Waxhaw (28173 zip code) real estate report/snapshot: July 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 24.5% year-over-year) and a continued decrease (down 3%) 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 — 8.1% for resale home year-over-year. July 2019 saw both closed and pending sales up.