Flat 4 8 Upper Montagu Street London W1H 2PB

This site has had 2 applications since 2026.

• 26/06369/LBC Awaiting decision

  Flat 4 8 Upper Montagu Street London W1H 2PB

  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)

  Submitted 17 Sep 2026 Heritage and listed buildings

1. 17 Sep 2026

   Received by Westminster

2. 1 Oct 2026

   Validated

   Checked as complete and ready for consideration.

3. 2 Oct 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 26 November 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.

• 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

  26/06369/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

• Flat 1 8 Upper Montagu Street London W1H 2PB

  26/04889/FULL Submitted 21 Jul 2026 50 yards away

  88% 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 to 26/04890/LBC)

  Awaiting decision Full applications Windows or glazing 32 docs

• 16 Upper Montagu Street London W1H 2AN

  10/05775/LBC Submitted 8 Jul 2010 50 yards away

  Installation of Portland stone paving slabs to front area lightwell cross-over.

  Granted Heritage and listed buildings 9 docs

• 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

• 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

• 26/05984/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