Most listings are in the $10's per square foot per year. The Fargo submarket is going through a decline in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 10% decline in rent.
In the last 90 days, 5 listings have been posted online, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,350 sqft. Most properties in this region are approximately 2 stories. Most buildings in this area were built in 1997 and are Class B.