Should You Buy New Construction or Resale in Williamson County, TN? In 2026, Williamson County has 84 actively selling new construction communities from 88 different builders — more options than most buyers realize when they start their search. New construction often comes with builder incentives like rate buydowns and closing cost credits, plus warranty coverage and modern layouts that resale homes can't offer. Resale homes, by contrast, give you access to established neighb