The typical asking rate per listing is in the $30's per square foot per year. The St. Augustine region is experiencing a a boost in rates. In the last 3 months, the median rate went up $3 per sqft per year. That's a 8% increase in rent.
In the last 90 days, 2 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. About 200% of the available leases 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 posted, 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 market are close to 1 floors. Most buildings in this region were built in 1986 and are Class B.