No matter where you complain about the leakage of balcony property.

In general, the waterproof warranty is 5 years and the pipeline is 2 years. If the developer is not responsible during the warranty period, he can also find the property responsible. If no one handles it, you can complain to the local quality supervision department, or you can take the legal form and go to court to complain about the property. If the same place can't be repaired twice during the warranty period, you can find someone to repair it yourself, and the cost will be borne by the developer. The roof is public. After the warranty period, minor repairs should be shared between the upper and lower floors. Of course, if the house exceeds the warranty period, the owner needs to solve it himself. However, the property has received the owner's maintenance fund, so in most cases, the property needs to repair the house leakage.