The typical asking rate per listing is in the $10's per square foot per year. The Cass County region is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decline in rent.
In the last 90 days, 8 listings have been made available, which means new listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 13% of the listings in the Cass County are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,400 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this region were built in 1997 and are Class A.