On average, listings lease in the $20's per square foot per year. The Port St. Lucie submarket is going through a a rise in rates. In the last 3 months, the median rate rose $1 per sqft per year. That's a 3% increase in rent.
In the last 90 days, 98 listings have been listed, so you'll want to check back regularly for new listings. About 2% of the available leases in the Port St. Lucie are subleases, so you will probably have to focus your search on direct office leases. There aren't many listings below 2,000 square feet available, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,170 sqft. Most properties in this market are close to 1 stories. Most buildings in this market were built in 2004 and are Class A.