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East Asian urbanization is characterized by complex processes of extensive densi fication. Fuelled by rapid economic growth, Asian cities' size, scale, and physical dimensions remain incomparable to any Western se ing. During the past thirty years alone, various concepts have a empted to de fine hyperdensity, layering, and intensity as core principles of Asian urban development. Although these concepts explore the physical properties of development, few examples provide insights into the behavioural and social dimensions of such complex morphological se ings. This paper examines the eff ects of urban compaction and volumetric urbanism on liveability in East Asian cities. Hong Kong exempli fies an extreme scale and rate of densi fication. Podium developments – commercial plinths elevated above street level that connect large residential towers to commercial complexes – are one of the city's most common development types. The hypothesis is that the combination of diff erent types of podium development results in the interiorization of the urban realm, which compresses public services, social engagements, and behavioural conditions into diverse privatized and fragmented 'public interiors'. To explore these conditions, this paper first outlines the conceptual premise of reading urban se ings through the lens of volumetric urban compaction. This framework combines urban compaction and volumetric urbanism. Second, the paper discusses theories that deal with the links between spatial se ings and behavioural traits. Privatization is of particular interest here, including those processes in which the private and the public become interchangeable conditions or where the temporary occupation of functions occurs. The diff erent concepts – volumetric urban compaction and interiority – are studied within Olympian City, a podium development in Kowloon (Hong Kong). Through fi eldwork, the case is investigated in terms of the elements that make up Olympian City's spatial con figuration and how diff erent groups use space at diff erent times of the day and week. The case study shows that Hong Kong's development follows an economically driven model of volumetric urban compaction; it supports a larger privatization strategy that depends on the interiorization of the city to the extent that makes the overall structure highly exclusive, static, and controlled.

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