Well I've been trying to get the name of this movie for years. It aired on TV in Canada at least 5 years ago.
I think the movie may or may not have "lakehouse" in the title.
The movie starts out that a nice (maybe blonde) woman probably 30 years old is moving into the house her (Grandfather? or father?) built for her. She is moving in with her boy friend.
As they are walking up to the house, she looks at one of the top floor windows and she sees her (grandfather or father, I'll refer to him as father from now on) in the window. (This is a ghost). Alarmed, she tells her boyfriend that she saw someone in the house. He goes in and searches and finds nothing. Then they go inside.
The main part of the film was that there was this round police officer that was pretending to work on the case that many people died in the area, when in fact he was the scum who hung multiple people then threw their bodies in the lake nearby.
In the film, there is a door to the basement that has a glass doorknob, and in many scenes it is dripping water because of the ghosts of people whose bodies are in the lake. Whenever she goes into the basement to do laundry, she sees flashbacks of the girl being hung in the basement. And often she would get locked inside the basement as well.
I believe throughout the movie when she got locked in the basement, she would end up getting hung by the ghosts or something until she snapped out of it.
I think in the last scene when she figures out it was the police officer who killed everyone, the fat guy tries hanging her the same way etc.
In the end when they put the police officer in jail, all the women who got hung visit her again and smile, and then the LAST scene is her looking up at the house, seeing her father in the window again, this time with a smile on his face.
This movie was awesome and scary for me as a kid. I hope I get to see it again!