To answer your question, he spawned in the house and unfortunately he's stuck inside, but at least he can shot at you from the windows, unlike the reaper. Just like having to hunt for the last alien that is a reaper stuck in a small room, quietly waiting to die.
Which brings me back to my old suggestion. I would love for a modder to turn reapers into wreckers. I want them smashing through walls toward the scent of a live human. Warboy said it can be done, but it'll be very difficult since he already set the pathing for the reaper, and doesn't wanna undo it. I think that's what he said
I can dream about it though.