Most houses that have a 2-car garage have space for four cars total, but finding something where you can park a car on the side of the house/garage is a plus. Townhouses and condos don't work well for car guys.
I'm actually looking for a house right now as well, but in a very certain area, and finding something with plenty of garage space, or room for an additional garage is tough. I don't want to live out in the country, which makes it difficult to find something with any land to it. Luckily I've got my wife on board with the garage idea, as our current 3-car doesn't have enough room for me.