Apparently feeding on a stream of new buyers, architects are reporting that business is better than it's been in eight years, with demand for their services in designing move-up homes, custom or luxury homes, and starter homes sharply increasing in the first quarter of 2013, the American Institute of Architects' first-quarter 2013 Home Design Trends Survey suggests. The trade group's Home Design Survey Index for last quarter registered a score of 67 out of 100 for billings and 75 out of 100 for inquiries for new projects. Any score above 50 reflects positive business conditions, AIA said. “With business conditions at residential architecture firms at the strongest growth level since 2005, this is a very encouraging sign for the housing sector and broader economy in general, espe...