Is the property with overweight floors liable?

No, the overweight floor is a house quality problem. According to Article 26 of the Regulations on Quality Management of Construction Projects, the general contractor shall be responsible for the quality of all construction projects. If one or more of the survey, design, construction and equipment procurement of a construction project are contracted by the general contractor, the general contractor shall be responsible for the quality of the construction project contracted or the equipment purchased. Therefore, the property with overweight floors is irresponsible.