On average, listings lease in the $10's per square foot per year. The South Dakota region is going through a a rise in rates. In the last 3 months, the median rate went up $0 per sqft per year. That's a 2% increase in rent.
In the last 90 days, 171 listings have come on the market, so you'll want to check back regularly for new listings. About 2% of the office spaces in the South Dakota are subleases, so you will probably have to consider a longer term lease. 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 2,000 sqft. Most buildings in this area are approximately 2 floors. Most buildings in this market were built in 1991 and are Class A.