Avenue Lofts, located at 410 East Fifth Street in downtown Austin, might be the city's most architecturally underrated residential property. This 1940s state office building, adapted for condo use by local real estate development firm the Sutton Company in 1999, retains the original Art Moderne stylings common for many institutional buildings of the era -- in fact, the 1938 fire station at Brush Square just across the street embodies the same style, the two buildings . . .