"In the Washington region, average incomes are among the highest in the nation. Low interest rates, 100 percent financing and the money that people can make from selling their homes in a booming market have made buying a larger one affordable for more people, whose appetite for space, builders say, seems insatiable.
But why?
In a way, the green frontiers of suburbia are imprinted with visions of perpetual self-improvement in the form of ever-expanding houses that seem at times dreamed into existence, as builders have honed their ability to anticipate people's desires."
