Most listings are in the $10's per square foot per year. The Corning submarket is seeing a a rise in rates. In the last 3 months, the median rate went up $18 per sqft per year. That's a Inf% rise in rent.
In the last 90 days, 2 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 2,200 sqft. Most buildings in this region are approximately 2 floors. Most buildings in this region were built in 1910 and are Class B.