What fun.
Needs a topographical map. How deep is the lot?
Daylight basements are nice, they are earth-sheltered. You could cut-and-fill to get a bigger level floor area somewhere below street level.
Would it be possible to make a three-story house with the driveway a bridge to the third floor? There's a wife involved so probably not. But if you put living space above the garage, there's a possibility of fuel and solvent fumes filtering upward.
We haven't even got to whether is should be square (like the Romans) or round (like the Picts).
