Today the Iron Triangle (cost, time and quality) is insufficient as a sole factor of a project’s success. Other criteria need to be considered, which will allow stakeholders to accept results of the project. Underestimating these factors can lead to a negative attitude by stakeholders and thus to obstructions while implementing the project, which in turn can cause the Iron Triangle criteria not to be fulfilled – cost overruns, exceeded time schedule etc. This article presents a structured review of the theoretical issues of project management related literature and based on practical experience in managing construction projects, the authors propose criteria for evaluating the success of these projects. The proposed criteria and their influence on a project are demonstrated in a case study on a selection of construction projects. This article also gives a possible practical approach to evaluate a project’s success.