The typical asking rate per listing is in the $30's per square foot per year. The St. Augustine region is going through a a rise in rates. In the last 3 months, the median rate rose $21 per sqft per year. That's a 151% rise in rent.
In the last 90 days, 2 listings have come on the market, which means leases are probably leasing quickly. You'll want to be prepared to make an offer immediately. About 200% of the office spaces in the St. Augustine 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 available, so finding a space for a small business might be tough.
Even though the median size is 6,870 sqft, there are still 0 new listings below 2,000 sqft. Most buildings in this region are around 1 stories. Most buildings in this area were built in 1986 and are Class B.