Most listings are in the $20's per square foot per year. The Oklahoma region is going through a a boost in rates. In the last 3 months, the median rate increased $21 per sqft per year.
In the last 90 days, 1030 listings have been posted online, so you'll want to check back regularly for new listings. About 106% of the listings in the Oklahoma are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,080 sqft. Most buildings in this market are approximately 2 stories. Most buildings in this region were built in 1982 and are Class B.