Most listings are in the $20's per square foot per year. The Portage submarket is going through a an increase in rates. In the last 3 months, the median rate increased $26 per sqft per year.
In the last 90 days, 11 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 91% of the listings in the Portage 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 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 2,410 sqft. Most properties in this region are approximately 1 floors. Most buildings in this market were built in 1982 and are Class A.