Thats not so easy these days. I built a massive triple garage sized workshop at my old house as i had the land for it, but when I moved the other year there were very few houses these days which had a double garage or even the land to build one on - unless you went for some farm type place. In the end I managed to get a house with a double garage - but any "double garage" seems to only be about 16ft square, so you can just about squeeze 2 cars in and thats it.
Lol, sorry was thinking like a Kiwi. Standard here is 2 car garaging at least, sometimes more, like 4 or 5 + if it's a big house.