It was said a couple of posts ago that what you photographed was not a roach, which isn't the case. I've lived in a roach infested house before and I can assure you that is 100% a cockroach. There's many many different varieties, so perhaps the other poster is only used to one particular type.
At any rate, I would caution you that for every one roach you actually see there are literally thousands you don't. You might not think they're actually in your house, but the truth is they go wherever the food is. I always found they liked to come out mostly at night, when it's dark... yech
Sorry to be a Debbie Downer... just thought you might want to know a bit more about it!