Waxhaw (28173 zip code) real estate report/snapshot: August 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 24.7% year-over-year) and a continued decrease (down 12.6%) in new listings year-over-year. With continued tight inventory and fewer new listings, Waxhaw area remains a seller’s market. Lack of inventory has driven up home prices — 4.4% for resale home year-over-year, while median home sale prices increased 10.6% year-over-year. The months supply of homes dropped 25% in August versus the same month last year and resale home inventory is low at 2.5 months.