The typical asking rate per listing is in the $10's per square foot per year. The Okemos submarket is going through 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 come on the market, which means new listings might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 115% of the office spaces in the Okemos 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 posted, 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 region are close to 1 stories. Most buildings in this market were built in 1985 and are Class A.