Partial demolition of the 1980s extension with infilling of existing terrace space at 43-44 Parliament Street and development of a new facade to the Canon Row elevation; a new roof and mansard on 1Parliament Street and 2-4 Canon Row; refurbishment of Bridge Street buildings; and alterations to ancillary residences to provide further accommodation for parliamentary uses (Sui Generis); internal and external refurbishment, including installation of new building services; secondary glazing; and interiors; creation of new openings; and refurbishment of basement vaults, and associated works including temporary construction works. (Linked to 19/08287/FULL) REVISED SCHEME: including amendments to Canon Row facade, roof plan and form, pitch of Parliament Street mansard roof extension to north and northern lift overrun; increase in area of photovoltaics; internal amendments.

Use of the existing buildings to create two dwelling houses with extensions including demolition and rebuilding of the mews building and excavation to extend the existing basement, installation of air conditioning units on the roof of 1 Upper Belgrave Street and vaults of 1 and 2 Upper Belgrave Street, and associated alterations. (Site includes 1 Groom Place) (Amendment to listed building consent dated 24 June 2021 (RN: 20/07237/LBC) to reconfigure basement to new build mews element to elongate pool and alter poolside accommodation.)