How do I list an Earth Home?

An "Earth Home" is one with no fully above-grade floor, and thus all floors are considered below grade level (even if a portion is walkout).  GLA is always zero and all baths must be listed as Below Grade. Sq Ft Finished Basement will usually match the Fin SqFt Total unless there is an Accessory Dwelling Unit (ADU) or a finished sub-basement included.

If there is a sub-basement included, then the main (basement) floor above it would be considered the 1st Floor for locating rooms and entering measurements.