On average, listings lease in the $20's per square foot per year. The Myrtle Beach region is experiencing a a rise in rates. In the last 3 months, the median rate increased $5 per sqft per year. That's a 22% increase in rent.
In the last 90 days, 15 listings have been listed, which means new listings most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. About 7% of the listings in the Myrtle Beach are subleases, so you will probably have to focus your search on direct office leases. 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 1,500 sqft. Most buildings in this region are close to 2 floors. Most buildings in this area were built in 1996 and are Class A.