On average, listings lease in the $20's per square foot per year. The North Charleston submarket is seeing a a boost in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 20% increase in rent.
In the last 90 days, 31 listings have come on the market, which means spaces most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 6% of the listings in the North Charleston are subleases, so you will probably have to consider a longer term 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.
Even though the median size is 3,480 sqft, there are still 0 spaces below 2,000 sqft. Most properties in this market are approximately 2 stories. Most buildings in this region were built in 1992 and are Class A.