This document discusses a design proposal to adaptively reuse the vacant Auckland Council Administration Building by transforming it into a high-rise housing typology with a variety of unique apartment types on every floor. It examines how to establish spatial diversity and avoid repetitive floor plans by treating the structural grid as a generator for interlocking apartment volumes. The proposal explores how high-rise buildings can present varied interior spaces through a complex volumetric system and distribution of different floor plans vertically to create new experiences on each level.