Prefabrication and modular building go together but are not the same. Prefabrication refers to a building that is manufactured with factory-made components which are then transported and assembled on a job-site to form a complete building. Modular building is also done off-site, but in a controlled environment, using the same materials and adhering to the same codes and standards as traditional builds, except faster. Modular buildings are created in “modules” that match the design intent and specifications as laid out by the developer.All modular buildings are prefabricated, but not all prefabrication is modular. The differences are in the materials, design and assembly of the pieces. Prefabrication and modular building are growing trends in the construction industry. The precision involved in using a controlled environment results in lower costs for a variety of projects.