Flat 6 18 Dorset Square London NW1 6QB

This site has had 3 applications since 2026.

• 26/05763/ADLBC Decided

  Flat 6 18 Dorset Square London NW1 6QB

  Details vertical and horizontal sections through new window and door joinery, including double glazing and relationship of joinery to openings/dormers; pursuant to condition 3 of Listed Building consent dated 8th May 2026 (26/00742/LBC)

  Submitted 24 Aug 2026
• 26/01672/FULL Awaiting decision

  Flat 6 18 Dorset Square London NW1 6QB

  Replacement of windows and door with new at fourth and fifth floor levels. (Linked with 26/00742/LBC)

  Submitted 16 Mar 2026 Full applications

1. 9 Feb 2026

   Received by Westminster

2. 16 Mar 2026

   Validated

   Checked as complete and ready for consideration.

3. 21 Jul 2026

   Added to PlanIndex

4. Decision

   Awaiting decision

   Decision expected by 11 May 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.

• 26/01672/FULL Awaiting decision

  Flat 6 18 Dorset Square London NW1 6QB

  Replacement of windows and door with new at fourth and fifth floor levels. (Linked with 26/00742/LBC)

  Submitted 16 Mar 2026 Full applications

1 later application on the register refers to this one:

• 26/05763/ADLBC Decided

  Flat 6 18 Dorset Square London NW1 6QB

  Details vertical and horizontal sections through new window and door joinery, including double glazing and relationship of joinery to openings/dormers; pursuant to condition 3 of Listed Building consent dated 8th May 2026 (26/00742/LBC)

  Submitted 24 Aug 2026

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.

• 17 Dorset Square London NW1 6QB

  25/04537/FULL Submitted 2 Jul 2025 50 yards away

  Variation of condition 1 of planning permission dated 22nd August 2024 (RN 24/02030/FULL ) for the Use of building as two residential units (Class C3); Demolition and replacement of rear infill extension at lower ground and ground floor levels; Alterations to fenestration; Installation of plant machinery to front vaults and at roof level within enclosure; and associated external alterations. Internal alterations, including changes to plan form and refurbishment. NAMELY, Internal layout amendments and general refurbishment and revised drawings to reflect the proposed changes to the A/C and rear roof. (Linked to 25/04700/LBC)

  Decided Full applications Extension Demolition +1 20 docs

• Flat 6 18 Dorset Square London NW1 6QB

  26/05763/ADLBC Submitted 24 Aug 2026 50 yards away

  89% historically approved · decision due ~19 Oct

  Details vertical and horizontal sections through new window and door joinery, including double glazing and relationship of joinery to openings/dormers; pursuant to condition 3 of Listed Building consent dated 8th May 2026 (26/00742/LBC)

  Decided Loft or dormer Windows or glazing

• Flat 6 18 Dorset Square London NW1 6QB

  26/01672/FULL Submitted 16 Mar 2026 50 yards away

  87% historically approved · decision due ~11 May

  Replacement of windows and door with new at fourth and fifth floor levels. (Linked with 26/00742/LBC)

  Awaiting decision Full applications Windows or glazing 13 docs

• 15 - 17 Huntsworth Mews London NW1 6DE

  06/10231/ADFULL Submitted 20 Dec 2006 50 yards away

  Details of cable routes and louvre screening pursuant to Conditions 5 and 6 of planning permission dated 16 November 2006 (RN: 06/04407).

  Granted Full applications 3 docs

• 15 - 17 Huntsworth Mews London NW1 6DE

  05/04775/FULL Submitted 16 Jun 2005 50 yards away

  Retention of three air conditioning units on the rooftop.

  Refused Full applications 8 docs

• 15 - 17 Huntsworth Mews London NW1 6DE

  05/04774/CLEUD Submitted 16 Jun 2005 50 yards away

  Installation of six air conditioning units on rooftop.

  Granted Lawful development 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