The bathroom in my master bedroom has never been used, but it stinks, and it can t be inhabited. Lia

If this is the case, the responsibility is still the property matter, because the head of the property pipe seems to have not been done well, so the reverse question,

No one is responsible, your master bedroom bathroom has never been used on the stinking sky, and you can't live all day long, no one is responsible, this belongs to the sewer pipe blocked, you need to find someone to get through, now the most important thing is to repair the toilet sewer, not to pursue the responsibility of the problem.

I think you should first see if the sewers are clear. If it is unobstructed, the water seal is not done well, for example, there is odor leakage under the basin, you can buy a plastic anti-odor plug. If the sewer is blocked, then you can find the property management.

If what you say is the truth, it stinks when you never use it, and of course the responsibility lies with the developer, and the sewer plugging is not done well.

The master bedroom bathroom odor-proof floor drain is not done, the basin sewer pipe should also be odor-proof, the whole building is a pipe, and the smell comes out of the pipe.

The sewer elbow is not done well or there is no water storage in the elbow, and the odor in the sewage pipe comes up. The floor drain should also be checked and deodorized.

This may be that your house is not blocked by the water, and this has nothing to do with the developer.

This may be a problem with the water supply and water in the bathroom, and you can go to the property to deal with it.

The sewer pipe smells, there is no way, cover it when you run out. Renovation is also a big project.

You can handle it yourself, do a good job of water sealing, it should be possible.

When decorating, if you don't check the floor drain materials yourself, the return gas must stink.