A few years back my wife and I lived in a house in Oberon Close in Waterlooville UK, which saw numerous unexplainable activities.
Around 1995 I had become ill with somekind of flu, but still had an assignment to hand in for the journalism course that I was taking at the time. My wife was out at the time and I was sat on the sofa working on the assignment. To my right was the stairwell and I became aware of something watching me as I worked. I turned to look but saw nothing, as I turned back I felt it was there again. The presence seemed to be a small Labrodor type dog or a small blonde haired child, I couldn't distinguish which, but it definitely seemed to be male. When my wife got home from work I told her what I had felt was there and she went pale. She told me that years before at that same house she was parking her car when she looked up in the rear view mirror and saw a little blonde haired boy staring back at her.
Another incident frequently took place in the back bedroom, at the top of the stairwell. I had a collection of Star Wars memorabilia, action figures and the like, set up on display. Frequently figures would be found resting by the door of the bedroom, yards away from where they had been displayed, as if they had been thrown there. I tested to see if there was anyway they could have fallen and rolled or bounced to this spot and it was impossible, even by throwing them myself I couldn't reach the door mark. The funny thing is that it was always different figures but always the same character - Han Solo, that was found.
We're not the only one to feel something in the house. Friends who have come to visit have used the bathroom on occassion and have felt uneasy, saying a presence was watching over their shoulder while they were washing their hands. (The mirror above the basin looks back on the stairwell and this back bedroom)
At one point things got so uncomfortable that I felt that I had to mention it to someone outside of our immediate family and friends. Almost as soon as I had done this the presence seemed to lift somewhat. It was still there, but not as heavy as before.
Unfortunately I didn't do any research into the house or it's surroundings as we left in 1999 to move to a bigger place (the Star Wars collection was growing out of control my wife said), and we have not heard anything since.