Barndominiums are typically cheaper than traditional brick-and-mortar homes because the construction process is much simpler. That said, the type of exterior construction materials will have an impact on the total price. In general, steel barndominiums are more expensive to build than pole barndominiums. But, in both cases, there are lots of other factors, like the cost of the interior fixtures, the materials and the size of the structure that can add to the cost of the home.