On average, listings lease in the $20's per square foot per year. The Duval County region is going through a a boost in rates. In the last 3 months, the median rate increased $1 per sqft per year. That's a 5% rise in rent.
In the last 90 days, 344 listings have been made available, so you'll want to check back regularly for new listings. About 1% of the listings in the Duval County are subleases, so you will probably have to consider a longer term lease. 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 3,310 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this area are around 2 stories. Most buildings in this market were built in 1983 and are Class B.