Home prices dipped slightly in July according to the S&P Case-Shiller 20-City Home Price Index. Year-over-year, home price growth dipped to 5.00 percent from June's reading of 5.10 percent. The Pacific Northwest led the nation in home price appreciation. Portland, Oregon had the highest year-over-year home price growth with a rate of 12.40 percent. Seattle, Washington posted year-over-year home price growth of 11.20 percent. Denver, Colorado was third with a year-over-year home price growth rate of 9.40 percent.