The typical asking rate per listing is in the $20's per square foot per year. The Fishers submarket is going through a a rise in rates. In the last 3 months, the median rate rose $24 per sqft per year.
In the last 90 days, 21 listings have been posted online, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 86% of the office spaces in the Fishers 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 available, so finding a space for a small business might be tough.
Even though the median size is 4,920 sqft, there are still 0 leases below 2,000 sqft. Most properties in this area are around 1 floors. Most buildings in this market were built in 1991 and are Class A.