For around here, lower class. Detached single-family homes in this area are around 600k and up unless it needs a lot of work. We can't afford that, so we're in the slum part of town that hasn't quite been McMansionized. They're heading our way, but haven't made it to our neighbourhood yet. We need to be out of here before it gets this far.
We have two cars (one new since August), and our debt consists of the new car and our house ('condo'). The husband's job is white collar -- he's dragged into all the upper management/head officers meetings. We're prone to expensive hobbies, but we don't buy stuff without having cash on hand by the time the cc statement is due. Hence, no credit card debt. We also have enough savings to cover most major emergencies.
I'm sure in other areas we'd be middle to upper class. We're the 'rich relatives' as far as most of our respective families are concerned. My one cousin's mother has said that she wants to live with my cousin and her now-husband (who live with his mother) because they're rich -- they have cable.