Remember the days when more was ... well, more? Those days are past. The American Institute of Architects (AIA) predicts that the biggest home design trend for 2010 will be to scale down and maximize a home's usable space.

AIA Chief Economist Kermit Baker notes that home sizes "have been trending downward recently, with a significantly higher number of architects reporting demand for smaller homes this year."

Upscale buyers are also expected to want homes with open floor plans and outdoor living enhancements, like fire pits and kitchens. These features are especially desirable for homeowners who like to entertain.

For more serious-minded buyers, expect to see office space incorporated into the home design. In many cases, extra bedrooms may be converted to dual work stations so two-income couples can work from home.

Finally, eco-friendly housing is becoming even more popular, especially among younger buyers. The desire for concrete counter tops, tankless water heaters and recycling bins built into kitchen cabinets, as well as energy-efficient features are on the rise.