Demolition of the existing double pitch roofs and replacement with a roof terrace with a new natural slate mansard roof surround with dormer windows, associated new access stair, WC & minor store. New structural support at upper floor levels to support the side wall; a new staircase connection to lower levels and some minor internal works including installation of a misting system and reinstatment of some removed or altered original features.

Erection of rear extension, formation of lightwell and associated excavation to lower ground floor level; glazed conservatory at rear ground floor level with associated balcony and stair; partial demolition of existing closet wing and replacement with raised roof level; installation of dormer window, roof light and AC units at roof level and associated works. Internal alterations, including changes to planform.

Erection of rear extension at lower ground floor level and associated excavation to lower ground floor level; glazed conservatory at rear ground floor level with associated balcony and stairs; partial demolition of existing closet wing and replacement with raised roof level; installation of dormer window, roof light and AC unit at roof level and associated works. Internal alterations, including changes to planform.

Amalgamation of the ground and first floor maisonette, with the second floor flat, the third floor and part of the fourth floor penthouse to create a single family dwelling house, creation of separate self-contained four bedroom flat at fourth floor level (accessed via 19M Hyde Park Gardens). Demolition of existing extension at ground and first floor, installation of replacement windows at ground, first, second and third floors, demolition of crittal doors and terrace at fourth floor and roof level, erection of mansard roof with dormer windows and parapet, demolition of roof access and rendered chimney and erection of lift motor room at roof level. Internal alterations and refurbishment, including the reinstatement of original features throughout including fireplaces and joinery details, reinstatement of spiral stair from lower ground to third floor, demolition of lowered ceilings, removal of a twentieth century stair and addition and removal of partitions (linked to 20/08322/FULL).