Most listings are in the $20's per square foot per year. The Summerville submarket is experiencing a a rise in rates. In the last 3 months, the median rate increased $24 per sqft per year.
In the last 90 days, 11 listings have been made available, which means leases most likley are leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About 136% of the listings in the Summerville are subleases, so you might be able to find a shorter term or below market rent. 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 2,700 sqft, there are still 0 spaces below 2,000 sqft. Most buildings in this area are close to 2 floors. Most buildings in this market were built in 1989 and are Class A.