Most listings are in the $70's per square foot per year. The Chaska submarket is experiencing a a rise in rates. In the last 3 months, the median rate rose $48 per sqft per year. That's a 200% rise in rent.
In the last 90 days, 26 listings have been made available, which means listings most likley are going fast. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,390 sqft. Most properties in this area are around 2 floors. Most buildings in this region were built in 1999 and are Class B.