I live in the house I grew up in. My dad designed the second floor, an addition.

He knows the skeleton of this house in a way I never ever will. He lives 50 miles away now, but I still have him as an amazing resource about my house.

I wanted to run cat5 to my office on the second floor a number of years ago. "Oh just drill a hole in the floor right here in this corner, there's a void that goes all the way from the second floor to the basement." Sure enough.

What I want is the schematics that my dad has in his head.