On average, listings lease in the $20's per square foot per year. The Myrtle Beach submarket is experiencing a a boost in rates. In the last 3 months, the median rate increased $29 per sqft per year.
In the last 90 days, 8 listings have come on the market, which means new listings might be going fast. You'll want to be prepared to make an offer immediately. About 150% of the available space in the Myrtle Beach are subleases, so you might be able to sign a shorter term by taking over a previous lease. 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 2,100 sqft. Most properties in this market are close to 2 stories. Most buildings in this area were built in 1997 and are Class A.