On average, listings lease in the $10's per square foot per year. The Warrenville region is going through a decrease in rates. In the last 3 months, the median rate decreased $11 per sqft per year. That's a 41% decline in rent.
Compared to the rest of the Chicagoland market, the Warrenville region has less expensive rates, so you should have no trouble finding a great deal in this discounted region.
In the last 90 days, 19 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,500 sqft. Most buildings in this region are around 2 floors. Most buildings in this area were built in 1999 and are Class B.