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Planning application

17 Welbeck Street London W1G 9XJ

Granted Westminster 25/06437/FULL Full Planning Permission Application

Relates to 25/06438/LBC

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

Proposal

Installation of five condenser units to internal lightwell and associated pipework and refurbishment works including repairs to external staircase. (Linked to 25/06438/LBC)

As published by the council, reference 25/06437/FULL

Application record

Reference
25/06437/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
9 Sep 2025
Validated
9 Sep 2025
Decided
3 Mar 2026
Ward
Marylebone
Decision by
Delegated Decision
Postcode
W1G 9XJ

Site history

Applications at this address on the Westminster register

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

  • 26/02773/ADLBC Granted

    17 Welbeck Street London W1G 9XJ

    Detailed drawings (scale 1:20 and 1:5) of the new doors, with key details and locations, including labelled and located photographs of existing to be replaced pursuant to condition 4 of listed building consent dated 3rd March 2026 (RN: 25/06438/LBC)

    Decided 15 May 2026 Conditions
  • 25/06438/LBC Granted

    17 Welbeck Street London W1G 9XJ

    Installation of five condenser units to internal lightwell and internal fan coil units with associated pipework, refurbishment works including repairs to external staircase, removal of non-original metal shutters to windows, reconstruct existing internal riser in fireproof material, replace non-original internal doors with panelled doors, replaced existing WCs, remove non-original internal glazing and rebuilt partition, insulation to roof, new partition to mansard roof. (Linked to 25/06437/FULL)

    Decided 3 Mar 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 9 Sep 2025

    Received by Westminster

  2. 3 Mar 2026

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/06438/LBC Granted

    17 Welbeck Street London W1G 9XJ

    Installation of five condenser units to internal lightwell and internal fan coil units with associated pipework, refurbishment works including repairs to external staircase, removal of non-original metal shutters to windows, reconstruct existing internal riser in fireproof material, replace non-original internal doors with panelled doors, replaced existing WCs, remove non-original internal glazing and rebuilt partition, insulation to roof, new partition to mansard roof. (Linked to 25/06437/FULL)

    Decided 3 Mar 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/06438/LBC Granted

    17 Welbeck Street London W1G 9XJ

    Installation of five condenser units to internal lightwell and internal fan coil units with associated pipework, refurbishment works including repairs to external staircase, removal of non-original metal shutters to windows, reconstruct existing internal riser in fireproof material, replace non-original internal doors with panelled doors, replaced existing WCs, remove non-original internal glazing and rebuilt partition, insulation to roof, new partition to mansard roof. (Linked to 25/06437/FULL)

    Decided 3 Mar 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Howard de Walden Estate ltd Agent

25 applications on PlanIndex · 95% granted

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Documents

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

24 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 3 March 2026, 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 0.3 miles

  • 17 Welbeck Street London W1G 9XJ

    25/06438/LBC Submitted 9 Sep 2025 50 yards away

    Installation of five condenser units to internal lightwell and internal fan coil units with associated pipework, refurbishment works including repairs to external staircase, removal of non-original metal shutters to windows, reconstruct existing internal riser in fireproof material, replace non-original internal doors with panelled doors, replaced existing WCs, remove non-original internal glazing and rebuilt partition, insulation to roof, new partition to mansard roof. (Linked to 25/06437/FULL)

    Granted Heritage and listed buildings Loft or dormer Windows or glazing 21 docs

  • 17 Welbeck Street London W1G 9XJ

    26/02773/ADLBC Submitted 27 Apr 2026 50 yards away

    Detailed drawings (scale 1:20 and 1:5) of the new doors, with key details and locations, including labelled and located photographs of existing to be replaced pursuant to condition 4 of listed building consent dated 3rd March 2026 (RN: 25/06438/LBC)

    Granted Conditions 9 docs

  • 13 - 14 Welbeck Street London W1G 9BN

    22/03333/FULL Submitted 18 May 2022 50 yards away

    Internal and external alterations to the buildings including new doors, a new lightwell at lower ground floor level of 14 Welbeck Street, new rear ground floor terrace to 13 Welbeck Street and installation of plant in the front pavement vaults, at main roof level and rear first floor level.

    Granted Full applications 37 docs

  • 13 - 14 Welbeck Street London W1G 9BN

    22/03334/LBC Submitted 18 May 2022 50 yards away

    Internal and external alterations to the buildings including new doors, a new lightwell at lower ground floor level of 14 Welbeck Street, new rear ground floor terrace to 13 Welbeck Street and installation of plant in the front pavement vaults, at main roof level and rear first floor level.

    Granted Heritage and listed buildings 37 docs

  • Ground Floor 1 Bentinck Street London W1U 2EA

    26/05405/FULL Submitted 7 Aug 2026 50 yards away

    87% historically approved · decision due ~2 Oct

    Use of the ground floor for Dual Use as Retail (Class E (a)) and Caf/e (Class E (b)) for a temporary period of 20 years.

    Awaiting decision Full applications

  • 1 Bentinck Street London W1U 2EA

    26/05398/FULL Submitted 7 Aug 2026 50 yards away

    87% historically approved · decision due ~12 Oct

    Installation of external air condensers to lower-ground lightwell with corresponding internal alterations to lower-ground floor - third floor including: degassing and associated piped heating system, installation of fan coil units and panel heaters, acoustic improvements and slimline double glazing throughout. (Linked with 26/05399/LBC)

    Awaiting decision Full applications Windows or glazing

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront with Medication Dispensing Outlet.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Alterations to rear elevation at basement level comprising replacement window and installation of double opening door.

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL 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 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications