Silent House 2011

This movie is about Sarah as she and her dad go to their lakeside retreat to pack things up inside because it is being sold. While there, her uncle also helps get the place up to scratch so they can sell it. The uncle has to leave to get an electrician to check the wiring, but after he goes she starts hearing noises and seeing what she thinks are people inside the house. Soon she and her dad are attacked by someone or something and they end up in a fight for their lives. But there's something more going on here than she thinks.