The Clark County housing market cooled off in December, a quieter ending note for what was nonetheless a very strong year overall. The latest data from the Regional Multiple Listing Service shows a decline in new sales from November, but local real estate agent Mike Lamb says the market is still well-positioned for a strong 2019, if the right conditions are met. “In retrospect, you might say 2018 was a play with two very different acts,” Lamb wrote in his monthly report.