The typical asking rate per listing is in the $10's per square foot per year. The Spartanburg submarket is going through a decrease in rates. In the last 3 months, the median rate fell $6 per sqft per year. That's a 28% decline in rent.
In the last 90 days, 33 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 82% of the office spaces in the Spartanburg 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 1,200 sqft. Most buildings in this region are around 2 floors. Most buildings in this market were built in 1972 and are Class A.