I remember watching this movie a few years back and cannot remember any of the actors or actresses in it.
A couple get a small new house and I’m pretty sure the woman has a telescope or some binoculars she uses to look out of the front window which looks out on to the neighbouring fenced off house. The neighbours come to introduce themselves and the main characters think they are suspicious?
The spying woman then notices strange things happening and one of the couple decides to go and investigate and they end up finding several locked doors? In the basement and eventually resuce a girl that was held down there via the use of a ladder that leads out on to a field on the neighbour’s land.
A fight ensues at some point and the neighbour and his brother or son? Is killed and dumped in a hole which was made for construction work I think?