Large-scale construction projects in Egypt frequently face the challenge of scope creep, where project requirements change after the initial planning stages. This phenomenon can significantly impact project success, leading to delays, cost overruns, and stakeholder dissatisfaction. While existing research acknowledges this problem, there is a lack of quantitative data on the extent of its impact. This study addresses this gap by investigating the quantitative impact of scope creep on project time and cost in Egypt. The research methodology employed a survey of project managers and stakeholders, along with data analysis techniques. The findings reveal a significant positive correlation between scope creep and project time and cost overruns. The study emphasizes the importance of effective scope management and control mechanisms for construction projects in Egypt. The findings also indicate that the construction industry in Egypt needs to adopt modern project management techniques, such as Building Information Modeling (BIM), to manage project scope effectively.