I happily lived in an underground house for several years. However, there were some key differences in the design. My house had an above ground A frame roof wi

I happily lived in an underground house for several years. However, there were some key differences in the design. My house had an above ground A frame roof with a door at ground level. The door opened to stairs going down to a second door to enter the living space. It looked like a house that had sunk 3/4s of the way into the ground. I never had a any problems with pests or flooding and the heating and cooling costs were tiny, even with winters below freezing and summers in the mid 90s. I guess technically it was a "mostly" underground house and in my experience that design worked really well.