I rent a room out of a two-family house and put a door knob on my room when moving in so I could lock it when I'm not home. There are 7 of us total and the landlord lives in the other family section. He has a key to the front door and I am more than willing to give him access to my room with notice but he is demanding a key. He is telling me he has a right to one so that he can access my room in case of an emergency and that it violates the fire code otherwise. However, from everything I read I am allowed to have a lock on the door as long as it is unlockable from the inside (which it is) and doesn't prevent egress in a fire. And he doesn't have a right to a key unless it states it in a lease. Does he have the right to come in and change my locks if I don't comply with giving him a key?