@Ray McCarthy In the US they're just Realtors, or Real Estate agents. I'm sure that the term comes from the fact that they sell real estate. Which has always confused me because if some estate is "real" is some then "fake" as well?
@tinkerdan what is cad? Someone else mentioned it too and when I looked it up it asked me if I was looking for things in Canada or the college of art and design.
@Ursa major I actually found them really interesting but really confusing too because never having actually lived in a house with an upstairs or more than 2 bedrooms I couldn't really wrap my head around the size of the houses nor why they were laid out the way they were. Maybe it would be different if I weren't American, houses in America all seem either unnecessarily big or unnecessarily small to me.
CAD = Computer Aided Design.
Mostly considered to be a mechanical drafting program, but can encompass other design tools like schematic and PC board design. Not only can they draw things, but they can provide analysis, too.
There are many free programs that are geared for general drawing and many that are geared for architectural work. Google Sketchup is a free program that is a generic drawing program, for example.
In the US we tend to like our space, so large homes sell well. People have bedrooms, but also offices, exercise rooms, sitting rooms, home theaters, and a growing trend called man-caves, which is where middle aged men can be kids again, but with the added benefit of alcohol. ;-)
Large bathrooms are a desired luxury, too. Master bedrooms have their own bathroom and walk-in closets. They are almost like the ancient solars in England.
Many houses have a formal living room and a recreational room (informal living room). Even one of my first homes, a mere 1,000 square feet (93 square meters) had a formal living space and an informal living room (but no master bedroom bath). They were small, but that was how they built it.
Older homes the kitchen were small and tucked away. Modern homes have large open kitchens that adjoin larger living spaces and look out onto back patios or in our case, an unground pool.
I tend to notice many large homes built on small lots. People tend to prefer to be sheltered in large air-conditioned and heated spaces than having large outdoor expanses. I prefer both.