Most listings are in the $10's per square foot per year. The Cocoa submarket is going through a a rise in rates. In the last 3 months, the median rate increased $16 per sqft per year. That's a Inf% increase in rent.
In the last 90 days, 7 listings have been listed, which means office spaces most likley are going fast. You'll want to be prepared to make an offer immediately. 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 700 sqft. Most properties in this market are close to 1 floors. Most buildings in this market were built in 1926 and are Class B.