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Planning application

25/08992/CLOPUD

20 Hertford Street London W1J 7RX

Withdrawn Westminster Certificate of Lawfulness (proposed)

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

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    Decision issued: Application Withdrawn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

What withdrawal means

The process from here

The applicant withdrew this application before the council decided it, so it carries no planning weight and no fee refund is automatic. Withdrawal often follows officer feedback that a refusal was likely.

The applicant is free to submit a revised application at any time, and many withdrawn schemes return in amended form, so the site is worth watching if the proposal affected you.

About lawful development applications

How this application type works

A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.

More on lawful development applications in our guide

Nearby applications

Within 500 metres

  • 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.

    2 Dec 2025 0m away Full applications
  • 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.

    13 Feb 2026 1m away Full applications
  • 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)

    29 Oct 2025 25m away 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)

    29 Oct 2025 25m away 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)

    22 May 2026 25m away Full applications
  • 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)

    22 May 2026 25m away Heritage and listed buildings

In Westminster

  • 26/04958/CLEUD Awaiting decision

    1 Sussex Square London W2 2SJ

    Use of a building as mixed use as C3 (single residential dwelling) and C1 (short-stay accommodation)

    24 Jul 2026 Lawful development
  • 26/04971/CLOPUD Awaiting decision

    Flat 23 192 Emery Hill Street London SW1P 1PN

    Replacement of the existing single-glazed moving window sashes, casement panels, and balcony door leaves with slimline double-glazed timber units. The existing outer timber frames fixed into the building will be retained and will not be removed or altered. The replacement units will match the existing windows in material, design, glazing bar pattern, opening method, dimensions, and external appearance. No alterations are proposed to the building structure, external walls, openings, or window frame sizes. No new access, alterations to existing access, new streets, hardstandings, means of enclosure, or drainage works are proposed. The precise location and details of the replacement windows are shown on the accompanying drawings.

    24 Jul 2026 Lawful development
  • 26/04832/CLEUD Awaiting decision

    Basement Flat 117 Kilburn Park Road London NW6 5LB

    Use or Development in respect of the detached single-storey outbuilding within the rear garden of the applicants property.

    20 Jul 2026 Lawful development
  • 26/04856/CLOPUD Awaiting decision

    Flat 15 192 Emery Hill Street London SW1P 1PN

    Replacement of the existing single-glazed moving sashes, casement panels, and balcony door leafs with slimline double glazed timber units within the fully retained existing external timber frames.

    20 Jul 2026 Lawful development
  • 26/04632/CLOPUD Awaiting decision

    165 Oliphant Street London W10 4EA

    Installation of solar panels to generate clean, renewable energy from sunlight and reduce reliance on grid electricity and fossil fuels.

    10 Jul 2026 Lawful development