Modular construction is the use of volumetric building modules where the units form the structure of the building as well as enclose usable space. Modular construction is particularly popular for hotels and student residences due to the economies of scale available from many similar sized modules and the particular benefit of reduced site construction time. Modular construction is the use of volumetric building modules where the units form the structure of the building as well as enclose usable space. Modular construction is particularly popular for hotels and student residences due to the economies of scale available from many similar sized modules and the particular benefit of reduced site construction time.