Despite December's drop in housing starts, economists and industry watchers are warning that the performance is not indicative of what is really going on within the larger US housing market. Starts fell hardest in the Northeast and US South, where temperatures were significantly below normal and both regions continue to be battered by extensive cold fronts and extreme conditions. And despite December’s number, an estimated 1.2 million units were started in 2017, which is 2.4 percent above the 2016 number of 1.17 million units.