Flat 2 5 Montagu Square London W1H 2LA

This site has had 2 applications since 2026.

• 26/04418/FULL Decided

  Flat 2 5 Montagu Square London W1H 2LA

  Installation of secondary glazing to existing historic single glazed timber windows. Replacement of existing window with new timber double glazed unit.

  Submitted 3 Jul 2026 Full applications

1. 3 Jul 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. 11 Sep 2026

   Status changed to Decided

   Previously Pending.

Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.

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.

• Flat 2 5 Montagu Square London W1H 2LA

  26/04418/FULL Submitted 3 Jul 2026 50 yards away

  87% historically approved · decision due ~28 Aug

  Installation of secondary glazing to existing historic single glazed timber windows. Replacement of existing window with new timber double glazed unit.

  Decided Full applications Windows or glazing

• 1 Gloucester Place Mews London W1U 8BA

  25/06633/FULL Submitted 16 Sep 2025 50 yards away

  Removal of the existing asphalt flat roof at first floor level and installation of a ventilated lead roof with other associated works.

  Granted Full applications 12 docs

• 1 Montagu Square London W1H 2LA

  25/06616/LBC Submitted 16 Sep 2025 50 yards away

  Installation of a replacement Portland stone step to match existing. Installation of reinforcing bars to horizontal mortar beds at basement and ground floor levels.

  Granted Heritage and listed buildings 11 docs

• 27 Gloucester Place London W1U 8HU

  22/03799/LBC Submitted 10 Jun 2022 50 yards away

  Internal alterations including opening through party wall at ground floor level. (Site includes 29 Gloucester Place)

  Granted Heritage and listed buildings 13 docs

• 8 Montagu Square London W1H 2LB

  26/01123/LBC Submitted 23 Feb 2026 50 yards away

  90% historically approved · decision due ~20 May

  Refurbishment works to the main roof including new roof slates, tapered lead valley gutters and new lead roof covering to existing dormer and refurbishment of lead box gutter on the rear elevation.

  Awaiting decision Heritage and listed buildings Loft or dormer Roofing 22 docs

• 29 Gloucester Place London W1U 8HT

  26/02601/LBC Submitted 20 Apr 2026 50 yards away

  90% historically approved · decision due ~15 Jun

  Installation of lightweight metal stud partitions finished with plasterboard and a skim coat to 2nd , 3rd and 4th floor offices.

  Awaiting decision Heritage and listed buildings 12 docs

• 26/04878/LBC Decided

  34 Grosvenor Street London W1K 4QU

  Internal works to facilitate the subdivision of 34 Grosvenor Street and 3 Three Kings Yard

  Received 21 Jul, published by the council 1 Aug 2026 Heritage and listed buildings
• 26/06299/LBC Awaiting decision

  Apartment 33 24 Park Crescent London W1B 1AA

  Alterations to internal partitions, door openings, doors and floor finishes.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06305/LBC Awaiting decision

  33A Dean Street London W1D 4PP

  Installation of new concrete slab with drainage channels at basement level and new fire surround in B.01.

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/06318/LBC Awaiting decision

  124 Hamilton Terrace London NW8 9UT

  Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06317/FULL)

  Received 15 Sep, published by the council 22 Sep 2026 Heritage and listed buildings
• 26/04141/LBC Decided

  80E Randolph Avenue London W9 1BG

  Replacement of sashes in two front windows at 2nd floor level and one rear window with slimline double glazed timber sashes. (Linked with 26/04142/FULL)

  Received 23 Jun, published by the council 21 Jul 2026 Heritage and listed buildings