Do Not Use Each Other's Things Without Asking. Not using each other's things without asking is one of the more obvious roommate rules. While some people are more casual about sharing, others are not. You have to learn what kind of person your roommate is and then act ingly.
A Roommate Agreement is a written contract between roommates that outlines their rights and obligations while living together. This agreement includes house rules, maintenance duties, restricted behaviors, and more. For a Roommate Agreement to be useful, everyone sharing the household must agree to it.
A roommate arrangement is when multiple adults occupy a single unit together. In most cases, the renters are not related, but siblings and cousins can be roommates as well. With a traditional roommate arrangement, all roommates share a single lease.