Do eviction laws differ for tenants of rooming/boarding houses versus apartments or houses?

Yes, but I don’t believe the differences would apply to your situation. You should send a written demand for the property (room) - it might seem strange since they are only renting a room, but you have to make sure they either receive it or you make all reasonable efforts to get it to them. Then, if they do not leave after that date, you can file a dispossessory action in the magistrate court of your county. If you would like to discuss any issues further, please feel free to contact my office.  The link to my contact information is below.  Thank you. The foregoing is general information only, not specific legal advice. No attorney/client relation has been created or should be implied.