No matter who you look for, the house is leaking.

Legal analysis: It depends. If the house leaks and the property is not maintained, you can complain to the relevant government property management department. But if the water leakage is serious, you can find the owner upstairs to rectify it first. If you behave badly, you can safeguard your legitimate rights and interests through proper channels. If the house leaks because the owner is careless, then the property is ok, and the owner needs to bear the loss and find a professional to repair it.

Legal basis: Article 63 of the Building Law of People's Republic of China (PRC). Any unit or individual has the right to report, accuse and complain about quality accidents and quality defects of construction projects to the construction administrative department or other relevant departments.