This study aims at examining a better supply, planning and management system of condominium. We clarified effects of initial regulation regarding right of ownership and management system on management of condominium through 28 case studies. We find critical problems caused by inappropriate initial regulation regarding right of ownership and management system, in particular, (1). developers and former landowners tend to keep exclusive right of common space, for example community room, management room, parking spaces and so on. (2). Developers and former landowners tend to keep exclusive right of certain area of site. (3). Original rules tend to be advantageous for developers and former landowners in the right of management system, management expenses, votes and so on. It suggests an important of opening information regarding the right of ownership and management system, and proper initial regulation regarding the right of ownership and management system from the initial stage of management of the condominiums.
