I moved into this house less than a year ago. I've been woken up about a 1/2 dozen times by "knocking". This seems to occur between 1am and 5am. It seems to me that the first few times were closer to the same time. I remember wondering the first time if it was just a dream. But it then happened several more times on different nights. I haven't tracked which days and specific times because I'm not sure I really want to know. Two nights ago, I was woken up by the same "knocking".
Although there was someone else with me, she said that she didn't hear anything when I woke her up. I want to say that it's always 2 knocks, sort of slow but loud. After I wake up, it goes away. I'm always 1/2 asleep so I'm not sure if it's me or something else. I've checked around the house and never find anything. Lately, I don't turn on any lights but still come up empty. It's hard to tell where the noise comes from. I'm not certain it's either door (front or back). I almost think it's coming from the hallway which leads to my master bedroom (2nd floor). It's not an old house and I pulled history from the local police department there were no medicals or violent crimes. I don't hear any voices and I don't believe it's kids because it happens on week nights. It's just odd.