Most listings are in the $10's per square foot per year. The Chanhassen region is going through a a rise in rates. In the last 3 months, the median rate went up $16 per sqft per year.
In the last 90 days, 20 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 40% of the available leases in the Chanhassen 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 on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,190 sqft. Most buildings in this market are approximately 1 stories. Most buildings in this market were built in 1999 and are Class A.