In Dubai, Green complex buildings, either with smart green buildings or conventional design, still face defiance associated with facility management, maintenance, and property management. Much research confirms unpredictability measures of the financial obligation and maintenance budget allocated for operating sustainable buildings. As a result, it creates a critical gap when the project is handover to the facility management without the proper future cost incurred between the end-users and project management. This paper introduces the proposed research aim to initiate a new life cycle plan model and guideline for JMB involvement in sustainable building development. Moreover, it exhibits an intensive review of the needs of the Joint Management Body depicted with the life cycle cost analysis, which forecasts the cost of facilities management. It is also emphasized the figure out the variables related to the JMB_LCC model. A combination methodology of the quantitative survey using the Likert method qualitative survey is planned to carry the LCC-JMB model, and mathematical modeling of the LCC calculator will be implemented. The outcome of this study is a pathway for future research to integrate other parameters that influence the life cycle cost analysis for the green building, which creates a novelty on significant roles of JMB.