Most listings are in the $20's per square foot per year. The Bismarck region is seeing a an increase in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 6% rise in rent.
In the last 90 days, 19 listings have been made available, which means new availabilities are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 5% of the available leases in the Bismarck are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,100 sqft. Most properties in this market are approximately 3 stories. Most buildings in this area were built in 1987 and are Class A.