The typical asking rate per listing is in the $10's per square foot per year. The Oshkosh submarket is going through a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 12% increase in rent.
In the last 90 days, 3 listings have come on the market, which means office spaces are probably going fast. You'll want to be prepared to make an offer immediately. 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 7,000 sqft, there are still 0 leases below 2,000 sqft. Most properties in this market are close to 2 stories. Most buildings in this region were built in 0 and are Class B.