Is the prefabricated house an illegal building?

Any prefabricated houses and container houses without the approval of the competent authorities are illegal buildings in principle. Usually, individuals or subjects will apply to the competent authorities for approval when building prefabricated houses, and there will be a time limit, usually within two years. However, under normal circumstances, the competent department will not take the initiative to manage the board houses and box houses built by individuals on their own foundations if the area is not too large. When individuals build their own houses, they use prefabricated houses and container houses instead of houses. Generally, it does not exceed the planned construction area and will not trigger administrative punishment. Therefore, Chengdu Yaheng Tengfei suggested that if conditions permit, it is best to apply to the competent authorities for approval to build prefabricated houses and container houses.