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Planning application

Flat 45 2 Mansfield Street London W1G 9NF

Awaiting decision Westminster 26/02044/FULL Full Planning Permission Application

Works: Extension 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

Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02045/LBC)

As published by the council, reference 26/02044/FULL

Application record

Reference
26/02044/FULL
Type
Full Planning Permission Application
Status
Pending
Received
27 Mar 2026
Validated
27 Mar 2026
Ward
Marylebone
Postcode
W1G 9NF

Site history

Applications at this address on the Westminster register

This site has had 2 applications since 2026.

  • 26/02045/LBC Awaiting decision

    Flat 45 2 Mansfield Street London W1G 9NF

    Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02044/FULL)

    Submitted 27 Mar 2026 Heritage and listed buildings

Timeline

Dates from the published record

  1. 27 Mar 2026

    Received by Westminster

  2. 21 Jul 2026

    Added to PlanIndex

  3. Decision

    Awaiting decision

    Decision expected by 22 May 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

Lucy Wood Architects Agent, an architecture practice registered in London

Active · incorporated 2018 · London

48 applications on PlanIndex · across 9 councils · 87% 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

12 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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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

  • Flat 45 2 Mansfield Street London W1G 9NF

    26/02045/LBC Submitted 27 Mar 2026 50 yards away

    90% historically approved · decision due ~22 May

    Roof extension to the existing mansard roof with associated elevational alterations on the Duchess Street and Rear Elevation, alterations to the existing mansard roof on the Mansfield Street Elevation including a new dormer window and the replacement of the existing external doors, two new rooflights at main roof level, installation of two external air conditioning (AC) condensers at main roof level, replacement of existing rooflights and windows, installation of new external cupboard at terrace level and internal reconfigurations throughout. (Linked with 26/02044/FULL)

    Awaiting decision Heritage and listed buildings Extension Loft or dormer +1 1 doc

  • Flat 10 2 Mansfield Street London W1G 9NF

    26/01152/LBC Submitted 24 Feb 2026 50 yards away

    90% historically approved · decision due ~8 Jun

    Re-location of previously approved external air conditioning unit at roof level. Linked with 26/01151/FULL

    Withdrawn Heritage and listed buildings 14 docs

  • Flat 49 2 Mansfield Street London W1G 9NF

    26/01207/LBC Submitted 25 Feb 2026 50 yards away

    90% historically approved · decision due ~29 Jul

    Replacement of seven windows.

    Decided Heritage and listed buildings Windows or glazing 15 docs

  • Flat 16 2 Mansfield Street London W1G 9NF

    22/01316/LBC Submitted 24 Feb 2022 50 yards away

    Replacement windows and door to the rear elevation.

    Granted Heritage and listed buildings Windows or glazing 12 docs

  • Flat 43 2 Mansfield Street London W1G 9NF

    26/00589/FULL Submitted 2 Feb 2026 50 yards away

    88% historically approved · decision due ~12 May

    Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00590/LBC)

    Awaiting decision Full applications 22 docs

  • Flat 43 2 Mansfield Street London W1G 9NF

    26/00590/LBC Submitted 2 Feb 2026 50 yards away

    90% historically approved · decision due ~12 May

    Installation of external air conditioning unit at roof level and associated cabling and pipework. (Linked with 26/00589/FULL)

    Awaiting decision Heritage and listed buildings 2 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