We are about to start building and finishing with research before starting a cordwood and slipform house. I haven't found much on a lower level partially under grade.
We were thinking of a octagon shaped house with loft space but would it be possible to do the larger space above and the smaller space below? How would we support the larger space on a foundation?
The lower area would walk out to patio area and be below grass level on other side like 5 to 6 ft composed mainly of slip form walls and poured floor. He wants a ridiculous 20 inch wall (sounds too big to me for our area of missouri) I was thinking like 12 to 14 inch would more than support everything.
We live in a fairly high clay area with a glacial rock drop of large bedrock sheet that might make digging difficult for a full lower level.
