Prefab houses become more and more popular nowadays. They started from a small and simple and a contemporary home with everything needed in it. It comes in different variations with the various additional modules. It took about 5 hours to compile the module and get ready to live home. The cottages are built using structural insulated panels for floors, walls and roof, creating a highly energy efficient building envelope. Cottage in a day is the next generation of factory-built, energy efficient, green home based on the 14-square-foot modules. The project was designed by Michael FitzHugh.