Leconfield House Curzon Street London W1J 5JB
Excavation to provide one additional basement level; removal and replacement of facades at ground floor level and part first floor and alterations to the facades at first to fifth floor levels including replacement windows throughout; demolition of the sixth and seventh floor levels and replacement with new sixth and seventh floor levels with plant in an associated enclosure, creation of terraces at sixth and seventh floor level, a rear extension on the western side of the building from ground to seventh floor level and use of the building as either medical / spa / bars / restaurants / retail / office and fitness, or as office accommodation all within Class E.