The typical asking rate per listing is in the $20's per square foot per year. The Charleston region is seeing a a boost in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 5% rise in rent.
In the last 90 days, 1 listings have been made available, which means leases most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 68,670 sqft, there are still 0 office spaces below 2,000 sqft. Most buildings in this area are around 12 floors. Most buildings in this region were built in 1984 and are Class B.