Norwood Investors has submitted plans for the redevelopment of Templar House on High Holborn, WC1, into a major mixed-use building.
The Astudio designed scheme will see the existing 1959-built office block at 81-87 High Holborn demolished and replaced with a substantially larger modern office and residential development.
The scheme proposes increasing the gross floor area of the building from 112,741 sq ft to 245,568 sq ft, an increase of 132,827 sq ft.
The 15-storey office element of the proposed building will have a gross area of 186,280 sq ft and front High Holborn on the southern half of the site.
The residential element – comprised of 48 flats in a 14-storey building – will occupy the northern part of the site accessed via Eagle Street.
The scheme, which has been submitted to the London Borough of Camden, also proposes retail use at ground level.
US private equity firm Northwood, which was established by former Blackstone real estate president and chief executive John Kukral in 2006, bought Templar House from private investor Michael Feldman for £55m in 2014.
It is working on the scheme with development partner Platform.
Northwood owns four properties in London, including 90 Long Acre, WC2, where it is also working on plans for a major redevelopment.
DP9 is advising on planning.