On average, listings lease in the $20's per square foot per year. The Dorchester County region is going through a an increase in rates. In the last 3 months, the median rate rose $28 per sqft per year.
In the last 90 days, 15 listings have come on the market, which means listings are probably going fast. You'll want to be prepared to make an offer immediately. About 100% of the available leases in the Dorchester County 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 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 2,450 sqft. Most buildings in this region are close to 2 floors. Most buildings in this region were built in 1989 and are Class B.