Most listings are in the $10's per square foot per year. The St. Augustine submarket is going through a decline in rates. In the last 3 months, the median rate decreased $18 per sqft per year. That's a 56% decrease in rent.
In the last 90 days, 2 listings have been listed, which means leases might be leasing quickly. You'll want to be prepared to make an offer immediately. There aren't many listings below 2,000 square feet posted, 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 properties in this market are close to 2 stories. Most buildings in this region were built in 1986 and are Class A.