Most listings are in the $10's per square foot per year. The Peoria County submarket is going through a an increase in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 4% increase in rent.
In the last 90 days, 198 listings have been listed, so you'll want to check back regularly for new listings. 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 1,250 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 1971 and are Class C.