Abstract: Change orders have become a common phenomenon, especially in developing countries which requires a continuous and systematic analysis of the causes of change orders depending on the probability and impact of each factor. An initial list of causes for change orders was suggested from previous research and the final list was developed using Delphi technology. The 200 questionnaires were collected to investigate the proposed model which includes a second-order model to predict the overall change orders on residential projects. Six factors were eliminated to match the model with the recommended measurements. The main factors affecting change orders were the different site conditions and changes in design requests. The final structural equation model provides insight into the effect of measured and latent factors that are not clear in conventional equations. The results of this research are expected to improve the performance of building projects in Egypt by identifying the main causes of change order risks, hence, a risk response plan can be developed.