Sooner or later there comes a time when young people leave their parents to start independent life. Some people are ready to live in a shared apartment with other people. For example, there are 4.89 million people in Germany who live in this way. On the one hand, this is cool, because there is always someone to talk to and someone to borrow salt from. But on the other hand, it is not always possible to choose flatmates or to be happy with them. That is why we will try to find the universal rules, which will be useful for people who live in shared apartment for one reason or another.