On average, listings lease in the $10's per square foot per year. The Mankato region is experiencing a a rise in rates. In the last 3 months, the median rate rose $4 per sqft per year. That's a 25% rise in rent.
In the last 90 days, 22 listings have been listed, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 64% of the listings 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 1,500 sqft. Most buildings in this region are close to 3 stories. Most buildings in this region were built in 1977 and are Class B.