In the US, a house (for personal use, investment property is different!) isn't really an "investment" at all -- it has some tax-treatment similarities (i.e., you get taxed on any gain when you sell, and you can lower that gain by making additional investments; also you can deduct interest paid on a mortage [within limits]), but mostly it's just a cost of living.
Two big differences:
- You can't depreciate a house - You can't deduct a loss on a house
/jordan