Does the balcony waterproof construction need to sign an agreement with the property?

Before renovation, you must sign a renovation agreement with the property, and you must read the terms of the renovation agreement before signing. Before the renovation, you should apply to the owner for renovation, and then sign a property renovation agreement.

Before repossession, the owner can consult the housing and construction department to understand the construction situation and master the information of the supervision unit. Once the house has quality problems, the owner can claim compensation from the developer and the supervision unit.