how much does it cost to build a barn
1 According to the Craftsman Book Company, the average cost for building a barn of the type described above will average at $45,000. 2  The resale value of this update would hold at $34,690, or an approximately 77% return on investment. 3  The above figures place the cost of the barn at $37.55 per square foot.or this discussion we will assess the cost of building a sturdy traditional English-style hay barn of 1200 square feet (30'x40') that can serve to house livestock or as a form of general storage.