Kenny Byerly, one of the writers, also had this to say about it:
"This is amazing and I can vouch for its accuracy. It’s very similar to, and actually much prettier than, the rough CG top-down mockup we were given as reference for the lair. I like trying to figure out the layouts of TV locations, but I don’t think I would have been able to piece this together based on what we’ve seen on the show so far. The one thing I would note is, I don’t THINK there’s another staircase past the archway to the Turtle bedrooms. And I think Leatherhead lives much farther away."
source:
http://kennybloggerly.tumblr.com/