The construction of projects within cities with high population density is a common practice for city development, some of which can be a solution to the problem of congestion or the addition of new services to cities such as bridges, tunnels, and new service or residential buildings. To ensure the success of these projects, the existing public utilities should be studied, which in most cases require diversion or connection to link them to the newly developed projects, to avoid negative effects such as an unexpected increase in the cost of diverting them, delayed project schedule or unexpected risks. In this research paper, the previous studies and the necessary items that directly affect project management in general and the management of diverting utilities in particular were compiled and analysed to find out the main factors for different types of projects (underground, above ground and suspended) that may have an effect on utilities diversion during the construction phase. For this purpose, a multi criteria decision model has been developed to evaluate the effect of utilities diversion on projects before construction by introducing the critical parameters included under the project management triangle elements (Time - Cost - Value). A model was developed to help in evaluation of such activities and to rank the project impact on the existing infrastructure, therefore, help the decision maker to take the right/necessary action.