25 Upper Montagu Street London W1H 1SA

This site has had 2 applications since 2025.

• 25/07358/FULL Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/08299/LBC)

  Submitted 10 Oct 2025 Full applications

1. 11 Nov 2025

   Received by Westminster

2. 20 Jul 2026

   Added to PlanIndex

3. 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 91 days over the applications it decided in the last year.

• 25/07358/FULL Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/08299/LBC)

  Submitted 10 Oct 2025 Full applications

1 later application on the register refers to this one:

• 25/07358/FULL Awaiting decision

  25 Upper Montagu Street London W1H 1SA

  Replacement of existing external staircase within front lightwell. (Linked to 25/08299/LBC)

  Submitted 10 Oct 2025 Full applications

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided heritage and listed building applications in a median of 119 days. More in our guide to how long planning decisions take.

Listed building consent is needed for works that affect the special interest of a listed building, and carrying out such works without it is a criminal offence. More in our guide to planning application types.

• 25 Upper Montagu Street London W1H 1SA

  25/07358/FULL Submitted 10 Oct 2025 50 yards away

  88% historically approved · decision due ~6 Jan

  Replacement of existing external staircase within front lightwell. (Linked to 25/08299/LBC)

  Awaiting decision Full applications 11 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

• 21 Upper Montagu Street London W1H 2PQ

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

  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)

  Granted Heritage and listed buildings Windows or glazing 18 docs

• 21 Upper Montagu Street London W1H 2PQ

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

  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)

  Granted Full applications Windows or glazing 12 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

• 26/07529/LBC Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water supply pipe on rear courtyard elevation. (Linked with 26/07528/FULL)

  Received 5 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07509/LBC Awaiting decision

  Buckingham Palace The Mall London SW1A 1AA

  Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07508/FULL)

  Received 4 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07473/LBC Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07472/FULL)

  Received 3 Nov, published by the council 6 Nov 2026 Heritage and listed buildings
• 26/07471/LBC Awaiting decision

  12 Queen Anne's Gate London SW1H 9AA

  Excavation of single-storey basement, internal reconfiguration and installation of modern services. (Linked with 26/07470/FULL)

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings
• 26/07461/LBC Awaiting decision

  1 Savile Row London W1S 3JR

  Minor internal works comprising redecoration and upgrades to lighting, flooring and bathroom and kitchen facilities, together with external works including new lighting and signage.

  Received 3 Nov, published by the council 5 Nov 2026 Heritage and listed buildings