Waxhaw Housing Market Update for February 2019. The Waxhaw area of the Charlotte, North Carolina metro area (the 28173 zip code–encompassing the three towns of Waxhaw, Marvin and Weddington) continued to see tight inventory and no increases in new listings impacting sales negatively. The months supply of homes in February decreased by almost a full month since January 2019. While closed sales were down 20% overall, closed sales of resale homes were down only 2%. Days on market continue to decrease in 2019. New construction homes continue to carry a big premium over resale homes, selling at about $77,000 more per home on average.