Once Jack Baker finds you, just tease him out by slowly walking away from him. When you're both outside, the door will slam shut by itself, because this is a spoooooky house (and also to prevent the game from wasting resources on areas the player isn't looking at). That's when Jack abruptly decides to give up on this whole "terrorizing normies" business and heads back into the house ... only to get hopelessly stuck at the door.
Note that Jack is perfectly capable of opening doors most of the time, but if he's ever outside, his eagerness to get back in apparently makes him forget how to operate this complicated technology. And this problem is genetic, because the same thing happens to his poor wife:
So in theory, you could lock the entire family out, forget about the plot, and enjoy your sweet new house. Frankly, it would be foolish to bypass such an opportunity, given the state of the housing market.