How far underground?

In order to receive the benefit from a "near constant temperature year-round" how far underground does a house have to be put?

Tom C. : A good question would be 'Where do you live?'' I Would start with Rob Roy's Books because I've met the man personally and have been to his workshops !
Any of his books would be good reading for a man thinking about building a home, . You can always drop him a short note here, or at the Permies Forum/thread 'green buildings'

For the Craft ! Big Al

Tom C : tho you posted this in the conservation thread, you should be looking in the buildings forum.
Where there is a ton of good information. No worries!!

Hindsight is 20-20 ! For the good of the Craft, PYRO Logically - Big Al








the Wofati thred may be right up your alley