Are you saying that it costs more to build a 2 level in Australia? Here it costs less. The biggest cost is the foundation so if you have to make it larger for a one-level house it's a big expense.
Yes, it definitely costs more to build a 2 storey house here.
You actually bring up a good point re the size/cost of the foundation. Maybe this is why 2 storey houses seem to be prevalant in the US (at least based on the TV shows I watch

and places I have visited). We all just thought most Americans were very rich to be able to afford all these 2 storey houses!
I think the difference here is in the cost of installing staircases, equipment needed to build a higher level, additonal plumbing, more bricks (external appearance of most houses nowadays are brick or rendered brick with a wood, or very occasionally, steel frame), etc. Depending on the builder they don't seem to take any longer than a single storey to build though.
Also, it's only been in the last decade or so that 2 level houses have really taken off here and they do get a bad wrap at times (they are seen as extravagent

) and are nicknamed "McMansions", often (but not always) because the bottom level is equavalent to the entire size of a standard single storey house.
There is a subdivision near me that comprises mainly 2 storey houses, but they have no choice but to go up as their blocks are so small.
As a comparison, a standard single storey house in my state (4 bedrooms, 1 ensuite, family bathroom, toilet, laundry, kitchen, dining room/family room, maybe a study and/or rumpus room) is about $150,000-$180,000ish (base figures). I doubt you'd find a 2 storey house under $200,000 these days. $230,00 would probably be the starting point.
Oddly enough, there isn't that much difference in price between a 1 or 2 storey established house.
I honestly have to say that of all the boards I'm part of, this thread has proven to be one of the most interesting and informative ones I've ever read. It just proves that it's the 'small' differences that are the ones which really set countries/regions apart. (Separate toilets/bathrooms, which costs are involved etc).
Would it be extremely unusual to find an American home with the toilet in a separate room to the bathroom? One other thing I have noticed on my travels - US toilets are lower to the ground than Australian ones.
