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Planning application

3 Great Cumberland Mews London W1H 7DZ

Granted Westminster 25/08713/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

Conversion of the existing ground-floor garage into habitable residential accommodation; enlargement of the rear window in the existing utility room; and installation of air conditioning unit at rear ground floor patio.

As published by the council, reference 25/08713/FULL

Application record

Reference
25/08713/FULL
Type
Full Planning Permission Application
Status
Decided
Decision
Granted As published: Application Permitted
Received
28 Nov 2025
Validated
15 Jan 2026
Decided
16 Apr 2026
Ward
Marylebone
Decision by
Delegated Decision
Postcode
W1H 7DZ

Site history

Applications at this address on the Westminster register

This site has had 3 applications since 2025: 1 approved, 0 refused.

  • 26/02789/ADFULL Awaiting decision

    3 Great Cumberland Mews London W1H 7DZ

    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 7 of planning permission dated 16th April 2026 (RN:25/08713/FULL)

    Submitted 27 Apr 2026 Full applications
  • 26/02789/FULL Awaiting decision

    3 Great Cumberland Mews London W1H 7DZ

    Removal of Condition 7 of planning permission dated 16th April 2026 (RN: 25/08713/FULL) to remove the requirement to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site.

    Submitted 27 Apr 2026 Full applications

Timeline

Dates from the published record

  1. 28 Nov 2025

    Received by Westminster

  2. 15 Jan 2026

    Validated

    Checked as complete and ready for consideration.

  3. 16 Apr 2026

    Decision issued: Application Permitted

  4. 20 Jul 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Vernon Architects Agent, an architecture practice registered in London

Active · incorporated 2014 · London

7 applications on PlanIndex · across 2 councils

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

13 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 16 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

  • 3 Great Cumberland Mews London W1H 7DZ

    26/02789/ADFULL Submitted 27 Apr 2026 50 yards away

    88% historically approved · decision due ~22 Jun

    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 7 of planning permission dated 16th April 2026 (RN:25/08713/FULL)

    Awaiting decision Full applications 5 docs

  • 3 Great Cumberland Mews London W1H 7DZ

    26/02789/FULL Submitted 27 Apr 2026 50 yards away

    88% historically approved · decision due ~5 Jul

    Removal of Condition 7 of planning permission dated 16th April 2026 (RN: 25/08713/FULL) to remove the requirement to secure measures to mitigate the potential increased demand for on-street residents car parking in the vicinity of the site.

    Awaiting decision Full applications 9 docs

  • 15 Great Cumberland Mews London W1H 7DZ

    07/10558/ADFULL Submitted 4 Dec 2007 50 yards away

    Details of waste and recyclables storage pursuant to Condition 5 of planning permission dated 26 July 2006 (RN: 06/03803).

    Granted Full applications 5 docs

  • 15 Great Cumberland Mews London W1H 7DZ

    07/07799/ADFULL Submitted 5 Sep 2007 50 yards away

    Windows pursuant to Condition 3 of planning permission dated 26 July 2007 (RN: 06/03803).

    Granted Full applications Windows or glazing 3 docs

  • 15 Great Cumberland Mews London W1H 7DZ

    06/03803/FULL Submitted 16 May 2006 50 yards away

    Change of use to provide two self contained flats, external alterations including insertion of window at ground floor front elevation and construction of an external stair.

    Granted Full applications New dwelling Windows or glazing 10 docs

  • 22 Seymour Place London W1H 7NJ

    25/06754/FULL Submitted 19 Sep 2025 50 yards away

    Retention of the existing extract duct with brick cladding and associated fans, and duct attenuation, along with the installation of three AC units within an acoustic enclosure at the rear ground-floor roof level.

    Granted Full applications 26 docs

In Westminster

  • 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
  • 26/07470/FULL Awaiting decision

    12 Queen Anne's Gate London SW1H 9AA

    Excavation of single-storey basement. (Linked with 26/07471/LBC).

    Received 3 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07466/FULL Awaiting decision

    65 Albion Gate Albion Street W2 2LA

    Replacement of first-floor front elevation windows and balcony door with double-glazed steel-framed units.

    Received 3 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07460/FULL Awaiting decision

    1 Hanover Square London W1S 1HA

    Installation of new public art sculptures and seating; hard and soft landscaping; installation of an area of raised terrace decking on St George Street measuring 43m x 2.6m for the placing of tables, chairs and banquette benches in connection with restaurant use; and associated external alterations and enabling works.

    Received 3 Nov, published by the council 5 Nov 2026 Full applications
  • 26/07451/FULL Awaiting decision

    Flat 1 31 South Audley Street London W1K 2PG

    Replacement of windows, Installation of an external condenser to the rear elevation including Internal refurbishment. (linked with 26/07452/LBC)

    Received 2 Nov, published by the council 4 Nov 2026 Full applications