On average, listings lease in the $10's per square foot per year. The Mount Pleasant submarket is seeing a an increase in rates. In the last 3 months, the median rate rose $18 per sqft per year.
In the last 90 days, 4 listings have been made available, which means new listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 300% of the available leases in the Mount Pleasant 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 posted, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 2,400 sqft. Most buildings in this region are around 1 stories. Most buildings in this market were built in 1979 and are Class C.