On average, listings lease in the $20's per square foot per year. The Franklin Park submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $27 per sqft per year.
In the last 90 days, 1 listings have been posted online, which means office spaces might be going fast. You'll want to be prepared to make an offer immediately. About 200% of the available leases in the Franklin Park are subleases, so you might be able to find a shorter term or below market rent. 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 1,550 sqft. Most buildings in this region were built in 1999 and are Class A.