The typical asking rate per listing is in the $10's per square foot per year. The Okemos submarket is experiencing a an increase in rates. In the last 3 months, the median rate went up $18 per sqft per year.
In the last 90 days, 40 listings have been made available, which means new listings most likley are going fast. You'll want to be prepared to make an offer immediately. About 113% of the listings in the Okemos are subleases, so you might be able to snag a great spot on a short term. 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 1,900 sqft. Most buildings in this area are approximately 1 floors. Most buildings in this area were built in 1985 and are Class A.