Most listings are in the $10's per square foot per year. The Springfield submarket is seeing a an increase in rates. In the last 3 months, the median rate went up $2 per sqft per year. That's a 12% increase in rent.
In the last 90 days, 91 listings have been made available, so you'll want to check back regularly for new listings. About 1% 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 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 1,380 sqft. Most buildings in this market are around 2 stories. Most buildings in this area were built in 1999 and are Class A.