By integrating the nature of modularity in prefabricated housing design, a web-based design advisory system provides interactive questionnaires to assist customers in selecting appropriate design components. The prototype model combines the result of client’s requirement input and design configurations of a modular system. The digital model is created by Building Information Modeling (BIM) applications to streamline the delivery process from design to manufacturing. Finally, the BIM design model can be reviewed via Google Earth before sending the ready-to-build digital information model and building specifications to the collective manufacturers and suppliers.