My roommate is crazy, can I change the lock?
No! If your roommate has ever paid you or if they have a signed rental agreement with you or if they haven’t paid but have been staying with you for more than 30 days you must evict them in housing court. Look at the section for landlords to find out how to file a holdover case. Also, check the court’s DIY interactive program for the Roommate Holdover program to make up the paperwork.