 Oct 2026 Lawful development