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Planning application

20 Hertford Street London W1J 7RX

Withdrawn Westminster 25/08992/CLOPUD Certificate of Lawfulness (proposed)

Works: Windows or glazing

Withdrawn before a decision, so it carries no planning weight. A revised scheme can be submitted at any time.

Proposal

Replacement of existing timber-framed windows with new traditionally detailed timber windows matching the existing openings in size and opening style, with a traditional glazing style.

As published by the council, reference 25/08992/CLOPUD

Application record

Reference
25/08992/CLOPUD
Type
Certificate of Lawfulness (proposed)
Status
Withdrawn
Decision
Withdrawn As published: Application Withdrawn
Received
11 Dec 2025
Validated
11 Dec 2025
Decided
7 Mar 2026
Ward
West End
Postcode
W1J 7RX

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025.

  • 26/00932/FULL Awaiting decision

    20 Hertford Street London W1J 7RX

    Replacement of existing timber-framed windows with new traditionally detailed timber windows matching the existing openings in size and opening style. Minor internal alterations to lower ground floor level, including the replacement of an existing window with a traditional door into the lightwell.

    Submitted 13 Feb 2026 Full applications
  • 25/08753/FULL Awaiting decision

    20 Hertford Street London W1J 7RX

    Rear extension at fourth floor, installation of new double glazed sliding doors to existing terrace; internal layout amendments; alteration of the existing terrace rooflight, installation of automatic opening vent (AOV) and installation of two new rooflights on main roof.

    Submitted 2 Dec 2025 Full applications

Timeline

Dates from the published record

  1. 11 Dec 2025

    Received by Westminster

  2. 7 Mar 2026

    Decision issued: Application Withdrawn

  3. 29 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Echlin Studio Ltd Agent, registered in London

Active · incorporated 2019 · London

3 applications on PlanIndex

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Documents

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

32 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 withdrawal means

The applicant withdrew this application before Westminster decided it, and is free to submit a revised scheme at any time. More in our guide to what happens after a planning decision.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 20 Hertford Street London W1J 7RX

    25/08753/FULL Submitted 2 Dec 2025 50 yards away

    87% historically approved · decision due ~27 Jan

    Rear extension at fourth floor, installation of new double glazed sliding doors to existing terrace; internal layout amendments; alteration of the existing terrace rooflight, installation of automatic opening vent (AOV) and installation of two new rooflights on main roof.

    Awaiting decision Full applications Extension Loft or dormer +1 30 docs

  • 20 Hertford Street London W1J 7RX

    26/00932/FULL Submitted 13 Feb 2026 50 yards away

    87% historically approved · decision due ~10 Apr

    Replacement of existing timber-framed windows with new traditionally detailed timber windows matching the existing openings in size and opening style. Minor internal alterations to lower ground floor level, including the replacement of an existing window with a traditional door into the lightwell.

    Awaiting decision Full applications Windows or glazing 38 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.

    Awaiting decision Heritage and listed buildings

  • 17 Hertford Street London W1J 7RS

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

  • 17 Hertford Street London W1J 7RS

    26/03409/FULL Submitted 22 May 2026 50 yards away

    87% historically approved · decision due ~6 Aug

    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)

    Awaiting decision Full applications Extension Loft or dormer 32 docs
    Small domestic

In Westminster

  • 26/06158/CLOPUD Awaiting decision

    2 Hamilton Gardens London NW8 9PT

    Erection of replacement, enlarged single storey ground floor rear extension.

    Received 9 Sep, published by the council 15 Sep 2026 Lawful development
  • 26/06080/CLEUD Awaiting decision

    91 Gloucester Place London W1U 6JG

    Certificate of lawfulness for an existing use or development to confirm that the development authorised by full planning permission ref. 22/08385/FULL & listed building consent (RN 22/08386/LBC) has lawfully commenced as a result of the works evidenced.

    Received 7 Sep, published by the council 14 Sep 2026 Lawful development
  • 26/06044/CLOPUD Awaiting decision

    9 Abinger Mews W9 3SP

    Proposed loft conversion with rear dormer and 3 front rooflights to existing mid-terraced house.

    Received 3 Sep, published by the council 11 Sep 2026 Lawful development
  • 26/06035/CLOPUD Awaiting decision

    30 Ashworth Road W9 1JY

    Erection of new garden retaining wall and erection of new garden timber fence to match the height of existing fence.

    Received 3 Sep, published by the council 11 Sep 2026 Lawful development
  • 26/05871/CLEUD Awaiting decision

    32 Cambridge Street London SW1V 4QH

    Confirmation of the lawful implementation of planning permission dated 13 August 2021 (RN: 21/04143/FULL) has commenced before the expiry of the three year time period and may, therefore, lawfully be carried out and completed.

    Received 27 Aug, published by the council 4 Sep 2026 Lawful development