Sales in the Midwest went up 31.6 percent, those in the Northeast rose 20.8 percent, sales in the west increased 21 percent and those in the South edged up 0.4 percent.
The median sales price of new houses sold in December decreased to $288,900 from $297,000 in November and the average sales price declined to $346,400 from $364,200.
The stock of new houses for sale at the end of December was 237,000 (231,000 in November). This represents a supply of 5.2 months at the current sales rate, lower than 5.6 months in October and November.
Year-on-year, new home sales grew 9.9 percent in December.
Considering full 2015, an estimated 501,000 new homes were sold. This is 14.5 percent above the 2014 figure of 437,000.