25 Upper Montagu Street London W1H 1SA

This site has had 2 applications since 2025.

• 25/08299/LBC Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/07358/FULL)

  Submitted 11 Nov 2025 Heritage and listed buildings

1. 10 Oct 2025

   Received by Westminster

2. 11 Nov 2025

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 6 January 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 66 days over the applications it decided in the last year.

• 25/08299/LBC Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/07358/FULL)

  Submitted 11 Nov 2025 Heritage and listed buildings

1 later application on the register refers to this one:

• 25/08299/LBC Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/07358/FULL)

  Submitted 11 Nov 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 91 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.

• 25 Upper Montagu Street London W1H 1SA

  25/08299/LBC Submitted 11 Nov 2025 50 yards away

  90% historically approved · decision due ~6 Jan

  Replacement of existing external staircase within front lightwell. (Linked to 25/07358/FULL)

  Awaiting decision Heritage and listed buildings 3 docs

• 26 Upper Montagu Street London W1H 1RP

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

  87% 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

  87% 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

• 21 Upper Montagu Street London W1H 2PQ

  25/08056/LBC Submitted 5 Nov 2025 50 yards away

  90% historically approved · decision due ~31 Dec

  Replacement of existing non-original single-glazed timber sash windows with new slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08055/FULL)

  Awaiting decision Heritage and listed buildings Windows or glazing 16 docs

• 21 Upper Montagu Street London W1H 2PQ

  25/08055/FULL Submitted 5 Nov 2025 50 yards away

  87% historically approved · decision due ~31 Dec

  Replacement of single-glazed timber sash windows with slimline double-glazed timber sash windows to match the original in appearance, detailing and materials. (Linked to 25/08056/LBC)

  Awaiting decision Full applications Windows or glazing 16 docs

• 21 Upper Montagu Street London W1H 2PQ

  25/06220/FULL Submitted 2 Sep 2025 50 yards away

  Careful dismantling and rebuilding of bowed flank elevation in matching/reused brickwork and replacement of existing timber joists to third floor. (Linked with 25/06221/LBC)

  Withdrawn Full applications 20 docs

• 26/06295/FULL Awaiting decision

  15 Warwick Way London SW1V 1QT

  Installation of a new shopfront.

  Received 15 Sep, published by the council 17 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.

  Received 15 Sep, published by the council 17 Sep 2026 Full applications
• 26/06287/FULL Awaiting decision

  Barness Court 6 - 8 Westbourne Terrace London W2 3UW

  Installation of a new riser as per GW10 design comprising a single riser with 7 entries and 9 Taylor valves to be installed. (Linked with 26/06288/LBC)

  Received 14 Sep, published by the council 21 Sep 2026 Full applications
• 26/06278/FULL Awaiting decision

  40 Wellington Road London NW8 9TJ

  Installation of a new external access ramp/slope to provide accessibility to the Barclays bank ATM.

  Received 14 Sep, published by the council 21 Sep 2026 Full applications
• 26/06269/FULL Awaiting decision

  Maisonette Basement And Ground Floor 101 Hereford Road London W2 5BB

  Amalgamation of existing lower ground and ground floor maisonette with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06270/LBC)

  Received 14 Sep, published by the council 21 Sep 2026 Full applications