26 Upper Montagu Street London W1H 1RP

This site has had 3 applications since 2025.

• 26/03214/FULL Awaiting decision

  26 Upper Montagu Street London W1H 1RP

  Erection of a one and a half storey rear extension tp enlarge HMO, installation of replacement windows and installation of balcony railings.

  Submitted 15 May 2026 Full applications
• 25/08746/FULL Awaiting decision

  26 Upper Montagu Street London W1H 1RP

  Erection of a two storey rear extension and internal reconfiguration of HMO.

  Submitted 1 Dec 2025 Full applications

1. 12 Oct 2026

   Received by Westminster

2. 15 Oct 2026

   Validated

   Checked as complete and ready for consideration.

3. 19 Oct 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 10 December 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 86 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 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.

• 40 Upper Montagu Street London W1H 1RP

  09/07665/LBC Submitted 23 Sep 2009 50 yards away

  Alterations to front elevation and internal works at ground floor level.

  Granted Heritage and listed buildings 2 docs

• 45 York Street London W1H 1PW

  25/09312/LBC Submitted 23 Dec 2025 50 yards away

  Installation of cavity membrane system to the walls and soffit of the vault.

  Granted Heritage and listed buildings 12 docs

• 26 Upper Montagu Street London W1H 1RP

  26/03214/FULL Submitted 15 May 2026 50 yards away

  88% historically approved · decision due ~10 Jul

  Erection of a one and a half storey rear extension tp enlarge HMO, installation of replacement windows and installation of balcony railings.

  Awaiting decision Full applications Extension Windows or glazing 12 docs

• 26 Upper Montagu Street London W1H 1RP

  25/08746/FULL Submitted 1 Dec 2025 50 yards away

  88% historically approved · decision due ~26 Jan

  Erection of a two storey rear extension and internal reconfiguration of HMO.

  Awaiting decision Full applications Extension 18 docs

• 5 - 7 Durweston Street London W1H 1PH

  07/03448/ADFULL Submitted 19 Apr 2007 50 yards away

  Details of waste and recyclable store pursuant to Condition 4 of planning permission dated 6 October 1006 (RN: 06/04302).

  Refused Full applications 3 docs

• 5 - 7 Durweston Street London W1H 1PH

  07/05759/ADFULL Submitted 2 Jul 2007 50 yards away

  Details of waste storage pursuant to Condition 4 of planning permission dated 6 October 2006 (RN: 06/04302).

  Granted Full applications 2 docs

• 26/05984/FULL Decided

  41 Sutherland Street London SW1V 4JX

  Replacement of front, side and rear windows with double glazed timber framed sash windows and replacement of a door with a double glazed timber framed door.

  Received 2 Sep, published by the council 11 Sep 2026 Full applications
• 26/06134/FULL Decided

  Flat 10H Hyde Park Mansions Cabbell Street London NW1 5BG

  Replacement of front and rear second floor level windows with slim-profile double-glazed panels, retaining the existing window and door frames.

  Received 8 Sep, published by the council 15 Sep 2026 Full applications
• 26/07258/FULL Awaiting decision

  16A Croxley Road London W9 3HL

  Installation of air to air heat pumps to offices and bedrooms.

  Received 22 Oct, published by the council 23 Oct 2026 Full applications
• 26/07193/FULL Awaiting decision

  98 Victoria Street London SW1E 5JL

  Shopfront alterations. (Linked with 26/07194/ADV)

  Received 21 Oct, published by the council 22 Oct 2026 Full applications
• 26/07187/FULL Awaiting decision

  Ground Floor Flat 151 Portnall Road London W9 3BN

  Erection of a single storey rear extension.

  Received 21 Oct, published by the council 22 Oct 2026 Full applications