Most listings are in the $20's per square foot per year. The Winnebago County submarket is going through a an increase in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 13% rise in rent.
In the last 90 days, 9 listings have been listed, which means spaces might be leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 111% of the listings in the Winnebago 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 1,950 sqft. Most buildings in this region are approximately 1 stories. Most buildings in this area were built in 1961 and are Class B.