The typical asking rate per listing is in the $20's per square foot per year. The Martin County region is experiencing a an increase in rates. In the last 3 months, the median rate increased $2 per sqft per year. That's a 10% increase in rent.
In the last 90 days, 25 listings have been posted online, which means listings are probably leasing quickly. You'll want to be prepared to make an offer immediately. 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 1,000 sqft. Most properties in this area are close to 2 stories. Most buildings in this region were built in 1983 and are Class B.