Home values in 60 of the 300 major metropolitan markets surveyed by Zillow have already exceeded or are expected to exceed their prerecession peaks in the next year, including in Dallas, Houston, Denver, Pittsburgh, San Antonio, San Jose, Calif., and Austin, Texas. Nationally, however, prices are still 13.5 percent below their 2007 peak. Still, many major markets in California are already considered unaffordable, with people paying a greater share of their monthly incomes on mortgage payments than historical norms