The typical asking rate per listing is in the $10's per square foot per year. The Greenwood submarket is going through a a rise in rates. In the last 3 months, the median rate went up $18 per sqft per year.
In the last 90 days, 11 listings have been posted online, which means office spaces most likley are leasing quickly. You'll want to be prepared to make an offer immediately. About 100% of the available leases in the Greenwood 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 1,300 sqft. Most properties in this area are close to 1 stories. Most buildings in this region were built in 1966 and are Class B.