The typical asking rate per listing is in the $10's per square foot per year. The Green Bay submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $3 per sqft per year. That's a 17% increase in rent.
In the last 90 days, 17 listings have come on the market, which means leases most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 35% of the office spaces in the Green Bay 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.
The standard measurement for office space in this area is around 1,300 sqft. Most buildings in this region are around 2 stories. Most buildings in this market were built in 1981 and are Class B.