How much a pole barn should cost. Average costs and comments from CostHelper's team of professional journalists and community of users. Kits containing the materials needed to build a pole barn start around $5,000-$10,000 for a smaller structure (15x20-foot to 30x40-foot, with 10-foot-high walls), depending on size and the number and type of options included such as large barn/garage doors, people-sized entry doors, windows, a storage loft and insulation.
