Most listings are in the $10's per square foot per year. The St. Lucie County submarket is going through a a boost in rates. In the last 3 months, the median rate went up $1 per sqft per year. That's a 3% rise in rent.
In the last 90 days, 144 listings have been posted online, so you'll want to check back regularly for new listings. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 1,680 sqft. Most properties in this area are around 2 stories. Most buildings in this region were built in 1996 and are Class A.