Most listings are in the $20's per square foot per year. The Berkeley County region is experiencing a an increase in rates. In the last 3 months, the median rate went up $21 per sqft per year.
In the last 90 days, 3 listings have come on the market, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 1,500% of the office spaces in the Berkeley County are subleases, so you might be able to snag a great spot on a short term. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,500 sqft. Most properties in this region are close to 2 floors. Most buildings in this area were built in 1974 and are Class C.