The typical asking rate per listing is in the $10's per square foot per year. The South Dakota submarket is seeing a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 4% rise in rent.
In the last 90 days, 248 listings have been made available, so you'll want to check back regularly for new listings. About 1% of the available leases in the South Dakota are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,000 sqft. Most properties in this area are close to 2 floors. Most buildings in this area were built in 1993 and are Class A.