Prefabricated houses, often referred to as prefab homes or simply prefabs, are special dwelling types of a building assembled from prefabricated elements, which are manufactured off-site in advance that can be easily shipped and assembled at the construction place.
Modular houses have a special feature. The production stage starts with the manufacturing of house components with all the basic communications, like plumbing, power units, doors, etc. off-site, which are then delivered to the place of assembly for final installation. Multiple modules are easily assembled to form one house.
The main advantage is that prefab construction is cheaper than stick-built homes by an average of 10% to 25%. Mass-produced materials on an assembly line cut down costs because factories buy supplies in bulk. The cost of labor is also less because you don’t have to send carpenters, plumbers, and electricians to individual construction sites. A faster construction saves money as well.