Most listings are in the $10's per square foot per year. The Sioux Falls submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 5% increase in rent.
In the last 90 days, 93 listings have been made available, so you'll want to check back regularly for new listings. About 2% of the listings in the Sioux Falls 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 available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,930 sqft. Most properties in this region are around 2 floors. Most buildings in this area were built in 1990 and are Class A.