Illegal, unauthorized construction without the approval of the city planning department is illegal and should be dismantled according to law. It is harmful to build a shed on the roof;

(1) affects the beauty of the house. In order to increase the building area or usable area, it is illegal to build a shed on the roof or add stories for expansion. On the whole, it affects the appearance of the city, the safety of the floor structure and the bad influence.

② Threatening the overall safety of the building. Whether building a shed on the roof or transforming the roof into other use space will increase the bearing capacity of the roof and the house, the weight of the roof will also increase, and the foundation of the house will be easily damaged. After a long time, uneven settlement will occur, which will easily crack the wall and even threaten the overall safety of the house.

(3) destroying the roof waterproof structure. When the roof is decorated, there is a waterproof layer. Building a shed on the roof, or transforming it, will destroy the waterproof layer of the roof, and the waterproof layer will be destroyed. On rainy days, there will be water leakage downstairs, but it will not be worth the loss.