Treasure Valley home prices rose by 17.2 percent year-over-year in September, beating the national average by more than three times, according to CoreLogic, a company that provides data on residential real estate markets.

The rise was tempered somewhat — only 13 percent — when distressed sales like short sales and bank-owned homes were taken out of the calculations. Distressed sales tend to have lower sales prices.

Idaho had the second-highest average home price appreciation in the country since last September, CoreLogic said. That was the case both when distressed sales were factored in and when they weren't.

Home prices nationwide, including distressed sales, increased year-over-year by 5 percent in September.

CoreLogic predicted that October prices nationwide will be 5.7 percent higher year-over-year.

Home price "gains are particularly large in former housing bubble states and energy-industry concentrated states," said Mark Fleming, chief economist for CoreLogic.