Most listings are in the $10's per square foot per year. The Warren County region is experiencing a a rise in rates. In the last 3 months, the median rate rose $16 per sqft per year.
In the last 90 days, 4 listings have been made available, which means new availabilities 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 2,000 sqft. Most properties in this market are close to 3 stories. Most buildings in this region were built in 1948 and are Class B.