Thank you both for your great answers. I'm currently looking into land and so far it seems that it will probably be flat, so I'm pondering wether to dig it down or just build on ground. My main concern is heating during the winter.
I'll keep on reading and post as I go. Again, thanks!
Considering my climate (70-90F summers, 0-20F winters, lots of rain), is there any modification I would need to do to my cob-mix?
My main concern is spring/autumn where we have periods of constant rain. I know that adobe buildings in desert climates can last for millenia, however I've never seen any in areas of rain and snow.
If I were to have the building semi-underground, so that one wall would be against soil, would I need to use polyethylene or would the cob/adobe made from the same soil work by itself? I've been reading a bit of Oehler's book, but so far I haven't stumbled across anything suggesting the use of cob/adobe.
I'm fairly new to building and have lots to learn, any help is greatly appreciated.