In the last 90 days, 101 listings have been made available, so you'll want to check back regularly for new listings. About 3% of the available leases 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 2,000 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 1990 and are Class A.