Ok, I saw this movie on TV in the 80's and I can't remember very much but here is what I do know... it is a horror or scary movie where a guy is living in this big house and I don't know if he killed his kids or what, but I think he lives alone and he all these voices in walls and it turns out the kids are buried in the walls? The house in the center of forest too.
Anyone know the name of it??

People under the stairs?