The typical asking rate per listing is in the $20's per square foot per year. The Burleigh County region is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 6% decline in rent.
In the last 90 days, 20 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 80% of the available leases in the Burleigh County are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,700 sqft. Most properties in this market are around 3 floors. Most buildings in this area were built in 1994 and are Class A.