In the end it's about the same cost (for the same quality).
Also prefab houses have a lead time of about 6 month.
But once the on site build has started it's fast and those elements come with electrics, water piping and (sometimes) windows preinstalled. They just need to be connected.
You basically have the choice between the classic building methods with an architect and contractors, or an All-in-One Firm that has it's own contractors and almost always uses the prefab model. The later also is way less hassle for the once-in-a-lifetime home builder, usually.
Also prefab houses have a lead time of about 6 month.
But once the on site build has started it's fast and those elements come with electrics, water piping and (sometimes) windows preinstalled. They just need to be connected.
You basically have the choice between the classic building methods with an architect and contractors, or an All-in-One Firm that has it's own contractors and almost always uses the prefab model. The later also is way less hassle for the once-in-a-lifetime home builder, usually.