Waxhaw (28173 zip code) real estate report/snapshot: September 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 (dropping 21.9% year-over-year) despite an increase (+16.4%) in new listings year-over-year. With continued tight inventory and decreasing days on market, Waxhaw homes are selling quickly and the area remains a seller’s market. Lack of inventory has driven up average home prices — +5.1% year-over-year, while median home sale prices increased 5.7% year-over-year. The months supply of homes dropped 25% in September versus the same month last year and resale home inventory is low at 2.4 months.