German cockroaches normally live inside as opposed to the American cockroaches and the other large cockroaches that live outside and come inside for food and shelter. The German cockroach is usually brought into your home in a grocery sack or some other way. Lets say you know someone that has German cockroaches in their home, or maybe you don't know that they have them. They come to visit you and boom, you have a house full of cockroaches. German cockroaches as with other types of cockroaches can be brought in in boxes, purses, clothing, furniture (especially used furniture) or anything els