Many Bi-level homes are designed with the garage built into the basement level. This compact design is ideal
for lots where the topography is hilly or where there is no space for a garage. Other versions use the entire lower level for bedroom and other living spaces.

NOTE: Overall bi-level square footage as stated in the Multiple Listing Service details may be showing square footage on the main level only, or including the lower level living space.  It's done either way.