The cost of eCommerce warehousing will differ if you build a warehouse vs. rent one. The typical cost in building a warehouse revolves around $20 to $60 per square foot. For example, the cost of a 5000 sq. ft. warehouse can be $140,000 or $25 per sq. ft. On the other hand, the cost of renting a warehouse is anywhere between $0.85 to $11.40 per square foot or more depending on the warehousing type and facility.