Most listings are in the $20's per square foot per year. The St. Petersburg region is going through a decrease in rates. In the last 3 months, the median rate fell $1 per sqft per year. That's a 3% decline in rent.
In the last 90 days, 90 listings have been posted online, so you'll want to check back regularly for new listings. About 1% of the available leases in the St. Petersburg are subleases, so you will probably have to consider a longer term lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
Even though the median size is 2,960 sqft, there are still 0 new listings below 2,000 sqft. Most properties in this market are close to 2 floors. Most buildings in this area were built in 1950 and are Class B.