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Planning application

Hallam House 56 - 60 Hallam Street London W1W 6JL

Granted Westminster 25/04301/FULL Full Planning Permission Application

Works: Extension Roofing Demolition Windows or glazing Small domestic

Read from the description, not a valuation. How we read the register

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Demolition of existing roof plant room and erection of a single floor roof extension to provide one residential unit (Class C3). Erection of replacement plant room, and provision of an external terrace, landscaping and green roof. Alterations to rear fenestration pattern. Erection of single storey lower ground floor extension within rear lightwell to provide additional office floorspace (Class E) and replacement of a window with a door at front ground floor level.

As published by the council, reference 25/04301/FULL

Application record

Reference
25/04301/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Application Permitted
Received
24 Jun 2025
Validated
4 Aug 2025
Decided
11 Nov 2025
Ward
West End
Decision by
Sub-Committee
Postcode
W1W 6JL

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2025: 1 approved, 0 refused.

  • 26/01015/FULL Awaiting decision

    Hallam House 56 - 60 Hallam Street London W1W 6JL

    Change of use of existing building to form 6 residential flats (Class C3), alterations to rear fenestration pattern, erection of single storey lower ground floor extension within rear lightwell to provide additional residential floorspace (Class C3) and replacement of an existing window with a door at front ground floor level.

    Submitted 17 Feb 2026 Full applications
  • 26/00825/ADFULL Awaiting decision

    Hallam House 56 - 60 Hallam Street London W1W 6JL

    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 4 of prior approval dated 11 March 2025 (RN: 25/00247/P3JPA).

    Submitted 11 Feb 2026 Full applications
  • 26/00826/ADFULL Awaiting decision

    Hallam House 56 - 60 Hallam Street London W1W 6JL

    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 18 of planning permission dated 19 November 2025 (RN: 25/04301/FULL).

    Submitted 11 Feb 2026 Full applications

Timeline

Dates from the published record

  1. 24 Jun 2025

    Received by Westminster

  2. 4 Aug 2025

    Validated

    Checked as complete and ready for consideration.

  3. 11 Nov 2025

    Decision issued: Application Permitted

  4. 30 Aug 2026

    Added to PlanIndex

Cases linked to this one on the register

1 later application on the register refers to this one:

  • 26/00826/ADFULL Awaiting decision

    Hallam House 56 - 60 Hallam Street London W1W 6JL

    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 18 of planning permission dated 19 November 2025 (RN: 25/04301/FULL).

    Submitted 11 Feb 2026 Full applications

Who's behind it

Company information only, from the register and Companies House

Agent on file, registered in London

1,789 applications on PlanIndex · across 174 councils · 92% granted

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Documents

Plans, drawings, consultee responses and the officer's report

124 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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What this grant of permission means

Westminster granted permission on 11 November 2025, 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.

About full applications

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.

Nearby applications

Within 500 metres

  • Hallam House 56 - 60 Hallam Street London W1W 6JL

    26/01015/FULL Submitted 17 Feb 2026 2m away

    87% historically approved · decision due ~14 Apr

    Change of use of existing building to form 6 residential flats (Class C3), alterations to rear fenestration pattern, erection of single storey lower ground floor extension within rear lightwell to provide additional residential floorspace (Class C3) and replacement of an existing window with a door at front ground floor level.

    Awaiting decision Full applications New dwelling Extension +1 34 docs
    Small domestic

  • Hallam House 56 - 60 Hallam Street London W1W 6JL

    26/00825/ADFULL Submitted 11 Feb 2026 4m away

    87% historically approved · decision due ~8 Apr

    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 4 of prior approval dated 11 March 2025 (RN: 25/00247/P3JPA).

    Awaiting decision Full applications 5 docs

  • Hallam House 56 - 60 Hallam Street London W1W 6JL

    26/00826/ADFULL Submitted 11 Feb 2026 4m away

    87% historically approved · decision due ~8 Apr

    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 18 of planning permission dated 19 November 2025 (RN: 25/04301/FULL).

    Awaiting decision Full applications 5 docs

  • Northumberland House 155 - 157 Great Portland Street London W1W 6QP

    05/01357/CLEUD Submitted 21 Feb 2005 12m away

    Installation of two air conditioning units in rear lightwell.

    Granted Lawful development 5 docs

  • Northumberland House 155-157 Great Portland Street London W1W 6QP

    07/05158/FULL Submitted 12 Jun 2007 12m away

    Relocation of air conditioning units onto the main roof within a new enclosure.

    Refused Full applications 12 docs

  • Northumberland House 155 - 157 Great Portland Street London W1W 6QP

    06/01678/FULL Submitted 6 Mar 2006 12m away

    Retention of four air conditioning condenser units on rear first floor flat roof.

    Refused Full applications 7 docs

In Westminster

  • 26/06024/FULL Awaiting decision

    House Of Commons Palace Of Westminster Parliament Square London SW1A 0AA

    Installation of new and replacement electronic equipment within Speaker. (Linked with 26/06025/LBC)

    3 Sep 2026 Full applications
  • 26/06017/FULL Awaiting decision

    38 Lauderdale Mansions Lauderdale Road London W9 1NE

    Installation of an external AC Unit / Heat Pump at roof level.

    2 Sep 2026 Full applications
  • 26/05938/FULL Awaiting decision

    24 Vincent Square London SW1P 2NJ

    Subdivision of existing residential property to create two self-contained 3-bedroom family homes, along with cycle parking and associated external alterations.

    1 Sep 2026 Full applications
  • 26/05935/FULL Awaiting decision

    47 Hereford Road London W2 5AH

    Installation of one number new external condenser unit to the southerly elevation service alley.

    1 Sep 2026 Full applications
  • 26/05959/FULL Awaiting decision

    Basement And Ground Floor 50 New Bond Street London W1S 1BJ

    Installation of three new condensers on the roof, within an existing designated plant area.

    1 Sep 2026 Full applications