Flat 1 49 Montagu Square London W1H 2LW

This site has had 2 applications since 2025: 2 approved, 0 refused.

• 25/05705/FULL Granted

  Flat 1 49 Montagu Square London W1H 2LW

  Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05706/LBC)

  Decided 22 Apr 2026 Full applications

1. 14 Aug 2025

   Received by Westminster

2. 15 Sep 2025

   Validated

   Checked as complete and ready for consideration.

3. 22 Apr 2026

   Decision issued: Application Permitted

4. 21 Jul 2026

   Added to PlanIndex

• 25/05705/FULL Granted

  Flat 1 49 Montagu Square London W1H 2LW

  Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05706/LBC)

  Decided 22 Apr 2026 Full applications

1 later application on the register refers to this one:

• 25/05705/FULL Granted

  Flat 1 49 Montagu Square London W1H 2LW

  Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05706/LBC)

  Decided 22 Apr 2026 Full applications

Westminster granted permission on 22 April 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. 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 1 49 Montagu Square London W1H 2LW

  25/05705/FULL Submitted 14 Aug 2025 50 yards away

  Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05706/LBC)

  Granted Full applications Windows or glazing 24 docs

• 50 Montagu Square London W1H 2LW

  26/04360/LBC Submitted 1 Jul 2026 50 yards away

  90% historically approved · decision due ~26 Aug

  Replacement of areas of roof covering with slate tiles to match existing, and replacement of localised areas of flashing to the roof.

  Awaiting decision Heritage and listed buildings Roofing

• Flat 3 54 Montagu Square London W1H 2LP

  26/05923/LBC Submitted 31 Aug 2026 50 yards away

  90% historically approved · decision due ~2 Nov

  Internal layout alterations and associated works.

  Awaiting decision Heritage and listed buildings

• 9 Montagu Mews West London W1H 2EE

  26/02315/FULL Submitted 8 Apr 2026 50 yards away

  87% historically approved · decision due ~10 Jun

  Installation of air conditioning condenser unit and acoustic enclosure to roof.

  Awaiting decision Full applications 23 docs

• 8 Montagu Mews West London W1H 2EE

  26/03228/FULL Submitted 15 May 2026 50 yards away

  87% historically approved · decision due ~10 Jul

  Roof extension, installation of air conditioning unit in an acoustic enclosure, alterations to the front and rear facades and associated works.

  Awaiting decision Full applications Extension 28 docs

• Ellerton House 11 Bryanston Square London W1H 2DQ

  25/07173/FULL Submitted 6 Oct 2025 50 yards away

  Replacement of the existing timber pergola over the rear terrace with new. Linked with 25/07174/LBC (Retrospective)

  Granted Full applications 14 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