Abstract : Examining the association between the leadership style of the project manager and project performance in Abuja was the aim of the study. The idea of project management was developed, encompassing the tasks of planning, directing, and controlling resources to accomplish a project's acceptable performance level, which is usually evaluated in terms of time, money, and quality. Transformation, transaction, and democratic leadership styles served as the foundation for the operationalization of leadership styles, whereas project quality determined project performance. The study primarily uses primary data obtained via surveys, which are then analysed using the Statistical Package for Social Sciences to create indices that are used to evaluate and confirm hypothesised hypotheses.There were 1,004 people in the study's population, and 125 of the 286 samples were used for the construction company. On the variables, correlation and regression analysis were done. The findings indicate that, depending on the project quality, there is a substantial correlation between the project manager's leadership style and project performance. The results demonstrate that using a transformational leadership style raises the bar for project quality. Nonetheless, based on democratic leadership, a strong correlation was found between the project manager's leadership style and the calibre of the work. It was determined that to reassess project assumptions, look for answers to project difficulties, and create fresh approaches to carrying out project tasks, project managers ought to engage with team members more frequently.  Project managers must have a strong leadership style to improve the quality of their work, and they must encourage their team members' intellectual growth.