The typical asking rate per listing is in the $10's per square foot per year. The Sullivan County submarket is going through a decline in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 4% decline in rent.
In the last 90 days, 13 listings have been listed, which means office spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 85% of the available leases in the Sullivan County 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 860 sqft. Most properties in this area are around 2 stories. Most buildings in this area were built in 1930 and are Class Class B.