The typical asking rate per listing is in the $10's per square foot per year. The St. Augustine region is seeing a decline in rates. In the last 3 months, the median rate fell $18 per sqft per year. That's a 56% decrease in rent.
In the last 90 days, 2 listings have been listed, which means new availabilities are probably 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 1,950 sqft. Most buildings in this area are approximately 2 stories. Most buildings in this region were built in 1986 and are Class A.