17 Hertford Street London W1J 7RS

This site has had 11 applications since 2007: 3 approved, 0 refused.

• 26/06165/LBC Decided

  17 Hertford Street London W1J 7RS

  Internal alterations to the basement including new lightweight timber-stud partitions to reorganise the existing basement layout; Installation of new sanitaryware in a newly configured bathroom; Replacement of modern kitchen fittings; and Installation of traditional four-panel timber doors, architraves and ironmongery designed to match existing doors.

  Submitted 9 Sep 2026 Heritage and listed buildings
• 26/03409/FULL Awaiting decision

  17 Hertford Street London W1J 7RS

  Replacement of the mansard infill extension to the south east of the property by extending the existing bay upwards by a single storey (3-storeys total) and associated roof works to improve the internal space. (Linked with 26/03410/LBC)

  Submitted 22 May 2026 Full applications
• 26/03484/ADLBC Decided

  17 Hertford Street London W1J 7RS

  Details of all new windows / reduction in size of dormer windows / facing materials pursuant to conditions 4, 5 and 7 of listed building consent dated 13 February 2025 (RN: 24/03932/LBC) [Linked to 26/03406/ADFULL]

  Submitted 22 May 2026
• 26/03410/LBC Awaiting decision

  17 Hertford Street London W1J 7RS

  Replacement of the mansard infill extension to the south east of the property by extending the existing bay upwards by a single storey (3-storeys total) and associated roof works to improve the internal space. (Linked with 26/03409/FULL)

  Submitted 22 May 2026 Heritage and listed buildings
• 26/03406/ADFULL Decided

  17 Hertford Street London W1J 7RS

  Details of all new windows / reduction in size of dormer windows / facing materials pursuant to conditions 4, 5 and 6 of planning permission dated 13 February 2025 (RN: 24/03931/FULL) [Linked to 26/03484/ADLBC]

  Submitted 22 May 2026
• 26/02817/FULL Withdrawn

  17 Hertford Street London W1J 7RS

  Replacement of non-original casement windows at Level 03 with timber sash windows; new structure for mansard extension, infill of existing lightwell and repositioning of skylight above stairwell. [Linked to 26/02818/LBC]

  Submitted 28 Apr 2026 Full applications
• 26/02818/LBC Awaiting decision

  17 Hertford Street London W1J 7RS

  Replacement of non-original casement windows at Level 03 with timber sash windows; new structure for mansard extension, infill of existing lightwell and repositioning of skylight above stairwell. [Linked to 26/02817/FULL]

  Submitted 28 Apr 2026 Heritage and listed buildings
• 25/07827/FULL Withdrawn

  17 Hertford Street London W1J 7RS

  Addition of a fourth-floor mansard roof to allow for the creation of a one-bedroom apartment for short term letting purposes, replacement of windows at third floor level, internal and external restoration, redecoration and minor reconfigurations and other associated works. (Linked 25/07828/LBC)

  Decided 26 Feb 2026 Full applications
• 25/07828/LBC Granted

  17 Hertford Street London W1J 7RS

  Internal reconfigurations, restoration and associated works.

  Decided 31 Mar 2026 Heritage and listed buildings
• 07/01340/LBC Granted

  17 Hertford Street London W1J 7RS

  Installation of nine air-conditioning units at roof level and replacement of roof access enclosure and rooflight; installation of associated internal units and pipework.

  Decided 3 Jul 2008 Heritage and listed buildings

1. 12 Feb 2007

   Received by Westminster

2. 14 May 2007

   Validated

   Checked as complete and ready for consideration.

3. 3 Jul 2008

   Decision issued: Application Permitted

4. 29 Jul 2026

   Added to PlanIndex

Westminster granted permission on 3 July 2008, 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.

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.

• 17 Hertford Street London W1J 7RS

  07/01340/LBC Submitted 12 Feb 2007 50 yards away

  Installation of nine air-conditioning units at roof level and replacement of roof access enclosure and rooflight; installation of associated internal units and pipework.

  Granted Heritage and listed buildings Loft or dormer 2 docs

• 17 Hertford Street London W1J 7RS

  26/06165/LBC Submitted 9 Sep 2026 50 yards away

  90% historically approved · decision due ~4 Nov

  Internal alterations to the basement including new lightweight timber-stud partitions to reorganise the existing basement layout; Installation of new sanitaryware in a newly configured bathroom; Replacement of modern kitchen fittings; and Installation of traditional four-panel timber doors, architraves and ironmongery designed to match existing doors.

  Decided Heritage and listed buildings

• 17 Hertford Street London W1J 7RS

  26/03484/ADLBC Submitted 22 May 2026 50 yards away

  89% historically approved · decision due ~3 Aug

  Details of all new windows / reduction in size of dormer windows / facing materials pursuant to conditions 4, 5 and 7 of listed building consent dated 13 February 2025 (RN: 24/03932/LBC) [Linked to 26/03406/ADFULL]

  Decided Loft or dormer Windows or glazing 8 docs

• 17 Hertford Street London W1J 7RS

  26/03406/ADFULL Submitted 22 May 2026 50 yards away

  89% historically approved · decision due ~3 Aug

  Details of all new windows / reduction in size of dormer windows / facing materials pursuant to conditions 4, 5 and 6 of planning permission dated 13 February 2025 (RN: 24/03931/FULL) [Linked to 26/03484/ADLBC]

  Decided Loft or dormer Windows or glazing 8 docs

• 17 Hertford Street London W1J 7RS

  25/07827/FULL Submitted 29 Oct 2025 50 yards away

  Addition of a fourth-floor mansard roof to allow for the creation of a one-bedroom apartment for short term letting purposes, replacement of windows at third floor level, internal and external restoration, redecoration and minor reconfigurations and other associated works. (Linked 25/07828/LBC)

  Withdrawn Full applications Loft or dormer Windows or glazing 37 docs

• 17 Hertford Street London W1J 7RS

  25/07828/LBC Submitted 29 Oct 2025 50 yards away

  Internal reconfigurations, restoration and associated works.

  Granted Heritage and listed buildings 56 docs

• 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