"This deceleration is natural and should help keep market fundamentals in balance over the longer-term," said Anand Nallathambi, president and CEO of CoreLogic.
Many economists expect the housing market to keep improving, though with slower gains in home sales. Still, the spike in rates over the summer has weighed on the market. A measure of signed contracts to buy homes fell 5.6 percent in September to the lowest level in nine months.
There is generally a one- to two-month lag between a signed contract and a completed sale. The sharp drop in September suggests final sales will decline in the coming months.
The annual price gains are widespread, according to CoreLogic. Prices rose in all 50 states and in all 100 of the largest U.S. metro areas.
Price jumped 25.3 percent in Nevada from a year earlier, the most in any state. California (22.5 percent), Arizona (14.6 percent), Georgia (14.4 percent) and Michigan (13.9 percent) reported the next highest gains.
Home prices are still about 17 percent below the peak reached in April 2006, according to CoreLogic.