The typical asking rate per listing is in the $10's per square foot per year. The North Myrtle Beach region is going through a decline in rates. In the last 3 months, the median rate fell $4 per sqft per year. That's a 19% decrease in rent.
In the last 90 days, 3 listings have been posted online, which means new availabilities most likley are going fast. You'll want to be prepared to tour spaces as quick as possible. 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 2,330 sqft. Most buildings in this region are close to 3 stories. Most buildings in this market were built in 2008 and are Class A.