How did the Fort Mill and Tega Cay housing markets do in September 2019? The Fort Mill and Tega Cay, SC housing markets remained seller markets in September 2019 with three months or less of inventory in both towns. Overall housing inventory in Fort Mill was down year-over-year, despite an increase in new listings. However, the increase in new listings helped bump up Fort Mill’s closed sales in September. Tega Cay saw a significant increase in new listings and inventory resulting in increased closed and pending sales.