On average, listings lease in the $30's per square foot per year. The Payne County region is going through a a rise in rates. In the last 3 months, the median rate increased $32 per sqft per year.
In the last 90 days, 2 listings have been listed, which means listings most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 200% of the available leases in the Payne 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,120 sqft. Most buildings in this area are close to 2 stories. Most buildings in this market were built in 1994 and are Class A.