The terms house and home seem to be used interchangeably in market stats, but I wonder if thats really appropriate.
House: a building in which people live; residence for human beings, a household. Source 
Home: a house, apartment, or other shelter that is the usual residence of a person, family, or household. the place in which one’s domestic affections are centered. Source 
Both refer to a residence but the phrase home is more personal. There doesn’t seem to be a real correlation on who uses what pharse. Although the NAR uses home most likely for marketing emphasis, so does the Commerce department when tracking new home sales. Yet Commerce uses the term housing starts.
To me, home implies warmth, personal, a residence and house implies a unit of measure, a thing.
Plus a house is bigger, its got one more letter (wink).