The incredible shrinking house: could America be starting to lose its fascination with super-sized houses?

Stephen Gandel, writing for Money Magazine, asks the question. An excerpt:

Up until now: Over the years, many a seer has predicted the mass downsizing of the American home. Instead, the average size of newly built houses has continued to rise from just over 1,600 square feet in the late 1970s to nearly 2,300 now.

But a number of trends suggest that this time Americans really might be willing to swap their McMansions for McCottages. For starters, baby boomers, whose eldest members turned 62 this year, are increasingly becoming empty-nesters; with children gone, they need less space.

Families themselves have changed dramatically. Between 1970 and 2000, the percentage of nuclear families - married couples with kids - declined from 40% of households to 24%, according to the Census Bureau. And childless families are expected to increase. For them, the supersize house may no longer be the ideal.

Then too, Generations X and Y seem more intrigued with life downtown where they can enjoy easy access to restaurants and entertainment, a minimal commute and smaller, easier-to-care-for living spaces.

"Ask anyone how many rooms in their house they don't regularly go into and most will admit that they actually live in a small percentage of their home," says Marianne Cusato, an architect who used to design 3,000-square-foot-plus homes but now specializes in cottages.