Skip to content
PlanIndex Get alerts
Menu

Planning application

17 Hertford Street London W1J 7RS

Awaiting decision Westminster 26/06165/LBC Heritage and listed buildings

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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.

As published by the council, reference 26/06165/LBC

Application record

Reference
26/06165/LBC
Category
Heritage and listed buildings
Status
Pending
Received
9 Sep 2026
Validated
9 Sep 2026
Postcode
W1J 7RS

Site history

Applications at this address on the Westminster register

This site has had 11 applications since 2007: 2 approved, 0 refused.

  • 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 Awaiting decision

    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 Conditions
  • 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 Awaiting decision

    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 Full applications
  • 26/02817/FULL 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 26/02818/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 Awaiting decision

    17 Hertford Street London W1J 7RS

    Internal restoration, redecoration and minor reconfigurations associated with the implementation of planning permission (24-03931-FULL) and listed building permission (24-03932-LBC); addition of a fourth-floor mansard roof to allow for the creation of a one-bedroom apartment for short term letting purposes; replacement of existing windows at third floor level with traditional timber sashes and other associated works. (Linked 25/07828/LBC)

    Submitted 29 Oct 2025 Full applications
  • 25/07828/LBC Awaiting decision

    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 with 25/07827/FULL)

    Submitted 29 Oct 2025 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
  • 07/01339/FULL Granted

    17 Hertford Street London W1J 7RS

    Installation of nine air-conditioning units at roof level and replacement of roof access enclosure and rooflight.

    Decided 3 Jul 2008 Full applications

Timeline

Dates from the published record

  1. 9 Sep 2026

    Received by Westminster

  2. 15 Sep 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 4 November 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 64 days over the applications it decided in the last year.

What happens while it is decided

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 93 days. More in our guide to how long planning decisions take.

About heritage and listed building applications

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.

Nearby applications

Within 500 metres

  • 17 Hertford Street London W1J 7RS

    07/01340/LBC Submitted 12 Feb 2007 0m 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

    07/01339/FULL Submitted 12 Feb 2007 0m away

    Installation of nine air-conditioning units at roof level and replacement of roof access enclosure and rooflight.

    Granted Full applications Loft or dormer 14 docs

  • 17 Hertford Street London W1J 7RS

    26/03484/ADLBC Submitted 22 May 2026 0m away

    91% 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]

    Awaiting decision Conditions Loft or dormer Windows or glazing 8 docs

  • 17 Hertford Street London W1J 7RS

    26/03406/ADFULL Submitted 22 May 2026 0m away

    87% 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]

    Awaiting decision Full applications Loft or dormer Windows or glazing 8 docs

  • 17 Hertford Street London W1J 7RS

    25/07827/FULL Submitted 29 Oct 2025 3m away

    87% historically approved · decision due ~1 Jan

    Internal restoration, redecoration and minor reconfigurations associated with the implementation of planning permission (24-03931-FULL) and listed building permission (24-03932-LBC); addition of a fourth-floor mansard roof to allow for the creation of a one-bedroom apartment for short term letting purposes; replacement of existing windows at third floor level with traditional timber sashes and other associated works. (Linked 25/07828/LBC)

    Awaiting decision Full applications Loft or dormer Windows or glazing 31 docs

  • 17 Hertford Street London W1J 7RS

    25/07828/LBC Submitted 29 Oct 2025 3m away

    90% historically approved · decision due ~1 Jan

    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 with 25/07827/FULL)

    Awaiting decision Heritage and listed buildings Loft or dormer Windows or glazing 32 docs

In Westminster

  • 26/06150/LBC Awaiting decision

    37 Crawford Street London W1H 1HA

    Use of the First, Second and Third Floors as residential units (Class C3) with Office (or other Use Class E) Use retained at Basement and Ground Floor Levels. (Linked with 26/06149/FULL)

    9 Sep 2026 Heritage and listed buildings
  • 26/06183/LBC Awaiting decision

    Ground Left Burlington House Piccadilly London W1J 0BD

    Facade gommage cleaning to the SE elevation of Burlington House, facing onto the courtyard. These works will be supervised by Purcell Architects. The works are in preparation for a detailed elevation condition survey.

    9 Sep 2026 Heritage and listed buildings
  • 26/06155/LBC Awaiting decision

    17 Bedford Street London WC2E 9HP

    Display of externally illuminated projection sign measuring 900mm x 300mm (Linked with 26/06146/ADV)

    9 Sep 2026 Heritage and listed buildings
  • 26/06151/LBC Awaiting decision

    The London Pavillion 1 Piccadilly London W1J 0DA

    Installation of 6 digital advertisement displays within existing historic advertisement niches on the building facade. (Linked with 26/06128/ADV)

    9 Sep 2026 Heritage and listed buildings
  • 26/06139/LBC Awaiting decision

    38 York Terrace West London NW1 4QA

    Internal alterations to create an open plan living and kitchen area, separated by sliding glazed screens, with associated decorative finishing works.

    8 Sep 2026 Heritage and listed buildings