On average, listings lease in the $20's per square foot per year. The Mankato submarket is experiencing a a boost in rates. In the last 3 months, the median rate went up $22 per sqft per year.
In the last 90 days, 22 listings have been listed, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 141% of the available space in the Mankato are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,000 sqft. Most buildings in this area are around 3 stories. Most buildings in this area were built in 1977 and are Class B.