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Planning application

15 - 16 Montagu Mews South London W1H 7ET

Awaiting decision Westminster 26/03608/ADFULL Approval of Details (Full PP)

Works: Loft or dormer Windows or glazing

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

Proposal

Details of all new windows, omission of the rooflight to the front roof slope conservation rooflight and main door pursuant to conditions 4, 5 and 6 of planning permission dated 7th May 2026 (RN:26/00330).

As published by the council, reference 26/03608/ADFULL

Application record

Reference
26/03608/ADFULL
Type
Approval of Details (Full PP)
Status
Pending
Received
2 Jun 2026
Validated
2 Jun 2026
Ward
Marylebone
Postcode
W1H 7ET

Site history

Applications at this address on the Westminster register

This site has had 2 applications since 2026: 1 approved, 0 refused.

  • 26/00330/FULL Granted

    15 - 16 Montagu Mews South London W1H 7ET

    Conversion of the existing ground-floor garage into habitable residential accommodation, replacement of existing windows and doors with double glazing, replacement of existing garage doors with new windows and installation of new rooflights.

    Decided 7 May 2026 Full applications

Timeline

Dates from the published record

  1. 2 Jun 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 28 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 66 days over the applications it decided in the last year.

Documents

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

8 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 91 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

  • 11 Montagu Mews South London W1H 7ER

    26/03408/FULL Submitted 22 May 2026 50 yards away

    87% historically approved · decision due ~17 Jul

    Installation of replacement existing windows with double glazed units to improve the thermal performance of the property.

    Awaiting decision Full applications Windows or glazing 8 docs

  • 26 Montagu Mews South London W1H 7ES

    25/05187/FULL Submitted 25 Jul 2025 50 yards away

    Replacement of garage doors with timber windows.

    Granted Full applications Windows or glazing 14 docs

  • Flat 2 13 Montagu Street London W1H 7EX

    25/04425/FULL Submitted 27 Jun 2025 50 yards away

    Installation of airbrick to front elevation, new secondary glazing, reconfiguration, acoustic flooring and fixtures and fittings throughout. (Linked with 25/04426/LBC)

    Granted Full applications Windows or glazing 31 docs

  • Flat 2 13 Montagu Street London W1H 7EX

    25/04426/LBC Submitted 27 Jun 2025 50 yards away

    Installation of airbrick to front elevation, new secondary glazing, reconfiguration, acoustic flooring and fixtures and fittings throughout. (Linked with 25/04425/FULL)

    Granted Heritage and listed buildings Windows or glazing 29 docs

  • 15 - 16 Montagu Mews South London W1H 7ET

    26/00330/FULL Submitted 20 Jan 2026 50 yards away

    Conversion of the existing ground-floor garage into habitable residential accommodation, replacement of existing windows and doors with double glazing, replacement of existing garage doors with new windows and installation of new rooflights.

    Granted Full applications Loft or dormer Windows or glazing 25 docs

  • 22 Montagu Mews South London W1H 7ES

    04/09799/CAC Submitted 10 Dec 2004 50 yards away

    Demolition of roof, part rear elevation, internal partitions and floors.

    Granted Heritage and listed buildings Demolition 2 docs

In Westminster

  • 26/06295/FULL Awaiting decision

    15 Warwick Way London SW1V 1QT

    Installation of a new shopfront with Medication Dispensing Outlet.

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

    15 Warwick Way London SW1V 1QT

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

    Received 15 Sep, published by the council 17 Sep 2026 Full applications
  • 26/06294/FULL Awaiting decision

    15 Eaton Mews South London SW1W 9HP

    Installation of railings and sliding lantern light at main roof level in connection with the use of the roof as a terrace.

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06317/FULL Awaiting decision

    124 Hamilton Terrace London NW8 9UT

    Replacement of existing first-floor sash windows to the front and rear elevations with traditionally detailed painted timber, slim-profile double-glazed sash windows. (Linked to 26/06318/LBC)

    Received 15 Sep, published by the council 22 Sep 2026 Full applications
  • 26/06273/FULL Awaiting decision

    9A Grosvenor Square London W1K 5AE

    Installation of natural Portland Stone paving to two front entrances. (Linked to 26/05473/LBC)

    Received 14 Sep, published by the council 22 Sep 2026 Full applications