The typical asking rate per listing is in the $10's per square foot per year. The Pennington County region is going through a a boost in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 59 listings have been listed, so you'll want to check back regularly for new listings. About 64% of the available leases in the Pennington County are subleases, so you might be able to snag a great spot on a short term. 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 1,000 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this market were built in 1989 and are Class B.