The typical asking rate per listing is in the $20's per square foot per year. The Dorchester County submarket is going through a a rise in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 10% rise in rent.
In the last 90 days, 10 listings have been posted online, which means spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 1,890 sqft. Most properties in this region are close to 2 stories. Most buildings in this region were built in 1989 and are Class B.