cs:westminster:26/05749/LBCPlanning Application cs:westminster:26/05749/LBC

Planning application at Roxburghe House 273 - 287 Regent Street London W1B 2HA, Westminster. View planning documents, track the decision and get email alerts on updates.

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Refurbishment and extension of Roxburghe House and (unlisted) 39 and 40 Margaret Street, including new stair and lift core extension, UKPN substation and creation of localised openings in party walls to link the buildings; replacement of windows; internal and external improvements to upgrade the existing building fabric and introduction of core extension and plant enclosures at roof level of the buildings; facade cleaning; and associated ancillary works. At Roxburghe House: creation of rooftop terrace and pavilion; alterations to entrances; and lowering of some roof level windows. At Margaret Street (unlisted): replacement of ground floor slab, upward extension of the building and chimneys to provide an additional floor, plus creation of a roof terrace and pavilion at level 05; a new office entrance with glazed frontage, extension behind rear façade; and associated ancillary works. (Linked with 26/05748/FULL)

26/05749/LBC

Roxburghe House 273 - 287 Regent Street London W1B 2HA

SubmittedSubmitted21 Aug

ValidatedValidated

ConsultationConsultation

TargetTarget Date

DecidedDecided

This is a planning application for an extension at Roxburghe House 273 - 287 Regent Street London W1B 2HA. Westminster has handled 18,803 applications of this type and approves 88% of them, typically deciding them in 56 days. It was submitted on 21 August 2026 and is still awaiting a decision. The site is in the Regent Street conservation area, with 9 listed buildings nearby. There has been 1 other application at this address. We hold 214 applications in total for the W1B postcode area.