In the last 90 days, 133 listings have come on the market, so you'll want to check back regularly for new listings. About 98% of the available space in the Charleston 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,000 sqft. Most properties in this region are close to 2 floors. Most buildings in this market were built in 1983 and are Class A.