They don't have to be at a construction site. It can be in a factory on a production line. Prefabricated homes have been around for a while. Mobile homes are pr

They don't have to be at a construction site. It can be in a factory on a production line. Prefabricated homes have been around for a while. Mobile homes are probably the most common, but there are also modular and panel homes that can be made in a factory, then put together on-site. This site has good info about factory homes. There's a lot of cool things going on in that area. https://modernprefabs.com/ https://modernprefabs.com/