Flat 1 8 Upper Montagu Street London W1H 2PB

This site has had 2 applications since 2026.

• 26/04890/LBC Awaiting decision

  Flat 1 8 Upper Montagu Street London W1H 2PB

  Replacement of existing windows with timber slimline double-glazed windows, including two bay windows, and replacement of lower ground floor French doors with a double-glazed casement window. (Linked with 26/04889/FULL)

  Submitted 21 Jul 2026 Heritage and listed buildings

1. 21 Jul 2026

   Received by Westminster

2. 29 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 15 September 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.

• 26/04890/LBC Awaiting decision

  Flat 1 8 Upper Montagu Street London W1H 2PB

  Replacement of existing windows with timber slimline double-glazed windows, including two bay windows, and replacement of lower ground floor French doors with a double-glazed casement window. (Linked with 26/04889/FULL)

  Submitted 21 Jul 2026 Heritage and listed buildings

1 later application on the register refers to this one:

• 26/04890/LBC Awaiting decision

  Flat 1 8 Upper Montagu Street London W1H 2PB

  Replacement of existing windows with timber slimline double-glazed windows, including two bay windows, and replacement of lower ground floor French doors with a double-glazed casement window. (Linked with 26/04889/FULL)

  Submitted 21 Jul 2026 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.

• Flat 1 8 Upper Montagu Street London W1H 2PB

  26/04890/LBC Submitted 21 Jul 2026 50 yards away

  90% historically approved · decision due ~15 Sep

  Replacement of existing windows with timber slimline double-glazed windows, including two bay windows, and replacement of lower ground floor French doors with a double-glazed casement window. (Linked with 26/04889/FULL)

  Awaiting decision Heritage and listed buildings Windows or glazing

• Flat 4 8 Upper Montagu Street London W1H 2PB

  26/06370/FULL Submitted 17 Sep 2026 50 yards away

  88% historically approved · decision due ~26 Nov

  Replacement of an existing timber single-glazed sash windows with a timber slimline double-glazed sash windows at third floor level. (Linked with 26/06369/LBC)

  Awaiting decision Full applications Windows or glazing

• Flat 4 8 Upper Montagu Street London W1H 2PB

  26/06369/LBC Submitted 17 Sep 2026 50 yards away

  90% historically approved · decision due ~26 Nov

  Replacement of an existing timber single-glazed sash windows with a timber slimline double-glazed sash windows at third floor level. (Linked with 26/06369/LBC)

  Awaiting decision Heritage and listed buildings Windows or glazing

• Brymon Court 31 - 32 Montagu Square London W1H 2LH

  25/07520/FULL Submitted 17 Oct 2025 50 yards away

  Replacement of windows to the front, side and rear elevations with aluminium framed windows.

  Granted Full applications Windows or glazing 21 docs

• Brymon Court 31 - 32 Montagu Square London W1H 2LH

  26/07281/NMA Submitted 23 Oct 2026 50 yards away

  93% historically approved · decision due ~18 Dec

  Amendments to planning permission dated 06 May 2026 (RN: 25/07520/FULL) for, 'Replacement of windows to the front, side and rear elevations with aluminium framed windows'; namely, to include the replacement of five doors.

  Awaiting decision Amendments Windows or glazing

• 30 Montagu Square London W1H 2LQ

  10/03246/FULL Submitted 12 Apr 2010 50 yards away

  Erection of rear extension to replace existing rear extension.

  Granted Full applications Extension 19 docs

• 26/07528/FULL Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

  Received 5 Nov, published by the council 6 Nov 2026 Full applications
• 26/05200/FULL Decided

  1 The Court House 165 Seymour Place London W1H 4PU

  Installation of waterproofing system to the existing lead flat roofs

  Received 3 Aug, published by the council 28 Aug 2026 Full applications
• 26/07521/FULL Awaiting decision

  Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

  Installation of one external condenser unit

  Received 4 Nov, published by the council 6 Nov 2026 Full applications
• 26/07508/FULL 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 26/07509/LBC)

  Received 4 Nov, published by the council 5 Nov 2026 Full applications
• 26/07472/FULL Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

  Received 3 Nov, published by the council 6 Nov 2026 Full applications