The typical asking rate per listing is in the $10's per square foot per year. The St. Petersburg submarket is seeing a an increase in rates. In the last 3 months, the median rate increased $20 per sqft per year.
In the last 90 days, 90 listings have been listed, so you'll want to check back regularly for new listings. About 134% of the listings in the St. Petersburg 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.
The standard measurement for office space in this area is around 2,020 sqft. Most properties in this region are close to 2 floors. Most buildings in this region were built in 1954 and are Class B.