A cooperation agreement for the utilization of regional government assets is a legal instrument aimed at optimizing regional assets through partnerships with third parties to support the provision of public services. One such form of cooperation is the agreement between the Subang Regency Government and PT Bima Eka Jaya for the development of a Public Service Mall through the utilization of regional government property in the form of land. However, the implementation of the agreement failed to produce the development as stipulated in the agreement, resulting in the failure to achieve the objectives of the cooperation. This study aims to analyze the implementation of the cooperation agreement and examine the legal basis for its termination by the Subang Regency Government. This study employs a descriptive-analytical method using a normative juridical approach supported by field research. Data were collected through library research, document analysis, and interviews, and were subsequently analyzed using qualitative juridical analysis. The results indicate that the development of the Public Service Mall showed no significant progress and therefore could not be completed in accordance with the terms of the agreement. Based on the results of a technical evaluation conducted by the Department of Public Works and Spatial Planning (PUPR), the Subang Regency Government decided to terminate the cooperation and not extend the term of the agreement. The termination was undertaken as a measure to protect the interests of the regional government in managing its assets. However, the termination also resulted in losses to third parties due to the failure to implement the development project as previously agreed.