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Planning application

4 Mansfield Mews London W1G 9NL

Withdrawn Westminster 25/05099/FULL Full Planning Permission Application

Works: Roofing Windows or glazing

Relates to 25/05100/LBC

Withdrawn before a decision, so it carries no planning weight. A revised scheme can be submitted at any time.

Proposal

Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation of roof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked with 25/05100/LBC)

As published by the council, reference 25/05099/FULL

Application record

Reference
25/05099/FULL
Type
Full Planning Permission Application
Status
Withdrawn
Decision
Withdrawn As published: Application Withdrawn
Received
22 Jul 2025
Validated
31 Jul 2025
Decided
1 Oct 2025
Ward
Marylebone
Postcode
W1G 9NL

Site history

Applications at this address on the Westminster register

This site has had 4 applications since 2025: 2 approved, 0 refused.

  • 25/08604/LBC Granted

    4 Mansfield Mews London W1G 9NL

    Replacement of garage door with smaller size door; internal layout alterations; and associated works. (Linked with 25/08603/FULL)

    Decided 24 Apr 2026 Heritage and listed buildings
  • 25/08603/FULL Granted

    4 Mansfield Mews London W1G 9NL

    Replacement of garage door with smaller size door; internal layout alterations; and associated works. (Linked with 25/08604/LBC)

    Decided 24 Apr 2026 Full applications
  • 25/05100/LBC Withdrawn

    4 Mansfield Mews London W1G 9NL

    Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation ofr oof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked to 25/05099/FULL)

    Decided 1 Oct 2025 Heritage and listed buildings

Timeline

Dates from the published record

  1. 22 Jul 2025

    Received by Westminster

  2. 31 Jul 2025

    Validated

    Checked as complete and ready for consideration.

  3. 1 Oct 2025

    Decision issued: Application Withdrawn

  4. 21 Jul 2026

    Added to PlanIndex

Cases linked to this one on the register

  • 25/05100/LBC Withdrawn

    4 Mansfield Mews London W1G 9NL

    Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation ofr oof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked to 25/05099/FULL)

    Decided 1 Oct 2025 Heritage and listed buildings

1 later application on the register refers to this one:

  • 25/05100/LBC Withdrawn

    4 Mansfield Mews London W1G 9NL

    Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation ofr oof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked to 25/05099/FULL)

    Decided 1 Oct 2025 Heritage and listed buildings

Who's behind it

Company information only, from the register and Companies House

Giles Quarme Architects Ltd Agent, an architecture practice registered in London

Active · incorporated 2019 · London

22 applications on PlanIndex · across 5 councils · 100% 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

20 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 withdrawal means

The applicant withdrew this application before Westminster decided it, and is free to submit a revised scheme at any time. 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

  • 4 Mansfield Mews London W1G 9NL

    25/08604/LBC Submitted 25 Nov 2025 50 yards away

    Replacement of garage door with smaller size door; internal layout alterations; and associated works. (Linked with 25/08603/FULL)

    Granted Heritage and listed buildings 12 docs

  • 4 Mansfield Mews London W1G 9NL

    25/08603/FULL Submitted 25 Nov 2025 50 yards away

    Replacement of garage door with smaller size door; internal layout alterations; and associated works. (Linked with 25/08604/LBC)

    Granted Full applications 14 docs

  • 4 Mansfield Mews London W1G 9NL

    25/05100/LBC Submitted 22 Jul 2025 50 yards away

    Partial removal of existing roof to create new roof terrace, accessible via a new stair with 0.9m balustrade perimeter; new glazed screen to courtyard; new window to the South Elevation; replacement of external door with a window at south elevation; re-covering and reinsulation ofr oof pitch on the Mews road elevation; modifications to the Mews Elevation and the creation of an internal bin store; and internal alterations to create a new double-height living space and reconfiguring the layout to incorporate one bedroom, a kitchen, a shower room, and a WC. (Linked to 25/05099/FULL)

    Withdrawn Heritage and listed buildings Roofing Windows or glazing 25 docs

  • Orbis House 5 Mansfield Street London W1G 9NG

    25/08080/CLEUD Submitted 6 Nov 2025 50 yards away

    Confirmation that the material change of use from office to use as a single family dwelling house under planning permission (RN 12/09926/FULL) has taken place and that use as a single family dwelling house is now the building's lawful use.

    Granted Lawful development 25 docs
    Domestic

  • Orbis House 5 Mansfield Street London W1G 9NG

    26/00954/ADFULL Submitted 16 Feb 2026 50 yards away

    Detailed specifications, and drawings at 1:10 with full size details, of refurbishment works to the windows, and of detailed drawings at 1: 10 with full size sections through the glazing bars of the new sash windows and French windows pursuant to condition 6 of planning permission dated 5th September 2024 (RN:24/01895/FULL)

    Granted Full applications Windows or glazing 41 docs

  • Orbis House 5 Mansfield Street London W1G 9NG

    26/00940/ADLBC Submitted 16 Feb 2026 50 yards away

    Detailed specifications, and drawings at 1:10 with full size details, of refurbishment works to the windows, and of detailed drawings at 1: 10 with full size sections through the glazing bars of the new sash windows and French windows pursuant to Condition 6 of Listed Building Consent 05 September 2024 (RN24/01896/LBC)

    Granted Conditions Windows or glazing 20 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