On average, listings lease in the $20's per square foot per year. The Springfield region is going through a a rise in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% increase in rent.
In the last 90 days, 38 listings have come on the market, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 8% of the listings in the Springfield are subleases, so you will probably need to sign a longer term lease with the landlord directly. There aren't many listings below 2,000 square feet posted, so finding a space for a small business might be tough.
Even though the median size is 7,000 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this region are around 2 stories. Most buildings in this market were built in 1915 and are Class A.