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Planning application

40 Leith Mansions Grantully Road London W9 1LH

Granted Westminster 25/07664/FULL Full Planning Permission Application

Works: Windows or glazing

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

Proposal

Replacement of existing windows, including sash windows, to the front, side, and rear elevations with new timber sash and timber casement windows, all to be installed within the existing structural openings.

As published by the council, reference 25/07664/FULL

Application record

Reference
25/07664/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
22 Oct 2025
Validated
3 Nov 2025
Decided
12 Feb 2026
Ward
Maida Vale
Decision by
Delegated Decision
Postcode
W9 1LH

Timeline

Dates from the published record

  1. 22 Oct 2025

    Received by Westminster

  2. 3 Nov 2025

    Validated

    Checked as complete and ready for consideration.

  3. 12 Feb 2026

    Decision issued: Application Permitted

  4. 21 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

CDJM Architects Agent, an architecture practice registered in London

Active · incorporated 2020 · London

3 applications on PlanIndex · across 3 councils

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

18 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 12 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 0.3 miles

  • 87 Leith Mansions Grantully Road London W9 1LJ

    22/04240/FULL Submitted 28 Jun 2022 100 yards away

    Replacement of the external doors and windows with new timber double glazed units to flat located at third floor level.

    Granted Full applications Windows or glazing 8 docs

  • 100 Leith Mansions Grantully Road London W9 1LJ

    26/04875/FULL Submitted 21 Jul 2026 100 yards away

    87% historically approved · decision due ~28 Sep

    Replacement of windows and door at rear first floor level.

    Decided Full applications Windows or glazing

  • Flats 89 To 96 Leith Mansions Grantully Road London W9 1LJ

    26/05279/FULL Submitted 4 Aug 2026 100 yards away

    87% historically approved · decision due ~29 Sep

    Installation of gas pipeworks. (Retrospective)

    Awaiting decision Full applications

  • Flats 50 To 59 Biddulph Mansions Elgin Avenue London W9 1HT

    07/03218/FULL Submitted 10 Apr 2007 100 yards away

    Creation of one bedroom flat at lower ground floor store rooms at rear of flats 50-59 and installation of new windows and doors.

    Granted Full applications New dwelling Windows or glazing 10 docs

  • Biddulph Mansions Elgin Avenue London W9 1HT

    10/04418/TCA Submitted 19 May 2010 100 yards away

    Cherry tree to be removed and replanted.

    Withdrawn Trees 3 docs

  • 7 Biddulph Road London W9 1JA

    26/00864/TCA Submitted 12 Feb 2026 150 yards away

    100% historically approved · decision due ~9 Apr

    T1- Sycamore tree- crown reduction back to most recent pruning points (approximately 2.5m reduction).

    Awaiting decision Trees 6 docs

In Westminster

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

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

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06222/FULL Awaiting decision

    42 - 49 St Martin's Lane London WC2N 4EJ

    Entrance alterations, illuminated fascia sign to St Martins Lane entrance and glazed openings for digital signage

    Received 11 Sep, published by the council 21 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))

    Received 11 Sep, published by the council 18 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)

    Received 11 Sep, published by the council 18 Sep 2026 Full applications