Loud malicious neighbor
I live on the top floor of a 1960s-era three-story apartment building. My downstairs neighbor moved in a year ago. I listened to his stereo/TV through my wood floors for about a week before asking the apartment manager to ask the new tenant to turn it down (it had gotten loud enough one night that I could croon along with the songs). The next morning I had a nice note from the neighbor introducing himself and asking to please call him if he ever got too loud again. I introduced myself and found out that he was a nice guy.
So for a year I've had no reason to call him or the apartment manager with noise complaints. About a month ago, however, he started turning his stereo up really late at night - midnight, 1 am - once or twice a week. I finally confronted him at 1 am last weekend. Well, I tried to confront him. He wouldn't open the door, only yelled "Got it." I trudged back upstairs. The music went soft for about an hour and a half and then up again. I was too tired to go down and confront him a second time.
So this morning, at 2 am, he cranks up the stereo. I call the apartment manager and say "My downstair's neighbor has his stereo on way too loud." I assume that he calls him because the apartment goes quiet. Ten minutes later I hear a rustling at my door, like paper. I figure he (the neighbor) is leaving a note. This morning I go to look and there's no note - but the flower poster I had on my door is gone.
I call my apartment manager and fill him in on the situation.
My question is: Where do I go from here? I get the feeling that my apartment manager thinks I'm making too big a deal out of the noise. I try to be very quiet - socks, tiptoeing, keeping the volume of my TV and stereo very very low. I don't expect others to be as considerate, but they should at least follow the "quiet hour" rules set forth in the lease. (Noise should not be heard outside of any apartment between 10 pm and 8 am).
Should I start looking for another apartment? I don't think I will feel safe in this building until the neighbor leaves. I feel silly saying this but the taking of the poster feels really threatening. I can't prove that it was the downstairs neighbor who took it but reasonably who else could it be?
I also have it on good authority that he has a violent streak.
Thanks for listening. I don't want to move (I've been living here for four years) but I don't know what else to do.