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Planning application

8 Montagu Mews West London W1H 2EE

Awaiting decision Westminster 26/03228/FULL Full Planning Permission Application

Works: Extension

Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.

Proposal

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

As published by the council, reference 26/03228/FULL

Application record

Reference
26/03228/FULL
Type
Full Planning Permission Application
Status
Pending
Received
15 May 2026
Validated
15 May 2026
Ward
Marylebone
Postcode
W1H 2EE

Timeline

Dates from the published record

  1. 15 May 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 10 July 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.

    Westminster took a median of 91 days over the applications it decided in the last year.

Who's behind it

Company information only, from the register and Companies House

SM Planning Ltd Agent, a planning consultancy

114 applications on PlanIndex · across 24 councils · 81% granted

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

28 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.

Open the documents

What happens while it is decided

This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 119 days. More in our guide to how long planning decisions take.

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

  • 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

  • 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

  • Flat 2 5 Bryanston Square London W1H 2DH

    25/07257/FULL Submitted 7 Oct 2025 50 yards away

    Internal alterations including repair, refurbishment and repainting of the windows and french windows; refurbishment of balconies and railings; and other associated works. (Linked with 25/07211/LBC)

    Granted Full applications Windows or glazing 19 docs

  • Flat 2 5 Bryanston Square London W1H 2DH

    25/07211/LBC Submitted 6 Oct 2025 50 yards away

    Internal alterations including replacement of windows and French Windows; refurbishment of balconies and railings; and other associated works. (Linked with 25/07257/FULL)

    Granted Heritage and listed buildings Windows or glazing 17 docs

  • Flat 1 49 Montagu Square London W1H 2LW

    25/05705/FULL 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 25/05706/LBC)

    Granted Full applications Windows or glazing 24 docs

  • 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

In Westminster

  • 26/07528/FULL Awaiting decision

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    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