Here is an example of what a realtor has to say about listing an ESH (earth sheltered home):
Earth Sheltered Home Finds a New Steward
Anyone near Indy?:
Indianapolis, IN
And unfortunately here is an example of an ESH build that doesn't appear to have been done correctly:
Mankato MN
I stumbled across this while searching for ESHs. I'll ad this to as its pretty interesting imo.
http://www.missilesitehome.com/