The typical asking rate per listing is in the $10's per square foot per year. The Sangamon County submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 7% increase in rent.
In the last 90 days, 37 listings have been made available, which means new availabilities most likley are going fast. You'll want to be prepared to make an offer immediately. About 62% of the available space in the Sangamon 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 posted, so finding a space for a small business might be tough.
Even though the median size is 3,520 sqft, there are still 0 leases below 2,000 sqft. Most buildings in this region are close to 2 stories. Most buildings in this area were built in 1989 and are Class A.