I discovered some Connor house bathroom shenanigans while doing this. The bathroom that Riley slits her wrists in is actually the one adjoining John and Cameron's rooms. But for the bathroom exterior, they used a door across the hall from John's room (a door to a room we've never actually seen the inside of). Also, when Sarah smashes the bathroom mirror at the end of Strange Things Happen at the One Two Point, it's not really her bathroom that she does it in (it's probably just a set). We see her actual bathroom when she's packing at the beginning of To the Lighthouse and it looks nothing like the mirror-smashing one.
One other funny thing I noticed: At the beginning of Goodbye to All That, Sarah looks out the kitchen window at Cameron (who's at eye level). Well, I guess cyborgs can levitate because there's no porch outside those windows and it's pretty high off the ground. Or maybe they set up a platform for that shot. I like the levitation explanation better, though ;)
If you missed it last year, I did a layout of the season 1 Connor house. I'm still annoyed that they relocated the hot water heater and stuck some stairs in its place in between What He Beheld and Samson & Delilah!