What is a 2-story house?

A storey on a house is only official if it is above grade. A basement does not count as a storey. To have a two storey house, it has to have 2 levels above grade. ie a main floor and an upper floor. A walkout basement on a bungalow doesn't count. And the upper level has to be the same size or comparable to the main floor to count as a complete storey. This can also include houses that only have half the actual living space on an upper level, however they have a vaulted 17+ foot ceiling in the living room and/or kitchen. This still counts as a two storey and is apparent when viewing from the outside.