Flat 9 121 Gloucester Terrace London W2 3HB

This site has had 2 applications since 2026.

• 26/04227/FULL Awaiting decision

  Flat 9 121 Gloucester Terrace London W2 3HB

  Installation of slimline double-glazed windows to the front and rear. Internal alterations. [Linked to 26/04228/LBC]

  Submitted 26 Jun 2026 Full applications

1. 26 Jun 2026

   Received by Westminster

2. 2 Jul 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 27 August 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 66 days over the applications it decided in the last year.

• 26/04227/FULL Awaiting decision

  Flat 9 121 Gloucester Terrace London W2 3HB

  Installation of slimline double-glazed windows to the front and rear. Internal alterations. [Linked to 26/04228/LBC]

  Submitted 26 Jun 2026 Full applications

1 later application on the register refers to this one:

• 26/04227/FULL Awaiting decision

  Flat 9 121 Gloucester Terrace London W2 3HB

  Installation of slimline double-glazed windows to the front and rear. Internal alterations. [Linked to 26/04228/LBC]

  Submitted 26 Jun 2026 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 94 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.

• Flat 9 121 Gloucester Terrace London W2 3HB

  26/04227/FULL Submitted 26 Jun 2026 50 yards away

  87% historically approved · decision due ~27 Aug

  Installation of slimline double-glazed windows to the front and rear. Internal alterations. [Linked to 26/04228/LBC]

  Awaiting decision Full applications Windows or glazing 21 docs

• 20 Devonshire Terrace London W2 3DW

  26/00925/LBC Submitted 13 Feb 2026 50 yards away

  90% historically approved · decision due ~30 Sep

  Replacement mechanical equipment to front vault an boiler flue upgrade; replacement front door; and associated works. (Linked to 26/00924/FULL)

  Awaiting decision Heritage and listed buildings

• 20 Devonshire Terrace London W2 3DW

  26/00924/FULL Submitted 13 Feb 2026 50 yards away

  87% historically approved · decision due ~30 Sep

  Replacement mechanical equipment to front vault an boiler flue upgrade; replacement front door; and associated works. (Linked to 26/00925/LBC)

  Awaiting decision Full applications

• 15A Devonshire Terrace London W2 3DW

  26/03576/FULL Submitted 1 Jun 2026 50 yards away

  Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

  Decided Full applications Extension

• Flat 1 17 Devonshire Terrace London W2 3DW

  25/05958/CLLB Submitted 15 Aug 2025 50 yards away

  Internal cleaning and repairs to address water damage to affected walls and floors including removal and replacement of skirting boards and architrave; replacement of internal floor coverings with timber plank floor covering and ceramic floor tiles; works to internal solid walls to remove and replace ceramic wall tiles from en-suite bathroom; and redecorate walls, ceilings, joinery and pipework.

  Granted 11 docs

• 24 Chilworth Street London W2 6DT

  25/06746/ADFULL Submitted 19 Sep 2025 50 yards away

  87% historically approved · decision due ~14 Nov

  Details of appropriate arrangements to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site pursuant to condition 5 of planning permission dated 26th June 2025 (RN: 25/01847/FULL).

  Awaiting decision Full applications 7 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