Is the owner responsible or the property responsible?

Legal analysis: you can find the property to be responsible for the maintenance of wall seepage. According to the "Measures for Quality Warranty of Housing Construction Projects", the warranty period for external wall leakage prevention is five years, and the five-year period starts from the time of house acceptance and delivery.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 292 Where the owner of a real estate needs to use adjacent land or buildings for building or repairing houses and laying wires, cables, water pipes, heating and gas pipelines, the owner of the land or building shall provide necessary convenience.

Article 293 The construction of a building shall not violate the relevant national engineering construction standards, and shall not interfere with the ventilation, lighting and sunshine of adjacent buildings.