Ballantyne Housing Market Update/Video: June 2019. Average Ballantyne home sale prices increased significantly in June 2019 compared with the same month one year ago and the prior month of May 2019. Ballantyne homes, on average, sold in under one month. Pending sales were up 27.6% in June. The months supply of homes remained low at 2.1 months and a 14.2% drop in housing inventory kept the Ballantyne area/28277 zip code housing market a seller’s market.