Pole Barn A pole barn is a type of post-frame construction most commonly used for garages, house barns, and office space. However, you can also use them for basketball courts. Costs add up substantially, with average estimates between $8,000 and $20,000.

Converting an existing barn or garage into an indoor basketball court costs $4 to $16 per square foot to add flooring, a hoop, and paint the court lines.

A pole building of this size costs around $75,000, but can vary in price when you account for differences in square footage, regional material costs, and local design requirements.