Basement And Ground Floor 38 Montagu Square London W1H 2LL

This site has had 3 applications since 2025: 0 approved, 1 refused.

• 26/01422/LBC Awaiting decision

  Basement And Ground Floor 38 Montagu Square London W1H 2LL

  Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC) for the demolition of existing roof and erection of a mansard roof extension at first floor level and alterations to the front and rear of the portion of the building fronting onto Bryanston Mews East. Subdivision and reconfiguration of existing ground and lower ground floor levels of the building and together with the new first floor extension to the mews portion of the building, create two self-contained residential units (Class C3) and associated external alterations. Lowering of front pavement vault [Site includes 22 Bryanston Mews East] (Linked with 23/07346/FULL) NAMELY, to replace the wording of "conservation rooflights" with "low profile horizontal rooflights". (Linked to 26/00837/FULL)

  Submitted 10 Feb 2026 Heritage and listed buildings
• 25/09024/ADFULL Refused

  Basement And Ground Floor 38 Montagu Square London W1H 2LL

  Details of the new rooflights, demonstrating that these are conservation rooflights pursuant to condition 4 (B) of listed building dated 28th December 2023 (RN: 23/07347/LBC)

  Decided 21 Jan 2026 Full applications

1. 11 Feb 2026

   Received by Westminster

2. 21 Jul 2026

   Added to PlanIndex

3. Decision

   Awaiting decision

   Decision expected by 8 April 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 91 days over the applications it decided in the last year.

1 later application on the register refers to this one:

• 26/01422/LBC Awaiting decision

  Basement And Ground Floor 38 Montagu Square London W1H 2LL

  Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC) for the demolition of existing roof and erection of a mansard roof extension at first floor level and alterations to the front and rear of the portion of the building fronting onto Bryanston Mews East. Subdivision and reconfiguration of existing ground and lower ground floor levels of the building and together with the new first floor extension to the mews portion of the building, create two self-contained residential units (Class C3) and associated external alterations. Lowering of front pavement vault [Site includes 22 Bryanston Mews East] (Linked with 23/07346/FULL) NAMELY, to replace the wording of "conservation rooflights" with "low profile horizontal rooflights". (Linked to 26/00837/FULL)

  Submitted 10 Feb 2026 Heritage and listed buildings

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.

• Basement And Ground Floor 38 Montagu Square London W1H 2LL

  25/09024/ADFULL Submitted 12 Dec 2025 50 yards away

  Details of the new rooflights, demonstrating that these are conservation rooflights pursuant to condition 4 (B) of listed building dated 28th December 2023 (RN: 23/07347/LBC)

  Refused Full applications Loft or dormer 5 docs

• 39 Montagu Square London W1H 2LL

  26/07416/LBC Submitted 30 Oct 2026 50 yards away

  90% historically approved · decision due ~25 Dec

  Amalgamation of Flats 3 and 4 to form one single dwelling including associated internal reconfiguration and refurbishments, alterations to access arrangements and improvements to the existing terrace and private amenity spaces. Together with the removal and alteration of modern partitions, roof replacement, rebuilding of the roof terrace, new plant and addition of a new staircase, structural works, new window openings, and other associated works. (Linked with 26/07415/FULL)

  Awaiting decision Heritage and listed buildings New dwelling Roofing +1
  Domestic

• 39 Montagu Square London W1H 2LL

  26/07415/FULL Submitted 30 Oct 2026 50 yards away

  88% historically approved · decision due ~25 Dec

  Amalgamation of Flats 3 and 4 (Use Class C3) to form one single dwelling (Use Class C3) including associated internal reconfiguration and refurbishments, alterations to access arrangements and improvements to the existing terrace and private amenity spaces, new plant and other associated works. (Linked with 26/07416/LBC)

  Awaiting decision Full applications New dwelling
  Domestic

• Basement And Ground Floor 38 Montagu Square London W1H 2LL

  26/01422/LBC Submitted 10 Feb 2026 50 yards away

  90% historically approved · decision due ~7 Apr

  Variation of condition 4(b) of listed building consent dated 28 December 2023 (RN 23/07347/LBC) for the demolition of existing roof and erection of a mansard roof extension at first floor level and alterations to the front and rear of the portion of the building fronting onto Bryanston Mews East. Subdivision and reconfiguration of existing ground and lower ground floor levels of the building and together with the new first floor extension to the mews portion of the building, create two self-contained residential units (Class C3) and associated external alterations. Lowering of front pavement vault [Site includes 22 Bryanston Mews East] (Linked with 23/07346/FULL) NAMELY, to replace the wording of "conservation rooflights" with "low profile horizontal rooflights". (Linked to 26/00837/FULL)

  Awaiting decision Heritage and listed buildings Extension Loft or dormer +1 6 docs

• Flat 1 40 Montagu Square London W1H 2LL

  25/09109/LBC Submitted 17 Dec 2025 50 yards away

  Internal alterations at ground and first floor levels.

  Granted Heritage and listed buildings 45 docs

• 16 Bryanston Mews East London W1H 2DB

  26/05412/FULL Submitted 10 Aug 2026 50 yards away

  88% historically approved · decision due ~5 Oct

  Installation of an air source heat pump and air conditioning condenser unit within acoustic enclosures on the flat roof area at rear first floor level.

  Decided Full applications

• 26/07528/FULL Awaiting decision

  69 Eaton Place London SW1X 8DF

  Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

  Received 5 Nov, published by the council 6 Nov 2026 Full applications
• 26/05200/FULL Decided

  1 The Court House 165 Seymour Place London W1H 4PU

  Installation of waterproofing system to the existing lead flat roofs

  Received 3 Aug, published by the council 28 Aug 2026 Full applications
• 26/07521/FULL Awaiting decision

  Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

  Installation of one external condenser unit

  Received 4 Nov, published by the council 6 Nov 2026 Full applications
• 26/07508/FULL Awaiting decision

  Buckingham Palace The Mall London SW1A 1AA

  Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

  Received 4 Nov, published by the council 5 Nov 2026 Full applications
• 26/07472/FULL Awaiting decision

  Flat 3 82 New Cavendish Street London W1G 9TA

  Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

  Received 3 Nov, published by the council 6 Nov 2026 Full applications