5 Derby Street London W1J 7AB

This site has had 2 applications since 2025.

• 25/07469/LBC Awaiting decision

  5 Derby Street London W1J 7AB

  Demolition of rear closet wing extension and erection of replacement extension from ground to third floor level, demolition of part of the existing roof structure and erection of a mansard roof extension at fourth floor level; excavation of pavement vaults to increase floor to ceiling heights; external alterations including the installation of replacement windows, railing and step coverings; removal of render and creation of an entrance porch; internal alterations throughout all in connection with the use of the building as four flats (Class C3). (Linked to 25/07468/FULL)

  Submitted 15 Oct 2025 Heritage and listed buildings

1. 15 Oct 2025

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 10 December 2025, 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 91 days over the applications it decided in the last year.

• 25/07469/LBC Awaiting decision

  5 Derby Street London W1J 7AB

  Demolition of rear closet wing extension and erection of replacement extension from ground to third floor level, demolition of part of the existing roof structure and erection of a mansard roof extension at fourth floor level; excavation of pavement vaults to increase floor to ceiling heights; external alterations including the installation of replacement windows, railing and step coverings; removal of render and creation of an entrance porch; internal alterations throughout all in connection with the use of the building as four flats (Class C3). (Linked to 25/07468/FULL)

  Submitted 15 Oct 2025 Heritage and listed buildings

1 later application on the register refers to this one:

• 25/07469/LBC Awaiting decision

  5 Derby Street London W1J 7AB

  Demolition of rear closet wing extension and erection of replacement extension from ground to third floor level, demolition of part of the existing roof structure and erection of a mansard roof extension at fourth floor level; excavation of pavement vaults to increase floor to ceiling heights; external alterations including the installation of replacement windows, railing and step coverings; removal of render and creation of an entrance porch; internal alterations throughout all in connection with the use of the building as four flats (Class C3). (Linked to 25/07468/FULL)

  Submitted 15 Oct 2025 Heritage and listed buildings

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 119 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.

• 5 Derby Street London W1J 7AB

  25/07469/LBC Submitted 15 Oct 2025 50 yards away

  90% historically approved · decision due ~10 Dec

  Demolition of rear closet wing extension and erection of replacement extension from ground to third floor level, demolition of part of the existing roof structure and erection of a mansard roof extension at fourth floor level; excavation of pavement vaults to increase floor to ceiling heights; external alterations including the installation of replacement windows, railing and step coverings; removal of render and creation of an entrance porch; internal alterations throughout all in connection with the use of the building as four flats (Class C3). (Linked to 25/07468/FULL)

  Awaiting decision Heritage and listed buildings New dwelling Extension +3 58 docs
  Several homes

• 20 Stanhope Row London W1J 7BT

  26/02235/ADFULL Submitted 2 Apr 2026 50 yards away

  88% historically approved · decision due ~28 May

  Detailed samples of the facing materials you will use, including glazing, and elevations and roof plans annotated to show where the materials are to be located, the proposed windows/doors and proposed railings pursuant to conditions 4 and 5 of planning permission dated 20th February 2025 (RN:24/07198).

  Awaiting decision Full applications Windows or glazing 11 docs

• Curzon House 21 - 23 Curzon Street London W1J 7TE

  26/00938/ADLBC Submitted 13 Feb 2026 50 yards away

  89% historically approved · decision due ~10 Apr

  Details of approval of two additional samples of the brick cleaning pursuant to condition 3 of listed building dated 15th July 2025 (RN:25/03459/LBC)

  Awaiting decision Conditions 17 docs

• Development Site At 2-6 Stanhope Row, 16 Stanhope Row, 36-37 Hertford St And 16A, 16B And 17 Market Mews London

  25/04355/ADFULL Submitted 25 Jun 2025 50 yards away

  Details of a biodiversity management plan pursuant to Condition 42 of planning permission dated 31 October 2025 (RN: 24/05472/FULL)

  Granted Full applications 10 docs

• 19 Curzon Street London W1J 7TB

  03/08734/FULL Submitted 13 Nov 2003 50 yards away

  Installation of three satellite dishes at roof level.

  Granted Full applications 8 docs

• 19 Curzon Street London W1J 7TB

  03/08735/LBC Submitted 13 Nov 2003 50 yards away

  Installation of three satellite dishes at roof level.

  Granted Heritage and listed buildings 2 docs

• 26/06234/FULL Decided

  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))

  Received 11 Sep, published by the council 18 Sep 2026 Full applications
• 26/06015/FULL Decided

  129 Saltram Crescent London W9 3JT

  Erection of a two-storey rear extension.

  Received 3 Sep, published by the council 11 Sep 2026 Full applications
• 26/07382/FULL Awaiting decision

  90 Gloucester Place London W1U 6HS

  Use of the building as an embassy (sui generis)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07363/FULL Awaiting decision

  36 Kilravock Street London W10 4HX

  Demolition of existing rear/side extension and construction of a new extension together with new glazing and doors, and changing the existing rooflights to the rear roof slope with new rooflights.

  Received 28 Oct, published by the council 2 Nov 2026 Full applications
• 26/07371/FULL Awaiting decision

  8A Randolph Road London W9 1AN

  Amalgamation of two residential units with internal refurbishment and reconfiguration. (Linked with 26/07372/LBC)

  Received 28 Oct, published by the council 2 Nov 2026 Full applications