This chapter establishes comprehensive rules for condominium ownership, defined as a composite right comprising exclusive ownership, co-ownership, and joint management. It addresses practical issues like the regulation of parking spaces and outlines the powers of owners’ assemblies. The text provides a comparative overview of similar legal institutions globally (e.g., apartment ownership, residential ownership) and discusses prevailing theoretical frameworks, ultimately endorsing the tripartite theory aligned with China’s Civil Code. It concludes by emphasizing the necessity of this specialized legal regime to manage the complex, three-dimensional neighborly relations inherent in modern high-density urban living.