The typical asking rate per listing is in the $10's per square foot per year. The Rock County submarket is going through a an increase in rates. In the last 3 months, the median rate rose $3 per sqft per year. That's a 17% rise in rent.
In the last 90 days, 68 listings have come on the market, so you'll want to check back regularly for new listings. 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 1,800 sqft. Most properties in this market are around 2 floors. Most buildings in this area were built in 1983 and are Class B.