On average, listings lease in the $10's per square foot per year. The Sioux Falls region is going through a decline in rates. In the last 3 months, the median rate decreased $0 per sqft per year. That's a 2% decrease in rent.
In the last 90 days, 96 listings have been listed, so you'll want to check back regularly for new listings. About 2% of the office spaces 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,690 sqft. Most properties in this market are around 2 stories. Most buildings in this area were built in 1990 and are Class A.