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Planning application

Flat 1 49 Montagu Square London W1H 2LW

Granted Westminster 25/05705/FULL Full Planning Permission Application

Works: Windows or glazing

Relates to 25/05706/LBC

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

Proposal

Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05706/LBC)

As published by the council, reference 25/05705/FULL

Application record

Reference
25/05705/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
14 Aug 2025
Validated
15 Sep 2025
Decided
22 Apr 2026
Ward
Marylebone
Decision by
Delegated Decision
Postcode
W1H 2LW

Site history

Applications at this address on the Westminster register

This site has had 2 applications since 2025: 2 approved, 0 refused.

  • 25/05706/LBC Granted

    Flat 1 49 Montagu Square London W1H 2LW

    Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05705/FULL)

    Decided 22 Apr 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 14 Aug 2025

    Received by Westminster

  2. 15 Sep 2025

    Validated

    Checked as complete and ready for consideration.

  3. 22 Apr 2026

    Decision issued: Application Permitted

  4. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/05706/LBC Granted

    Flat 1 49 Montagu Square London W1H 2LW

    Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05705/FULL)

    Decided 22 Apr 2026 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/05706/LBC Granted

    Flat 1 49 Montagu Square London W1H 2LW

    Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05705/FULL)

    Decided 22 Apr 2026 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

PS Facades Ltd Agent

2 applications on PlanIndex

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

See their track record

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.

Watch members (£5 a month) open the document list from here.

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What this grant of permission means

Westminster granted permission on 22 April 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

  • Flat 1 49 Montagu Square London W1H 2LW

    25/05706/LBC Submitted 14 Aug 2025 50 yards away

    Replacement of existing single glazed sash timber windows and frames with new double glazed sash timber windows and frames - 5 windows on the front elevation. (Linked with 25/05705/FULL)

    Granted Heritage and listed buildings Windows or glazing 20 docs

  • 50 Montagu Square London W1H 2LW

    26/04360/LBC Submitted 1 Jul 2026 50 yards away

    90% historically approved · decision due ~26 Aug

    Replacement of areas of roof covering with slate tiles to match existing, and replacement of localised areas of flashing to the roof.

    Awaiting decision Heritage and listed buildings Roofing

  • Flat 3 54 Montagu Square London W1H 2LP

    26/05923/LBC Submitted 31 Aug 2026 50 yards away

    90% historically approved · decision due ~2 Nov

    Internal layout alterations and associated works.

    Decided Heritage and listed buildings

  • 9 Montagu Mews West London W1H 2EE

    26/02315/FULL Submitted 8 Apr 2026 50 yards away

    88% historically approved · decision due ~10 Jun

    Installation of air conditioning condenser unit and acoustic enclosure to roof.

    Awaiting decision Full applications 23 docs

  • 8 Montagu Mews West London W1H 2EE

    26/03228/FULL Submitted 15 May 2026 50 yards away

    88% historically approved · decision due ~10 Jul

    Roof extension, installation of air conditioning unit in an acoustic enclosure, alterations to the front and rear facades and associated works.

    Awaiting decision Full applications Extension 28 docs

  • Ellerton House 11 Bryanston Square London W1H 2DQ

    25/07173/FULL Submitted 6 Oct 2025 50 yards away

    Replacement of the existing timber pergola over the rear terrace with new. Linked with 25/07174/LBC (Retrospective)

    Granted Full applications 14 docs

In Westminster

  • 26/07528/FULL Awaiting decision

    69 Eaton Place London SW1X 8DF

    Installation of new cast iron water pipe on rear courtyard elevation. (Linked with 26/07529/LBC)

    Received 5 Nov, published by the council 6 Nov 2026 Full applications
  • 26/05200/FULL Decided

    1 The Court House 165 Seymour Place London W1H 4PU

    Installation of waterproofing system to the existing lead flat roofs

    Received 3 Aug, published by the council 28 Aug 2026 Full applications
  • 26/07521/FULL Awaiting decision

    Flat 18 Harlequin Court 20 Tavistock Street London WC2E 7NZ

    Installation of one external condenser unit

    Received 4 Nov, published by the council 6 Nov 2026 Full applications
  • 26/07508/FULL Awaiting decision

    Buckingham Palace The Mall London SW1A 1AA

    Replacement of existing security lighting to the Buckingham Palace Forecourt with 80 compact LED spotlights installed within the lantern clusters across 10 principal piers, with associated concealed cabling and reversible fixings. (Linked with 26/07509/LBC)

    Received 4 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07472/FULL Awaiting decision

    Flat 3 82 New Cavendish Street London W1G 9TA

    Replacement windows to second floor level with vacuum, double glazing windows. (Linked with 26/07473/LBC)

    Received 3 Nov, published by the council 6 Nov 2026 Full applications