A few Westvale houses predate suburban development. The Parsons farmhouse was replaced by development at the end of the 20th century. West Genesee Street has a few late 19th century residences. Early 20th century streets show houses in styles of the period, especially the 1920s and 1930s. After World War II, development was rapid, and most houses of Westvale now date from the later twentieth century. Westvale Plaza, one of the earliest suburban "malls" of the region, appeared in the Avery Tract shortly after World War II. It is extant as a "strip mall," while Fairmount Fair, immediately beyond Westvale to the west, came later. Its interior pedestrian concourse was roofed over about 1967, making it the first indoor, climate-controlled shopping mall in Central New York.