Does the Property Law stipulate that it is the property responsibility for the owner's window to leak rain?

It is the developer's responsibility that the owner's window leaks rain.

After the delivery of the house, if it is not caused by human factors, then all responsibilities shall be borne by the developer. Because according to Article 7 of the Quality Assurance Standard for Housing Construction Engineering, the developer is responsible for the waterproof project of the roof and the leakage prevention of the bathroom, room and external wall.

If the leaking room passes the warranty period, all parties are not at fault, because the waterproof layer naturally ages and causes water leakage. It needs to be repaired by itself.

Extended data:

The leakage of the room depends on the situation. If there is a problem with the quality of the room, it is the responsibility of the developer. If the property is neglected in management or the leakage is not solved in time, resulting in more serious problems, then the property will bear the responsibility. Because according to the contract of the Property Management Bureau and the relevant regulations of the Authority, the property management company should check the room regularly. If not, you can pursue the responsibility of the property and find the property to compensate for the losses.

Owners can negotiate with the property to protect their rights first. The property has the responsibility to maintain the house because of the water leakage caused by the quality problem of the house. In case of property loss due to water leakage, we can further negotiate with the property according to the relevant provisions of the previously signed property service contract.

References:

Baidu Encyclopedia-Measures for Quality Warranty of Housing Construction Projects