On average, listings lease in the $10's per square foot per year. The Corning submarket is going through a an increase in rates. In the last 3 months, the median rate rose $18 per sqft per year.
In the last 90 days, 3 listings have been posted online, which means leases might be going fast. You'll want to be prepared to tour spaces as quick as possible. About 133% of the office spaces in the Corning 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 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 2,200 sqft. Most buildings in this market are around 2 stories. Most buildings in this market were built in 1910 and are Class B.