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Planning application

Top Floor Flat 71 Randolph Avenue London W9 1DW

Granted Westminster 25/07830/FULL Full Planning Permission Application

Works: Loft or dormer Windows or glazing

Relates to 25/07831/LBC

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

Proposal

Replacement of existing casement windows to the two front dormer windows at fourth floor level with new timber sliding sash windows. (Linked with 25/07831/LBC)

As published by the council, reference 25/07830/FULL

Application record

Reference
25/07830/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Application Permitted
Received
29 Oct 2025
Validated
29 Oct 2025
Decided
16 Feb 2026
Ward
Little Venice
Decision by
Delegated Decision
Postcode
W9 1DW

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025: 2 approved, 1 refused.

  • 25/07831/LBC Granted

    Top Floor Flat 71 Randolph Avenue London W9 1DW

    Replacement of existing casement windows to the two front dormer windows at fourth floor level with new timber sliding sash windows. (Linked with 25/07830/FULL)

    Decided 16 Feb 2026 Heritage and listed buildings
  • 25/06214/NMA Refused

    Top Floor Flat 71 Randolph Avenue London W9 1DW

    Amendments to planning permission dated 20th December 2024 (RN: 24/07825/FULL) for the reconfiguring the internal staircase and layout, expanding and relocating the existing rear mansard window and door to terrace and adding two conservation-style rooflights to the rear slope of the existing roof. NAMELY, to replace two existing casement windows on the front facade at fourth-floor level with sash windows.

    Decided 29 Sep 2025 Amendments

Timeline

Dates from the published record

  1. 29 Oct 2025

    Received by Westminster

  2. 16 Feb 2026

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/07831/LBC Granted

    Top Floor Flat 71 Randolph Avenue London W9 1DW

    Replacement of existing casement windows to the two front dormer windows at fourth floor level with new timber sliding sash windows. (Linked with 25/07830/FULL)

    Decided 16 Feb 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/07831/LBC Granted

    Top Floor Flat 71 Randolph Avenue London W9 1DW

    Replacement of existing casement windows to the two front dormer windows at fourth floor level with new timber sliding sash windows. (Linked with 25/07830/FULL)

    Decided 16 Feb 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Syte Architects Ltd Agent, an architecture practice registered in London

Active · incorporated 2002 · London

15 applications on PlanIndex · across 4 councils · 87% granted

Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.

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Documents

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

16 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 16 February 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 500 metres

  • Top Floor Flat 71 Randolph Avenue London W9 1DW

    25/07831/LBC Submitted 29 Oct 2025 0m away

    Replacement of existing casement windows to the two front dormer windows at fourth floor level with new timber sliding sash windows. (Linked with 25/07830/FULL)

    Granted Heritage and listed buildings Loft or dormer Windows or glazing 3 docs

  • Top Floor Flat 71 Randolph Avenue London W9 1DW

    25/06214/NMA Submitted 2 Sep 2025 2m away

    Amendments to planning permission dated 20th December 2024 (RN: 24/07825/FULL) for the reconfiguring the internal staircase and layout, expanding and relocating the existing rear mansard window and door to terrace and adding two conservation-style rooflights to the rear slope of the existing roof. NAMELY, to replace two existing casement windows on the front facade at fourth-floor level with sash windows.

    Refused Amendments Loft or dormer Windows or glazing 9 docs

  • Flat 3 61 Randolph Avenue London W9 1DW

    25/07782/ADLBC Submitted 28 Oct 2025 2m away

    Detailed drawings of the windows pursuant to condition 3 of listed building consent dated 19th September 2025 (RN: 25/05295/LBC).

    Refused Conditions Windows or glazing 9 docs

  • Flat 3 61 Randolph Avenue London W9 1DW

    25/08789/ADLBC Submitted 3 Dec 2025 2m away

    Details of changes to windows pursuant to condition 3 of listed building consent dated 18 September 2025 (RN: 25/05295/LBC)

    Granted Conditions Windows or glazing 3 docs

  • Basement Flat 77 Randolph Avenue London W9 1DW

    20/04840/FULL Submitted 31 Jul 2020 21m away

    Alterations to front lightwell including alteration to stairs, railings, windows and doors and infill under front entrance bridge. (Linked to 20/07041/LBC).

    Granted Full applications Extension Windows or glazing 31 docs

  • Flat 2 61 Randolph Avenue London W9 1DW

    25/07766/LBC Submitted 27 Oct 2025 40m away

    Proposed upgrading of windows within the front elevation of the lower ground floor level flat and installation of an air source heat pump, the replacement of the kitchen window with a door within the existing opening and minimal internal alterations and new floor finishes. (Linked to 25/07765/FULL)

    Granted Heritage and listed buildings Windows or glazing 35 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront.

    15 Sep 2026 Full applications
  • 26/06297/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

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

    15 Sep 2026 Full applications
  • 26/06234/FULL Awaiting decision

    40 Grosvenor Place London SW1X 7HJ

    Use of lower ground floor of Unit 3 and ground floor of Unit 2 as gym (Class E(d)) and/ or office (Class E(g))

    11 Sep 2026 Full applications
  • 26/06249/FULL Awaiting decision

    53 Wimpole Street London W1G 8YH

    Removal and Installation of external rear air condensers and associated pipe work to ground floor, including internal works to ground and first floor. (Linked with 26/06250/LBC)

    11 Sep 2026 Full applications
  • 26/03576/FULL Decided

    15A Devonshire Terrace London W2 3DW

    Erection of an infill extension to basement courtyard to form new bedroom and internal alterations. (Linked with 26/03577/LBC)

    1 Jun 2026 Full applications