Most listings are in the $10's per square foot per year. The Sangamon County submarket is going through a decline in rates. In the last 3 months, the median rate fell $3 per sqft per year. That's a 13% decline in rent.
In the last 90 days, 37 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 122% of the available leases in the Sangamon County are subleases, so you might be able to find a shorter term or below market rent. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
Even though the median size is 3,000 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this market are around 2 floors. Most buildings in this region were built in 1989 and are Class A.