In today's world, one of the most important and basic parts in urban developments is related to the creation and development of a projects with an infrastructure nature. Meanwhile, these development projects can implement under the public-private partnership (3P) projects that financial challenges are the main factor that can affect the success of the project. In this paper, a novel intuitionistic fuzzy soft computing-based ideal solution based on criteria importance determination and experts' weights computations is tailored. In this sake, the criteria importance is computed based on presented intuitionistic fuzzy preference evaluation method and also the experts' weights are determined by proposing an intuitionistic fuzzy utility degree technique. Moreover, the proposed approach is developed based on last aggregation process to decrease the data loss and cover the preferences judgments of experts thorough the method execution. Finally, a real case study is provided to indicate the process of the method execution and assess the effective criteria in 3P projects of urban development. In addition, a comparative assessment and a sensitivity analysis is considered to show the applicability and sensitiveness/robustness of the proposed approach, respectively.