A real estate is built on two floors, and the developer said, "Apply for construction while building". Is this ok? Is property right guaranteed?

Answer: No, the expansion and reconstruction of buildings must be reported to the competent department for approval. The original Construction Project Planning Permit can be changed or annotated, and construction can only be started after obtaining the construction permit. Failure to perform the above procedures shall be deemed as illegal construction. Therefore, their property rights cannot be guaranteed. I saw the explanations of relevant cases in the MBA think tank documents.