On average, listings lease in the $10's per square foot per year. The Okemos submarket is experiencing a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 6% decline in rent.
In the last 90 days, 35 listings have been listed, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 11% of the available leases 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,390 sqft. Most properties in this market are approximately 1 floors. Most buildings in this market were built in 1985 and are Class A.