Raised concrete slab?
My wife and I just purchased a moderately sloping lot in northern Arizona, near Flagstaff and we’re in the initial stages of designing a roughly 1000 sq. ft. home. Due to it’s 6000+ft elevation the area can get significant snowfall in the winter. Since the lot is downslope from National Forest land we have concerns about drainage thru the soil, particularly with spring snowmelt. One solution we’re considering is a raised foundation that utilizes a minimum of footings; the idea being that a “floating” design would sit gently on the land and allow natural drainage to occur under the house as it continues downhill. Ideally we’d like a radiant heated concrete slab but realize this might not be practical. Would something like this be super expensive? And could it even be properly insulated for the cold winters?