A premanufactured house is a building that is built on a prepared basement. It consists of prefabricated, storey-high panel walls, modules, and prefabricated ceiling and roof sections which are manufactured in factories protected from weather conditions and which are transported to the construction site.

Despite this, roof constructions including their ceiling constructions can be without prefabrication because of special architecture.

Only companies who fabricate or distribute objects by this definition are subject to the following standards. Products of these companies that do not match this definition are not allowed to be named “premanufactured house”.