The typical asking rate per listing is in the $20's per square foot per year. The Charleston County submarket is seeing a decrease in rates. In the last 3 months, the median rate fell $2 per sqft per year. That's a 6% decrease in rent.
In the last 90 days, 109 listings have come on the market, so you'll want to check back regularly for new listings. About 4% of the available leases in the Charleston County are subleases, so you will probably need to consider the implications of signing a direct lease with the building. 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 1,600 sqft. Most buildings in this market are close to 2 floors. Most buildings in this market were built in 1988 and are Class A.