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Planning application

15 - 16 Montagu Mews South London W1H 7ET

Granted Westminster 26/00330/FULL Full Planning Permission Application

Works: Loft or dormer Windows or glazing

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

Proposal

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.

As published by the council, reference 26/00330/FULL

Application record

Reference
26/00330/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
20 Jan 2026
Validated
20 Jan 2026
Decided
7 May 2026
Ward
Marylebone
Decision by
Delegated Decision
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.

  • 26/03608/ADFULL Awaiting decision

    15 - 16 Montagu Mews South London W1H 7ET

    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).

    Submitted 2 Jun 2026 Full applications

Timeline

Dates from the published record

  1. 20 Jan 2026

    Received by Westminster

  2. 7 May 2026

    Decision issued: Application Permitted

  3. 21 Jul 2026

    Added to PlanIndex

Documents

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

25 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 this grant of permission means

Westminster granted permission on 7 May 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

  • 21 Montagu Mews South London W1H 7ES

    25/09359/FULL Submitted 24 Dec 2025 50 yards away

    88% historically approved · decision due ~21 May

    Infill of existing light well to first floor at the rear, roof alterations including new conservation style roof lights and photovoltaic panels to the rear slope of the roof. Alterations to the front façade including the installation of new double doors with window over and removal metal bar to ground floor windows and installation of double glazed vacuum glazed double glazing within existing window units.

    Awaiting decision Full applications Extension Loft or dormer +2 34 docs

  • 11 Montagu Mews South London W1H 7ER

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

    88% 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

  • 3 Brunswick Mews London W1H 7FB

    25/07709/ADFULL Submitted 24 Oct 2025 50 yards away

    Details of appropriate arrangements to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site pursuant to condition 3 of planning permission dated 5th February 2025 (RN:24/08126/FULL)

    Withdrawn Full applications 19 docs

  • 3 Brunswick Mews London W1H 7FB

    25/07695/ADFULL Submitted 23 Oct 2025 50 yards away

    Details of secure cycle storage for the residential (Class C3) use pursuant to condition 4 of planning permission dated 5th February 2025 (RN:24/08126/FULL)

    Withdrawn Full applications 11 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

  • 22 Montagu Mews South London W1H 7ES

    04/09798/FULL Submitted 10 Dec 2004 50 yards away

    Demolition of roof and replacement with extended roof and infill of rear lightwell.

    Granted Full applications Extension Demolition 9 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