On average, listings lease in the $20's per square foot per year. The Hiawatha submarket is going through a a boost in rates. In the last 3 months, the median rate increased $8 per sqft per year. That's a 50% rise in rent.
In the last 90 days, 7 listings have been listed, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 1,630 sqft. Most buildings in this region were built in 2005.