I've done quite a bit of conflict resolution in my day. I once worked as a resident assistant (RA) in the dorm and had to deal with very similar problems. Her

I've done quite a bit of conflict resolution in my day. I once worked as a resident assistant (RA) in the dorm and had to deal with very similar problems. Here is my textbook answer. You want to meet with the person on their terms. Go to his/her office/room on a day when the issue is not prevalent, because neither of you want emotion to be an igniting factor. Be humble. Yes, you're pissed and it's clearly them, but trust me, the best action is to bite the bullet and see if the two of you can come to some sort of agreement. Strike a deal. Clearly the other person has some motivating reason behind their issue. If you can fix their problem in a way that they can't, it might also alleviate your problem. In your specific case, I would talk to everyone else in the complex for him. See if you can get action items written down. "I affirm that I will keep the outside door closed at all times". Make sure these action items are clear and understood by everyone. Yes, you may have to talk to everyone personally.