On average, listings lease in the $30's per square foot per year. The Collinsville region is experiencing a a rise in rates. In the last 3 months, the median rate went up $30 per sqft per year.
In the last 90 days, 4 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to make an offer immediately. About 275% of the listings in the Collinsville 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 900 sqft. Most buildings in this market are close to 1 floors. Most buildings in this market were built in 1997 and are Class C.