Oh, and around here anyway, a garage (unqualified except by an optional car count {1, 2, 3, etc} or attachment to the house) is where you park the family car if there's enough room left after the lawn equipment, kids' bikes, and all those things you're going to unpack one of these days take up whatever space they demand. A parking garage is an enclosed public space for the parking of some large number of cars related only by their ownership by people who have some business in the vicinity of said enclosed public space. A parking lot is open air and all at ground level.

YMMV