How often do you clean the apartment?
Hygiene and cleanliness are subjective and relative. A good way to figure out where you lie on the cleanliness spectrum is by asking how often you clean your apartment, bathroom, kitchen, bedroom etc. If you feel the need to clean daily or weekly but your roommate prefers to clean monthly or on an “as needed basis”, then this is probably a mismatch and may lead to some disagreements.
How often do you have guests over?
The reality of the situation is you and your roommate have shared space. You should talk about this because some people do not like having too many people in their living space or sometimes they don’t like having guests stay over night. You can always find a compromise when it comes to this, but we recommend you have this discussion.
What do you consider communal and personal?
A huge reason why some people choose to have a roommate is to save money and minimize their expenses. One of the ways to do this is to split spending on items around the house, like food, cleaning materials etc. When in doubt, it is better to ask. Nothing can be more infuriating to coming home ready to eat or make a meal and roommates have already helped themselves to it without your permission.
Do you have any allergies I need to know about?
Knowing if your roommate has any allergies could make your living situation more harmonious or could even save their life. If you or your roommate have life threatening allergies, and you are comfortable discussing this, then maybe you should. This will prevent you from bringing any allergy triggers into your living space and possibly inform you on the best course of action should your roommate have an allergic reaction.